Climate Adaptation in Vennar Subbasin in Cauvery Delta · 1. The Climate Adaptation in Vennar Subbasin in Cauvery Delta1 supports the implementation of the Government of India’s

Climate Adaptation in Vennar Subbasin in Cauvery Delta Project (RRP IND 44429)

Climate Adaptation in Vennar Subbasin in

Cauvery Delta

Updated Appendix J2: Detailed Economic and Financial Analysis

January 2016

Asian Development Bank

ECONOMIC AND FINANCIAL ANALYSIS

http://www.adb.org/Documents/RRPs/?id=44429-013-3

http://www.adb.org/Documents/RRPs/?id=44429-013-3

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08 October 2014

Climate Adaptation through Subbasin Development Program


Climate Adaptation in Vennar Subbasin in Cauvery Delta


January 2016

Asian Development Bank


T +31 (0)26 3577 111 F +31 (0)26 3577 577 W www.mottmac.comott MacDonald, Amsterdamseweg 15, 6814 CM Arnhem, Netherlands


Issue and revision record Revision Date Originator Checker Approver Description A 10 October 2014 A.M. Mueller,

International Economist

I Hogg, TL P Ede, Final

B February 2015 A.M. Mueller, ADB-Staff Consultant

R. Jones (ADB) N.M. Amerasinghe (ADB)

Update incorporating ADB comments and changes in costs

C 22 May 2015 A.M. Mueller, ADB-Staff Consultant


Update incorporating additional ADB comments and changes in costs at fact finding, Poverty Impact Ratio

D 8 August 2015 A.M. Mueller, ADB-Staff Consultant


Applying ERD Comment 10

E 19 August 2015 A.M. Mueller, ADB-Staff Consultant


Final Monte Carlo analysis

F 28 December 2015 A.M. Mueller, ADB-Staff Consultant


Final update incorporating final civil and resettlement costs, additional ERD comments

Information Class: Standard

This document is issued for the party which commissioned it and for specific purposes connected with the above-captioned project only. It should not be relied upon by any other party or used for any other purpose.

We accept no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties.

This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from us and from the party which commissioned it.

TABLE OF CONTENTS

PAGE

I. Background 1

II. THE PROJECT 3

III. PROJECT BENEFITS 5

Agricultural Benefits 5 A.

Figure 3.1. Location of Project rivers, pumping schemes and production zones 6

Flood protection benefits 6 B.

Table 3.1. Flood protection and climate change 7

Table 3.2. Weighted average annual value of flood protection benefits for Thanjavur & Nagapattinam districts (INR, 2015 price level) 8

Cropping patterns and Annual Crop Net Benefits 9 C.

Table 3.3. Cropping patterns 2015 (%) 9

Table 3.4. Cropping patterns 2025 (%) 9

Yields and crop budgets 10 D.

Table 3.5. Annual Net Crop Benefits 2015 and 2025 per productivity level (INR/ha) 10

Financial and Economic prices and conversions 11 E.

Table 3.6. Financial and economic prices (INR, 2014/15 price level) 11

IV. REHABILITATION OF STRUCTURES ANDRESECTIONING OF EMBANKMENTS 13

Adappar River 13 A.

Table 4.1. Structures on Adappar River 13

Table 4.2. Summary of base costs for Adappar River (INR million) 13

Harichandra River 14 B.

Table 4.4. Summary of base costs for Harichandra River (INR million) 14

Vellaiyar River 15 C.

Table 4.5. Structures on Vellaiyar River 15

Table 4.6. Summary of base costs for Vellaiyar River (INR million) 15

Pandavanar River 16 D.

Table 4.7. Structures on Pandavanar River 16

Table 4.8. Summary of base costs for Pandavanar River (INR million) 16

Valavanar Drain 17 E.

Table 4.9. Structures on Valavanar Drain 17

Table 4.10. Summary of base costs for Valavanar Drain (INR million) 17

Vedharanyam Canal 17 F.


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Table 4.11. Structures on Vedharayam Canal 18

Table 4.12. Summary of base costs for Vedheranyam Canal (INR million) 18

Cost Benefit Analysis 18 G.

Table 4.13. Summary of base and financial costs for Rivers/Canal/Drains (INR million) 19

V. PUMP IRRIGATION SCHEMES 20

Technical Feasibility 20 A.

Cost Benefit Analysis 21 B.

Table 5.1. Base and financial costs for pumping schemes, EIRR (INR million) 22

VI. SENSITIVITY AND POVERTY ANALYSIS 24

Sensitivity Analysis 24 A.

Table 6.1. Sensitivity analysis at Sub-project and at Project level 24

Figure 6.1. Probability analysis of EIRR under Climate Change scenarios 26

Figure 6.2. Probability analysis of FIRR under Climate Change scenarios 27

Distribution Analysis and Poverty Impact Ratio 27 B.

Table 6.3. Distribution Analysis (INR mln) 28

Table 6.4. Poverty Impact Analysis (INR mln) 28

1

I. BACKGROUND

1. The Climate Adaptation in Vennar Subbasin in Cauvery Delta1 supports the implementation of the Government of India’s National Action Plan on Climate Change (NAPCC) of 2008 and its National Water Mission (NWM) for the Cauvery Delta in Tamil Nadu. The Cauvery River basin (81,155 square kilometers [km2]) includes parts of Karnataka, Kerala and Tamil Nadu states. The project area is part of the Cauvery Delta (5,600 km2), which lies entirely within Tamil Nadu and encloses the Karaikal enclave of the Union Territory of Pondicherry. This delta potentially provides a good demonstration site for NWM objectives and the government’s water resources reform agenda. In addition, the delta represents a system where improved water management initiatives could address complex water resources issues such as limited availability of surface water, over-abstraction of groundwater and salinity intrusion, all exacerbated by climate change. The Cauvery delta includes four main irrigation systems, which are Lower Coleroon Anicut (53,000 hectares [ha]), Cauvery (200,000 ha), Vennar (190,000 ha), and Grand Anicut (121,000 ha). In 2013, the Water Resources Department prepared the Cauvery modernization proposal (CMP), for approximately $US1.9 billion.2 The CMP includes rehabilitation of most of the flood control and irrigation infrastructure in the Cauvery delta including improvements to on-farm irrigation systems. Of the four irrigation systems in the delta, the Vennar system is considered to be the most critical in terms of vulnerability to flooding and in need of improved water resources management.

2. The project aims to modernize irrigation infrastructure and establish improved management systems to improve water management in the Vennar system to help local communities adapt to climate change. The outputs of the project are: (i) flood management and irrigation infrastructure modernized, and (ii) improved water management systems established. The expected outcome is improved water management in the Vennar system of the Cauvery Delta. The project is aligned with (i) economic growth, including agricultural growth, in Tamil Nadu is accelerated, innovative, and inclusive (Twelfth Five Year Plan: 2012–2017)3; and (ii) coastal districts are protected from cyclonic storms and flooding exacerbated by climate change (Vision Tamil Nadu 2023).4

3. The Government of Tamil Nadu has requested ADB financing for modernization of the Vennar system. The proposed project will also finance feasibility study and detailed design of similar improvements in the remainder of the Vennar and Cauvery systems that may be financed under a subsequent project. The Government of Tamil Nadu (GoTN) plans to improve on-farm irrigation systems through another project financed by the government and other development partners.

4. The Government of India has requested a loan of $98 million from ADB’s ordinary capital resources to finance the investments for the Climate Adaptation through the Subbasin Development Investment Program. The loan will have an 25-year term including a grace period of 5 years, and annual interest rate determined in accordance with ADB’s London interbank offered rate (LIBOR), a commitment charge of 0.15% per year and such other terms and conditions as set forth in the draft loan and project agreements. The government will make the loan proceeds available to the State of Tamil Nadu and through the State to Water Resources Department of Tamil Nadu (WRD), promptly and on terms and conditions mutually acceptable to 1 During PPTA TA 8166-IND known as Climate Adaptation through Sub-Basin Development Program 2 WRD. 2013. Improvements and Rehabilitation of Irrigation Systems in the Cauvery Basin for Efficient Water

Management. 3 Planning Commission (Government of India), 2013: 12th Five Year Plan: 2012-2017 Economic Sector 4 Government of Tamil Nadu, 2014: Vision Tamil Nadu 2023, Strategic Plan for Infrastructure Development

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ADB and the government. GoTN will bear the foreign exchange risk on the ADB loan in accordance with the policy of the government. GoTN will contribute $42 million.

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II. THE PROJECT

5. The project focuses on the lower Vennar system and comprises 7 sub-projects: the channels of the Adappar, Harichandra, Vellaiyar and Pandavanar rivers, the Valavanar drain, and the Vedharanyam canal and coastal straight cuts, plus a sub-project comprising 13 pumped irrigation schemes. The locations of these rivers and pumping schemes are shown in Figure 3.1. Each sub-project consists of a number of components such as regulators, head sluices, drainage sluices, drainage in-falls, siphons, bed dams, grade walls and bridges. In addition, there are earth works for re-sectioning channels, including some flume-sections and roads. In the case of the pumped irrigation schemes, the components are electrical and mechanical equipment in the pump houses. All subproject except the pumped irrigation schemes include any necessary works on ancillary structures such as footbridges, ramps and cremation grounds, and resettlement and environmental costs.

6. In the Vennar system there are 7 head regulators at major river bifurcation points, 188 intermediate regulators serving command areas and 11 tail-end regulators. The tail-end regulators serve the dual purpose of increasing water levels to serve low lying command areas near the coast and preventing tidal backwaters in the system. When heavy rainfall occurs and drainage congestion takes place, the tail-end regulators are kept open to enable outflows, but high tides and storm surges occasionally restrict discharges out to sea. Parts of the sandy ridges in the delta are irrigated by pumped irrigation, using drainage water that otherwise would flow into the sea. Recognizing the dilapidated state of the system, the Pubic Works Division (PWD) has proposed interventions to restore the irrigation and drainage systems in the delta. These interventions are included in the river/drain/canal sub-projects and consist of repairs to and reconstruction of structures, construction of additional tail-end regulators and other structures, re-sectioning of river embankments. Each sub-project consists of a number of components such as regulators, head sluices, drainage sluices, drainage infalls, siphons, bed dams, grade walls and bridges. In addition there are earth works for re-sectioning including some flume-sections and roads.

7. The economic and financial analysis of the project has been conducted in accordance with the ADB Guidelines for the Economic Analysis of Projects. The economic analysis quantifies the incremental economic costs and benefits at the following levels: component, sub-project and project. This analysis aims to assess the economic viability of the envisaged investments from a macro-economic point of view. This is achieved by converting financial prices to economic prices by means of standard conversion factors (SCF) for rice and fertilizers economic prices were calculated based on world market prices. As the remaining life time of the irrigation and drainage structures that will be repaired or replaced by the project cannot be known exactly, a Monte Carlo simulation approach was used in combination with a triangular probability distribution of the years in which the structures and pumping schemes would fail in the without project case. The economic analysis yields the economic internal rate of return (EIRR), the economic cost-benefit ratio (ECBR) and the economic net present value (ENPV). The financial analysis does the same, but at financial prices, yielding the financial internal rate of return (FIRR), the financial cost-benefit ratio (CBR) and the financial net present value (FNPV). The Monte Carlo calculation shows for the mean, maximum, minimum and the standard deviation. These results are used to calculate the 95% probability interval of the EIRR and FIRR and the probability that these indicators exceed the 12% threshold.

8. The objective of the project is to maintain the status quo of the Vennar system through repairs and reconstruction of irrigation structures and pumping stations, and by making the system more resilient against flooding and climate change by the strengthening of river

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embankments, the widening of channels and the construction of river training works. A small number of new structures are proposed especially at the tail-end of the system. No new irrigation command areas are to be created. In the with-project case, all beneficiaries would maintain their present source(s) of irrigation. In the without-project case the beneficiaries would become dependent on fresh groundwater, if available, or would lose their agricultural livelihood if the groundwater is saline, as rainfed agriculture is not a viable option in the project area. The financial and economic consequences for these scenarios have been covered in the calculations of the applicable productivity levels. As agronomic improvements continue to be adopted by farmers in the Project area, two sets of yields have been used: the current level and a level which is expected to be reached by 2025; after 2025 it was assumed that yields will remain constant. Beneficiaries presently do not pay for irrigation investment and O&M nor for power for pumping and will not do so in future as it is the policy of the Government of Tamil Nadu to supply these services free of charge to the users. A financial analysis at the farm level for various types of beneficiaries with different farm sizes has therefore been omitted.

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III. PROJECT BENEFITS

9. Project benefits have been identified for each component of the 7 sub-projects. Agricultural benefits are expected to result from (i) repairs/reconstruction of irrigation structures and so maintaining the present levels of productivity, and (ii) the rehabilitation of pumping schemes by restoring water supplies to the original command areas (ayacuts) and maintaining productivity. Avoided flood damages of crops in the lower end of drainage area have been used to justify investments for repair or reconstruction of drainage sluices, drainage infalls, siphons and tail-end regulators. Weighted average annual avoided flood damages have been used to justify improvements of river embankments/widening of channels and the construction of river training works.

Agricultural Benefits A.

10. In order to quantify the agricultural benefits in monetary terms, productivity levels have been introduced. For the definition of the productivity levels, distinction has been made between ayacuts with fresh groundwater and ayacuts with saline groundwater. The border between fresh and saline groundwater has been taken as 250 parts per million (ppm) chloride. Location of the ayacut is the other factor taken into consideration. Tail-end ayacuts are defined as those for which the bottoms of the rivers at the tail-end regulators lie at or below sea level. Tail-end ayacuts have a less assured surface water supply and lower productivity level than ayacuts located higher up in the system. Furthermore, tail-end ayacuts do not have access to fresh groundwater. In order to assess the future impacts of climate change, productivity levels for moderate and severe climate change impacts were defined for the tail-end ayacuts. The locations of the boundaries between the fresh groundwater, saline groundwater and tail-end areas are indicated in Figure 3.1.

11. The present and future productivity levels of the command areas of all structures and lift irrigation schemes have been identified as (i) conjunctive use of surface and groundwater (CUSE), (ii) groundwater from borewells only (GRWT), (iii) surface irrigation full supply (SIFS), (iv) surface irrigation tail end (SITE), (v) surface irrigation tail end with moderate impact of climate change (SIMC); and (vi) surface irrigation tail end with severe impact of climate change (SISC). The expected effect of the repairs and reconstruction of structures and the rehabilitation of pump irrigation schemes is that the present productivity level will be maintained until 2050.

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Figure 3.1. Location of Project rivers, pumping schemes and production zones

12. Without the project, the productivity levels of command areas will decline depending on access to fresh groundwater and location in the irrigation system. Ayacuts with conjunctive use of gravity or pumped surface water and groundwater would lose their surface water supply and would become dependent on groundwater only. However, groundwater is not available to all farmers as there are insufficient borewells and hence insufficient groundwater to irrigate the full area. Results of the socio-economic survey carried out during the PPTA indicated that in areas with fresh groundwater 28% of the area is irrigated with groundwater to supplement surface water. In the without-project scenario, ayacuts with surface water supply only would become dependent on rainfall following the loss in supply. However rainfall is so erratic that cultivation of rainfed annual crops is impossible, with agriculture not viable in the project area without irrigation. This is reflected by the fact non-irrigation lands are covered with shrubs rather than supporting dryland cultivation. There is effectively only one monsoon in this part of Tamil Nadu as it is located within the rain shadow of the Western Ghat mountains which effectively cut-off the south-west monsoon. It has therefore been assumed that if no irrigation water is available, cropping would cease.

13. For structures that need to be repaired or replaced it has been assumed that downgrading of productivity would happen after 10 years in the without-project scenario. If the pumped irrigation schemes are not rehabilitated it was assumed that pumping would stop after five years. Cross regulators and bed dams do not have command areas of their own, but they enable the operation of head sluices which do have command areas and therefore benefit crop production.

14. The benefits of the repairs or renovation of drainage sluices, drainage infalls and siphons were estimated by assuming avoided crop losses due to poor drainage, in 10% of the drained command areas, of 80% of the financial and economic costs of paddy production.

Flood protection benefits B.

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15. Flood protection benefits consist of avoided flood damages. These damages happen at irregular intervals and at different scales, depending on the severity, timing and duration of the flood. Flood damage data have been collected in the project area at district level for the period 2004-2015 for loss of life, loss of livestock, and damages to crops, irrigation infrastructure, houses and roads. As the Project is located in the districts Thiruvarur and Nagapattinam, flood damage date from these districts have been used. Historic damage values have been converted to the 2015 price level using GDP-deflators. The annual values do not include indirect damages/costs such as costs for temporary relief measures, loss of labour opportunities, health expenses, temporary relocation, cleaning up, and disruption of transport, trade, and education. Based on anecdotal and field information, the flood damage data appears to be incomplete and underreported. For example, there were two major floods in 2005 with considerable loss of life and livestock, and yet no flood damages were reported for road reconstruction, crop losses or repair of irrigation, PWD and municipal structures. Another example is that there was severe flooding in the tail reaches of the Project rivers in November 2008, but there were no reported crop losses. No attempt was made to correct these inconsistencies or to use a correction factor to compensate for the underreporting of losses. Hence the resulting flood protection benefits can be considered a conservative estimate as they are incomplete and do not include indirect damages.

16. The frequency (return periods) of the floods causing the damage in the period 2004-13 have been obtained though hydrologic analysis and hydraulic modelling, while the return period for the 2015 flood was estimated by WRD Weighted average annual flood damage values were estimated using a probability-based approach and taking the project life into account. The flood protection provided by the Project was designed to largely contain a 1:25 year flood. This means that for floods with a lower return period most flood losses can be avoided with the proposed project works. For floods with a higher return period there will be a partial reduction in losses. Flood damage reductions factors were estimated by the PPTA team. By dividing the total cost of the damage by the areas of the two districts, the annual flood benefit per hectare for the with-project scenario was obtained. These average annual damage reductions are INR2,363/ha/year ($36/ha/year) and are by themselves insufficient to justify large investments in flood protection (Table 3.2). In the case of with-Project and without climate change scenario, there would be a 53% reduction in flooded area. In the case of with-Project and with climate change scenario there would be a 48% reduction in flooded area (Table Table 3.1), implying that in case of with climate change 15% more area would be flooded during a 1:25 year flood. The financial and economic analysis considers two climate change scenarios; medium and severe. In the case of medium climate change it was assumed that the flood protection benefits would be 10% less and in case of severe climate change these benefits were assumed to be 20% less than in the case of without climate change.

Table 3.1. Flood protection and climate change

River/

Drain

25-Year Flood without Climate Change 25-Year Flood with Climate Change

Flooded Area (km2) Reduction (%)

Flooded Area km2 Reduction (%) Without Project With Project Without Project With Project

Harichandra 51.1 5.4 89% 55.4 11.4 79%

Adappar 77.2 46.1 40% 79.5 54 32%

Vellaiyar 59.4 50.3 15% 64 52.3 18%

Pandavanar 25.9 4.7 82% 27.3 4.9 82%

Valavanar 35.2 11.3 68% 35.4 12.8 64%

Total 248.8 117.8 53% 261.6 135.4 48%

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Table 3.2. Weighted average annual value of flood protection benefits for Thanjavur & Nagapattinam districts (INR, 2015 price level)

Year Return period (years) /1

Probability of exceedance

Probability of occurrence within project life /2

Probability interval of occurrence

Damages without project

Interval damages without project

Damage reduction factor with project /3

Interval damage reduction

Average annual damage reduction

2013 1.1 0.909 1.000 12,809,407 0.98 0.242 12,028,019 0.97 2,813,827 2006 1.5 0.667 1.000 11,246,630 0.95 0.167 106,732,246 0.93 16,454,555 2004, 12 2 0.500 1.000 202,217,862 0.90 0.167 2,830,024,886 0.90 424,503,734 2005, 09, 15 3 0.333 1.000 5,457,831,911 0.90 0.167 3,725,050,286 0.90 558,818,940 2011 6 0.167 1.000 1,992,268,660 0.90 0.042 1,033,268,760 0.90 38,877,024 2007 8 0.125 0.999 74,268,860 0.90 0.060 718,406,788 0.83 35,734,764 2010 15 0.067 0.968 1,362,544,715 0.75 0.047 2,569,691,196 0.63 74,841,034 2008 40 0.025 0.718 3,776,837,677 0.50

Total in Districts 1,152,043,879

/1 Based on use of hydraulic models, 2015 estimated by WRD; /2 Project life 50 years Districts area (ha) 487,600 /3 Embankments are designed to contain the 1:25 year flood, reduction factors estimated by Consultants team

Damage reduction per ha 2,363

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Cropping patterns and Annual Crop Net Benefits C.

17. The agricultural seasons and possible crops per season in the project area are (i) Kuruvai (May-August) with paddy, (ii) Thaladi (September/October-March) with paddy, (iii) Samba (July/August-January) with paddy, followed by (iv) Summer (February-July) with black gram/green gram/gingelly (sesame) using residual moisture from surface irrigation or groundwater irrigation, depending on availability, and (v) Annual with sugarcane (one year). There is effectively only one monsoon in this part of Tamil Nadu as it is located within the rain shadow of the Western Ghat mountains which effectively cut-off the south-west monsoon. Paddy is only grown during the monsoon period as there is no supplementary water from other sources during the dry season except where groundwater is available. However, groundwater in the Project area is mostly saline, making irrigated cropping impossible at this time. As explained in paragraph 12, cultivation of crops is impossible in the absence of irrigation. Cropping patterns have been prepared for all of the above mentioned productivity levels, based on available statistics (which are based on administrative boundaries, not on availability of water resources) and on consultations with local experts. To each cropping pattern corresponds a total annual financial and economic crop net benefit. These benefits have been calculated for the present situation (2015) and for 2025 (at constant 2014/15 prices), see table 3.3 and 3.4. The 2025 values are assumed to be applicable till the end of the project period (2050).

Table 3.2. Cropping patterns 2015 (%)

Season/crop CUSE(i)

GRWT(ii)

SIFS(iii)

SITE(iv)

SIMC(v)

SISC(vi)

Kuruvai Paddy 90 30 Thaladi Paddy 90 30 Samba Paddy 100 100 80 60 Summer Black/Green gram RF 20 10 Black/Green gram IR 30 5 Gingelly rice-followed 10 5 Gingelly irrigated 10 5 Bi-annual Sugarcane 10 Total 230 70 130 115 80 60

(i) conjunctive use of surface and groundwater (CUSE), (ii) groundwater from borewells only (GRWT); this cropping pattern is based on groundwater being available only to about 30% of the area (iii) surface irrigation full supply (SIFS), (iv) surface irrigation tail end (SITE), (v) surface irrigation tail end with moderate impact of climate change (SIMC), (vi) surface irrigation tail end with severe impact of climate change (SISC). Table 3.3. Cropping patterns 2025 (%)

Season/crop CUSE GRWT/1

SIFS SITE SIMC SISC

Kuruwai Paddy 85 30

10

Season/crop CUSE GRWT/1

SIFS SITE SIMC SISC

Thaladi Paddy 85 30 Samba Paddy 100 100 60 40 Summer Black/Green gram RF 20 10 Black/Green gram IR 40 5 Gingelly rice-followed 10 5 Gingelly irrigated 15 5 Bi-annual Sugarcane 5 Total 230 70 130 115 60 40

'/ 1 This cropping pattern is based on groundwater being available only to about 30% of the area

Yields and crop budgets D.

18. Crop budgets have been prepared for the present situation (2015) and for 2025 for all considered productivity levels for the following crops: rice, green and black gram and gingelli (seasonal), and sugarcane (annual). Although the Project aims at maintaining the current level of irrigation water supply, agronomic improvements5 will result in higher yields. For the summer pulses the budgets differentiate between two water supply situations: (i) following rice on residual moisture, and (ii) irrigation with groundwater. The crop budgets have been based on the financial budgets as obtained from the Department of Agriculture of Thanjavur, costs of production as defined by Krishi Vigyan Kendra- Institute in Thanjavur and on the data collected during the Socio-Economic Survey carried out under the PPTA. The crop budgets have been established both on financial and in economic prices. The crop budgets and yields on which they are based are presented in Appendix A.

19. Financial and economic crop net benefits have been calculated for 2015 and for 2025 for the above mentioned productivity levels based on the cropping patterns and individual crop budgets (Table 3.5). Under severe climate change conditions cropping becomes uneconomic in 2025 in the tail-end area.

Table 3.5. Annual Net Crop Benefits 2015 and 2025 per productivity level (INR/ha)

CUSE GRWT SIFS SITE SIMC SISC

Financial prices 2015 115,045 29,228 34,785 14,450 8,584 -257 2025 144,540 35,320 45,420 18,170 4,206 -7,611 Economic prices 2015 154,244 42,294 52,854 28,810 19,083 5,392 2025 194,188 52,843 75,872 38,722 11,339 -2,352

5 Section 3.1, Appendix B to Main Report

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20. Both in the with-project case and the without-project cases it has been assumed that yields will gradually increase from 2015 to 2025 as indicated by these crop budgets. After 2025 it has been assumed that yields would be stable till the end of the project (2050).

Financial and Economic prices and conversions E.

21. The financial and economic analysis has been carried out in Indian Rupees (INR), using the 2014–2015 price level. Where an equivalent in US dollars ($) is mentioned, an exchange rate of INR65 to $1 has been used. The Government of India administered prices for crop outputs and fertilisers in particular are below world price levels, but output market prices are above the administered price (minimum support price). Wage rates are INR350/day for men and INR160/day for women. Due to good off-farm labour opportunities in Tamil Nadu, agricultural labour is not over-abundant and therefore no shadow labour rate has been applied. Border prices have been calculated for rice and fertilizers (Appendix J). Other financial prices were converted into economic prices using SCF obtained from the recent KISWRMIP feasibility study6, see Table 3.6.

Table 3.6. Financial and economic prices (INR, 2014/15 price level)

Unit Financial Price Standard Conversion

Factor/1 Economic Price

Outputs

Paddy kg 14.60 1.2 17.95

Straw and Stalks kg 5.00 0.9 4.50

Green/Black Gram kg 71.00 0.9 63.90

Gingelly kg 82.00 0.9 73.80

Sugarcane t 2,600.00 0.9 2,340.00

Inputs

Sugarcane Setts ha 7,200.00 0.9 6,480.00

Paddy Seed kg 30.00 0.9 27.00

Green/Black Gram Seed kg 75.00 0.9 67.50

Gingelly Seed kg 100.00 0.9 90.00

Zinc sulphate kg 39.00 1.4 54.60

Gypsum kg 2.00 1.0 2.00

Compost t 250.00 0.9 225.00

Tractor Hire ha 1,040.00 1.2 1,248.00

Combine Harvester ha 1,540.00 1.2 1,848.00

NPK kg 20.05 1.6 32.99

DAP Foliar kg 25.00 1.4 35.00

Bio-Fertilizer packet 6.00 0.8 4.80

Male labour day 350.00 0.9 315.00

Female labour day 160.00 0.9 144.00

Electric power kWh 8.50 1.2 10.20

/1 Based on KISWRMIP, WB Pink Sheets and Joint Director Agriculture Tiruvarur 22. Cost estimates for the civil works for the project as prepared by the WRD have been based on the current unit rates for construction materials, while construction work was taken 6 DHV (April 2013): KISWRMIP PPTA Feasibility Report, Volume 2, Annex 5 (ADB-TA 7954-IND)

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from the current WRD Schedule of Rates. The product of estimated quantities and these rates results in the base costs. To these base costs, physical and price contingencies (8%) and for various provisions (3%) was added in order to arrive at the financial costs. SCF of 0.86 for civil works and 0.95 for electro/mechanical components were applied to convert the base costs into economic costs. The central services tax was not included in the PWD Schedule of Rates and was not included as it is not applicable for civil works in the irrigation sector.

23. Base financial and economic investment costs for structures and works were estimated as described above. An annual maintenance budget of 2% of the investment costs was provided in the cost-benefit analysis; a major overhaul of the renovated and new structures was included after 20 years at one third of the investment cost.

24. For the rehabilitation or repairs of structures no land acquisition is required, as the structures already exist and are located on land owned by WRD. The proposed new structures are located in the riverbeds, which are uninhabited Government land. The re-sectioning of river embankments has been designed in such a way that no land acquisition is required as the works are all located on land already owned by WRD. Flume sections have been proposed in river stretches where not enough WRD land would be available for conventional bank strengthening. Some of the locations required for the construction of new structures and especially for the re-sectioning of the embankments appeared to be encroached. In these locations resettlement is required and surveys have been carried out in order to identify the families to be resettled and their entitlement. The resulting resettlement costs have been included in the project costs. Costs for environmental management and monitoring identified in the initial environmental examination (IEE) are also included.

13

IV. REHABILITATION OF STRUCTURES ANDRESECTIONING OF EMBANKMENTS

26. The structures in the rivers and canals in the project and their embankments were constructed up to 100 years ago or earlier. Detailed field surveys have been carried out together with the WRD to assess the state of the structures. It has been agreed that many of these old structures will be reconstructed or repaired as required. In addition a few new ones will be added. Extensive modelling work has established the need for strengthening of embankments and widening of sections to reduce the risk of flooding to floods above the 1:25 return period.

Adappar River A.

27. The Adappar River takes off from the Mullaiyar River on the left bank at the Addapar head sluice, then flows over 40 km east to reach the Bay of Bengal through the Adappar Straight Cut. The structural works to be undertaken is presented in Table 4.1. For flood protection there are river training works, bund strengthening, bed desilting and dredging works planned. The strengthened banks will be provided with an inspection road for easy access of the area and for the benefit of the inhabitants. The associated base costs are presented in Table 4.2. This river flows in the saline and tail-end productivity zones. Details of the financial and economic analysis at component level are provided in Appendix C. The EIRR is 10.2%.

Table 4.1. Structures on Adappar River

Regulators (head, cross and tail) 7 5 2

Irrigation Head Sluice 13 5 7 1 Drainage Sluice 15 5 4 3 3 Drainage Infall 25 1 7 11 6 Drainage Siphon 2 2 Road Bridge 12 12 Foot Bridge 1 1 Railway Bridge 1 1 Other structures 4 1 3 Abandoned structures 3 3 Total 83 18 18 17 30

Table 4.2. Summary of base costs for Adappar River (INR million)

Item Total Reconstructio

n Repairs New

Regulators (head, cross and tail) 250.310 116.791 133.519 Irrigation Head Sluice 63.750 30.553 33.198 Drainage Sluice 46.795 9.934 19.197 17.664 Drainage Infall 96.933 1.905 37.672 57.356 Drainage Siphon 26.228 26.228 Other structures 14.292 14.292 Sub-total Structures 498.308 185.410 90.066 222.831 Earth Works 1025.369 1,025.369 Additional costs 16.397 16.397 Resettlement 107.547 107.547 Environmental 7.988 7.988

14

Item Total Reconstructio

n Repairs New

Total base costs 1655.609 185.410 90.066 1380.132 Total ($ min) 25.471 2.852 1.386 21.233 Total Financial costs 1895.453 205.899 100.020 1589.534

Harichandra River B.

28. The Harichandra River starts at the Harichandranathi head sluice, where it takes off from the Koraiyar River and then flows east for 44 km to reach the Bay of Bengal through the Lawford Straight Cut from the Vedharanyam Canal. The works concern (i) the Harichandra head sluice that controls the inflow into the river, (ii) cross regulators that control the flow in the river, (iii) irrigation head sluices that control inflow of irrigation water into ayacuts on either side of the river, (iv) drainage sluices that prevent backflow or river water into the drainage areas at times of flood, (v) drain infalls into the river, and (vi) drainage siphons that carry drainage water under irrigation channels. The structural works to be undertaken is presented in Table 4.3. For flood protection there is bank strengthening and bed desilting planned for a stretch of 40 km. The strengthened banks will be provided with a road for easy access to the area and for the benefit of the inhabitants. In addition, bank protection and flume sections will be provided where necessary. The associated base costs are presented in Table 4.4. This river starts in the fresh groundwater zone, then flows in the saline and tail-end productivity zones. Details of the financial and economic analysis at component level are provided in Appendix D. The EIRR is 17.1%.

Table.4.3: Structures on Harichandra River

Structure Total Reconstruction Repairs New No work

Regulators (head, cross and tail) 7 2 4 1

Irrigation Head Sluice 59 32 18 2 7

Drainage Sluice 7 6 1

Drainage Infall 13 2 3 5 3

Drainage Siphon 8 5 1 2

Irrigation Siphon 1 1

Bed Dam 1 1

Grade Wall 4 2 2

Road Bridge 15 2 2 11

Foot Bridge 13 4 9

Railway Bridge 2 2

Other structures 4 4

Abandoned structures 5 5 Total 139 50 35 11 43

Table 4.4. Summary of base costs for Harichandra River (INR million)

Structure Total Reconstruction Repairs New

Regulators (head, cross and tail) 201.679 94.934 40.731 66.014 Irrigation Head Sluice 132.343 93.325 22.250 16.768 Drainage Sluice 22.758 19.258 3.501 Drainage Infall 65.202 19.866 15.913 29.422

15


Drainage Siphon 31.451 22.813 8.639 Irrigation Siphon 7.075 7.075 Bed Dam 2.293 2.293 Grade Wall 31.028 10.128 20.900 Road Bridge 28.371 25.404 2.967 Foot Bridge 4.747 4.747 Sub-total Structures 526.946 282.675 107.667 136.605 Earth Works 1,741.524 1,741.524 Additional costs 89.629 89.629 Resettlement 273.290 273.290

Environmental 8.751 8.751

Total base costs 2,640.141 282.675 107.667 2,249.799 Total ($ million) 40.618 4.349 1.656 34.612 Total Financial costs 2,990.365 313.912 119.565 2556.887

Vellaiyar River C.

29. The Vellaiyar River branches from the Vennar River at the left bank just upstream the Vellaiyar Head Regulator. The river flows east for 38 km and then flows into the Bay of Bengal through the Vellaiyar Straight Cut. The structural works to be undertaken is presented in Table 4.5 . For flood protection bed desilting and protection walls are planned. The associated base costs are presented in Table 4.6. This river flows across the fresh groundwater and saline productivity zones. Details of the financial and economic analysis at component level are provided in Appendix E. The EIRR is 20.2%.

Table 4.5. Structures on Vellaiyar River


Regulators (head, cross and tail) 5 2 2 1

Irrigation Head Sluice 36 17 19

Drainage Sluice 11 7 3 1

Drainage Infall 7 1 5 1

Drainage Siphon 4 3 1

Bed Dam/Grade Wall 7 6 1

Road bridge 13 1 12

Railway Bridge 1 1

Aqueduct 1 1

Total 85 30 32 9 14

Table 4.6. Summary of base costs for Vellaiyar River (INR million)


Regulators (head, cross and tail) 131.029 49.055 35.463 46.512 Irrigation Head Sluice 122.809 93.676 29.133 Drainage Sluice 49.669 33.436 3.825 12.407 Drainage Infall 68.707 5.567 63.140 Drainage Siphon 7.511 2.304 5.208 Irrigation Siphon 18.546 18.546

16


Bed Dam 36.067 27.599 8.468 Grade Wall 10.382 10.382 Sub-total Structures 444.722 197.017 117.178 130.527 Earth Works 1020.189 1,020.189 Additional costs 162.320 162.320 Resettlement 229.166 229.166


Total base costs 1864.284 197.017 117.178 1,550.089 Total ($ mln) 28.681 3.031 1.803 23.848 Total Financial costs 2333.292 218.788 130.127 1984.376

Pandavanar River D.

30. The Pandavanar River branches from the Vennar River at the left bank just upstream the Pandavayar Head Regulator. The river flows east for 39 km and then flows into the Vellaiyar River. Of the total of eh The structural works to be undertaken is presented inTable 4.7. For flood protection there are river training works, bund strengthening, bed desilting and works planned and a protection wall will be constructed. The strengthened banks will be provided with a road for easy access of the area and for the benefit of the inhabitants. The associated base costs are presented in Table 4.8. This river starts in the fresh groundwater zone, then flows in the saline and tail-end productivity zones. Details of the financial and economic analysis at component level are provided in Appendix F. The EIRR is 19.2%.

Table 4.7. Structures on Pandavanar River


Regulators (head, cross and tail) 6 6

Irrigation Head Sluice 51 19 27 5

Drainage Sluice 2 2

Drainage Infall 10 5 2 2

Bed Dam/Grade Wall 8 6 1 1

Road bridge 4 4

Foot over Bridge 3 3

Railway Bridge 1 1 Total 85 24 43 3 14

Table 4.8. Summary of base costs for Pandavanar River (INR million)


Regulators (head, cross and tail) 42.400 42.400 Irrigation Head Sluice 113.920 89.002 24.918 Drainage Infall 17.836 0.978 1.546 15.312 Bed Dam 33.790 19.067 14.723 Foot Bridge 11.263 11.263 Sub-total Structures 219.209 89.980 99.193 30.035 Earth Works 545.175 545.175 Additional costs 156.361 156.361 Resettlement 90.496 90.496

17



Total base costs 1,019.237 89.980 99.193 830.064 Total ($ mln) 16.987 1.384 1.526 12.770 Total Financial costs 1210.769 89.980 99.193 1021.596

Valavanar Drain E.

31. The Valavanar Drain starts at the Thiruthuraipoondi – Vedaranyam road and flows south over a length of 19.30 km and spills into the lagoon at Thondiyakadu Village and from there into the Palk Strait. The structural works to be undertaken is presented in Table 4.9. For flood protection bund strengthening/re-sectioning works are planned. The associated base costs are presented in Table 4.10. This drain flows in the saline and tail-end productivity zones. Details of the financial and economic analysis at component level are provided in Appendix G. The EIRR is negative as the only benefits consist of flood protection.

Table 4.9. Structures on Valavanar Drain


Regulators (head, cross and tail) 2 2

Pumping station intake 2 2

Drainage Sluice 2 2

Drainage Infall 4 1 3

Bed Dam 2 1 1

Road Bridge 5 5

Foot Bridge 1 1

Railway Bridge 1 1

Total 19 1 1 17

Table 4.10. Summary of base costs for Valavanar Drain (INR million)


Drainage Infall 23.767 23.767 Bed Dam 6.984 6.984 Sub-total Structures 30.751 6.984 23.767 Earth Works 362.843 362.843 Additional costs 14.286 14.286 Resettlement 1.461 1.461


Total base costs 416.396 6.984 409.413 Total ($ mln) 6.406 0.107 6.299 Total Financial costs 469.823 7.755 462.068

Vedharanyam Canal F.

32. The Vedharanyam canal runs parallel to the Bay of Bengal coast and links up to several rivers and drains. It is connected to the sea by a number of straight cuts. The structural works to be undertaken is presented in Table 4.11. For flood protection there are river training works, bund strengthening, bed desilting and dredging works planned. The strengthened banks will be

18

provided with an inspection road for easy access of the area and for the benefit of the inhabitants. The associated base costs are presented in Table 4.12. This canal is entirely located in the tail-end productivity zone. Details of the financial and economic analysis at component level are provided in Appendix H. The EIRR is 5.6% as there are only drainage and flood protection benefits.

Table 4.11. Structures on Vedharayam Canal


Irrigation Head Sluice 1 1

Drainage Sluice 12 7 5

Drainage Infall 11 1 10

Irrigation Siphon 1 1 Road Bridge 19 19

Foot Bridge 3 3

Abandoned structures 2 2

Total 49 8 1 40

Table 4.12. Summary of base costs for Vedheranyam Canal (INR million)


Irrigation Head Sluice 13.115 13.115 Drainage Sluice 57.378 57.378 Drainage Infall 18.033 18.033 Sub-total Structures 88.526 70.493 18.033 Earth Works 175.027 175.027 Additional costs 30.246 30.246 Resettlement 9.854 9.854 Environmental 8.110 8.110 Total base costs 311.764 70.493 241.271 Total ($ mln) 4.796 1.085 3.712 Total Financial costs 358.971 78.283 280.688

Cost Benefit Analysis G.

33. For the assessment of the economic feasibility an evaluation period of 35 years (2015–2050) was used. All existing infrastructure was considered as sunk costs. It was assumed that after 15 and 30 years the schemes would need an overhaul, costing one-third of the investment costs. It was further assumed that without repair or renovation the structures would cease to be operational after 5–10 years as the remaining life time of the irrigation and drainage structures that will be repaired or replaced by the project cannot be known exactly. A Monte Carlo simulation approach was used in combination with a triangular probability distribution of the years in which the schemes would fail in the without-project case. The NPV, calculated at a discount rate of 12%, of the with-project and the without-project scenarios was calculated and their difference yields the net benefit of the project. Financial and economic cost benefit analysis of the rehabilitation of structures and the re-sectioning of embankments was carried at component level for each river/drain/canal sub-project. These presentations follow the list of structures as mentioned in the WRD Component Registers. The analysis shows that the financial and economic feasibility of the individual structures varies widely, but that the overall

19

feasibility of all rivers/drains/canals, including flood protection works, is acceptable. A summary of base and financial costs for the rehabilitation of structures and re-sectioning of embankments is presented in Table 4.13, showing a total base cost with an equivalent of $122,959 million. The financial and economic indicators for each river/canal/drain are included in the sensitivity analysis presented in Table 6.1.

Table 4.13. Summary of base and financial costs for Rivers/Canal/Drains (INR million) Structure

Total Reconstruction Repairs New

Regulators (head, cross and tail) 625.418 260.779 118.594 246.045 Irrigation Head Sluice 445.937 319.670 109.499 16.768 Drainage Sluice 176.600 120.006 23.022 33.572 Drainage Infall 290.478 22.749 60.699 207.030 Drainage Siphon 65.191 51.344 13.847 Irrigation Siphon 25.622 25.622 Bed Dam 79.133 6.984 48.959 23.191 Grade Wall 41.410 20.510 20.900 Road Bridge 28.371 25.404 2.967 Foot Bridge 16.010 16.010 Other structures 14.292 14.292 Sub-total Structures 2,134.429 742.578 314.912 1,076.939 Earth Works 4,481.314 4,481.314 Total Works 6,004.703 742.578 314.912 4,947.213 Additional costs 320.874 320.874 Resettlement 1,640.555 89.980 99.193 1,451.382 Environmental 56.777 1.384 1.526 52.560 Total base cost 8,098.963 832.557 414.106 6,852.300

Total ($ mln) 122.959 12.809 6.371 102.473

Total Financial costs 9,258.673 914.618 448.906 7,895.149

20

V. PUMP IRRIGATION SCHEMES

Technical Feasibility A.

34. Ayakkarampulam Village in Nagapattinam District is located very close to the east coast (Bay of Bengal) and consists of sandy soil. The high level lands in this area could not be commanded by the Delta Irrigation System; farmers were forced to raise paddy only by utilizing the monsoon rains and pumping the drainage water at great expense. Around 1950, the Mirasdar of Thiru started a pump house by fixing diesel pumps to use the unutilized drainage water for irrigating his own lands. He also sold water to the ayacutdars in the nearby areas. Due to persistent representation from the public, the scheme was taken over by the government in 1955. This scheme provided the concept for starting similar schemes in the delta, which came into operation between 1951 and 1991. The locations of the 26 schemes that are still operational are shown in Figure 3.1.

35. The principle objective of the pumping schemes is to supply water for irrigating the high level command areas located on the sandy ridges in the delta. This objective is to be achieved by pumping the tail end river or drain water, which otherwise would go to waste into the sea. Pumping normally commences with the arrival of flow in the tail-end rivers and drains around the 15th of August, and ends around the 15th of February when the rivers and drains dry up. In the pumping schemes the pumped water is conveyed from the delivery sump through a main channel and is distributed to the fields through sluices and field outlets, or from field to field in some places. The designed time of pumping is 16 hours per day in two shifts of 8 hours each.

36. A typical pumping scheme comprises of an intake channel leading from the river or drain to the sump of the pump house, a pump house with several electrically powered pumps and a main distribution channel downstream of the pump house. Head sluices are used to draw water and field channels to supply water to the fields. In addition, there is an electrical sub-station (transformer) and staff quarters for the pump operator. At some locations, there is also a diversion structure across the drainage channel from which water is taken for the scheme.

37. The technical feasibility of the pumping schemes has been demonstrated over the last 20–60 years. Without these schemes, agriculture is virtually impossible on sandy ridges in the areas underlain by saline groundwater. With the pumping schemes, one crop of Samba rice can be grown, followed to some extent by summer pulses that use the residual soil moisture. This applies for all pumped schemes in Nagappattinam and Thiruvarur districts. In the schemes in Thanjavur District, fresh groundwater is available and can be used for irrigation. In the ayacuts in this district conjunctive use of surface water is practiced. Surface water here is supplied through the pumped irrigation schemes and groundwater from borewells, enabling cropping outside the surface irrigation season. Here Kuruvai and Thaladi paddy can be grown followed in summer by irrigated pulses.

38. The project envisages the renovation of the 13 irrigation pumping schemes. At present (2014), only 2,933 ha of the potential 3,714 ha are being irrigated because the motors and pumps installed in the schemes are only about 50% to 60% efficient, having served for more than 30 to 40 years. Spare parts are not available in the market. Since the schemes are located near to the sea, the pipes and other installations are affected by corrosion. In order to revamp the schemes to the designed state and bridge the ayacut gap, rehabilitation of the pumping schemes is necessary. Of the 13 schemes, 5 are located in the saline groundwater zone, the others are located in the tail-end zone.

21

39. As in the practice in Tamil Nadu for surface water irrigation, farmers are not charged fees for pumped irrigation; investments, O&M and power costs are absorbed by the government and the power utility, which are reimbursed by the tax payer. In case of groundwater irrigation, farmers invest themselves in the borewells and the distribution system, but do not pay for the power.

Cost Benefit Analysis B.

40. Based on the inventory by the WRD and on additional information supplied by the Lower Cauvery Circle Superintending Engineer’s Office in Thanjavur, the economic feasibility of the 13 pump irrigation schemes located in the project area of the Project was assessed. For this assessment the following assumptions/parameters were used:

(i) Crop water requirement of Samba paddy (m3/ha): 12,500 (1,250 mm)7 (ii) Effective rainfall (m3/ha): 4550 (455 mm, 80% exceedance)8 (iii) Irrigation efficiency (%): 709 (iv) Pump efficiency at Present (%): 5510 (v) Pump efficiency after Renovation (%): 75 (vi) Dynamic head factor: 1.1 (vii) Irrigation season (days): 150 (viii) Annual O&M (% of investment): 4 (ix) Economic power cost (INR/kWh): 10 (x) Opportunity cost capital (%): 12

41. For each scheme the quantity of water that has to be pumped for the present ayacut and for the full ayacut after renovation was calculated based on the crop water requirement for a Samba rice crop and on the irrigation efficiency. The minimum pumping capacity was calculated based on the annual water requirement, the static pumping head, the dynamic head factor (to allow for head losses in pipes and bends), the pumping efficiency (lower for the present old pumps than for the new pumps) and the number of pumping days per year. The required pumping capacity to be installed includes stand-by capacity and to facilitate repairs. The power requirement per year was calculated based on the minimum pumping capacity and the number of pumping hours per year. The economic power cost is then calculated, using an economic price of power.

42. Financial base investment costs were considered separately for civil works and for mechanical works (pumps and motors). Since operators nowadays have motorcycles, they no longer need on-site quarters, so the renovation costs for existing quarters have been excluded from the cost estimates, but an allowance of INR60,000 has been added to provide for a rest room for the operator. Submersible pumps have been considered for schemes where the pump houses are prone to flooding. To arrive at the total financial costs of the civil works these base costs have been increased by 11% (including 8% physical & price contingencies). The costs of the electrical components and the pumps are based on current quotations from reputable suppliers. New dedicated transformers have been included for all pumping stations to ensure a stable power supply. To arrive at the financial costs 12.5% Service Tax/VAT has been added for

7 See Table 5.2 of Appendix B to Main Report 8 80% exceedance: 455 mm, min 206 mm, mean 677, max 1154 (1981-2012) 9 Section 5.3 of Appendix B to Main Report 10 Estimate by pump experts

22

the electrical and mechanical components. For the pumps, 5% transport and installation charges have been added.

43. The economic assessment of the pumping schemes follows the same assumptions and framework as that of the analysis of structures, except it was assumed that without renovation the schemes would cease to operate after 3–7 years. A Monte Carlo simulation approach was used in combination with a triangular probability distribution of the years in which the schemes would fail in the without project case.

44. In the saline groundwater zone the cropping pattern depends totally on pumped surface water and, therefore, the SIFS-productivity level applies. If the pumping schemes ceased to operate, as is assumed in the without-project case, meaningful cropping would not be possible. Pumping schemes in the tail-end zone have been linked with the SITE productivity level. Tail-end pumping schemes are considered vulnerable to climate change because their waters intakes are not protected by tail end regulators.

45. Based on (i) the economic net crop benefits that apply to the conjunctive use (CUSE), surface water irrigation and tail-end production (SITE) zones and on (ii) the sizes of the ayacuts at present and after renovation, the crop net benefits with and without the project have been established for all schemes. The cost/benefit ratio is calculated as the present value of costs divided by the present value of the benefits. The internal rate of return is calculated over the net project cash flow. The base and financial cost along with the EIRR are presented in Table 5.1, including the effect of medium climate change. The total base costs amounts to $2.055 million. The EIRR of the combined schemes is 40%, with only the Velankanni scheme performing below the 12% threshold. For the medium climate change scenario, two schemes in the tail-end production zone would become unviable, and the combined EIRR drops to 34%. In case of severe climate change all 8 schemes in the tail-end zone would become unviable, and the combined EIRR declines to 29%. The feasibility analysis of the pumping schemes is presented in detail in Appendix B.

Table 5.1. Base and financial costs for pumping schemes, EIRR (INR million)

Scheme name

Civil works

Electricals Pumps Total base

Total Fin.

EIRR EIRR Medium

Climate Change

Pamanimullur 1.048 1.875 4.815 7.738 8.931 55% 55% Sekal 1.408 1.838 4.720 7.966 9.177 35% 35% Korukkai Thalaikkadu 1.141 2.053 5.000 8.194 9.452 28% 10% Umbalacheri 1.110 2.090 4.815 8.016 9.242 18% 4% Oradiyambalam 1.147 1.854 5.000 8.001 9.234 29% 12% Aymoor-I 1.048 1.820 4.815 7.684 8.870 33% 15% Aymoor-II 1.104 1.751 0.988 3.843 4.356 34% 17% Velankanni 1.525 1.786 1.349 4.659 5.287 9% -

Vilunthamavadi 1.526 2.147 3.019 6.691 7.656 infinitiv

e 62% Karayankadu 1.107 1.857 1.283 4.247 4.826 46% 46% Kela Thondiyakkadu 1.111 1.896 5.780 8.787 10.159 60% 60% Vanduvanchery 1.051 1.842 1.943 4.836 5.522 41% 17% Valavanar 1.958 1.670 12.008 15.636 18.162 186% 186% Increase after October 2014 6.306 9.480 21.506 37.292 42.937

Total 22.589 33.959 77.041

133.589 153.812 40% 34%

23

Scheme name

Civil works

Electricals Pumps Total base

Total Fin.

EIRR EIRR Medium

Climate Change

Total $ million 0.348 0.522 1.185 2.055 2.366

24

VI. SENSITIVITY AND POVERTY ANALYSIS

Sensitivity Analysis A.

46. Sensitivity analysis was undertaken at the sub-project and project level for (i) medium climate change, (ii) severe climate change, (iii) cost increase by 20%, (iv) benefit reduction by 20%, and (v) a combination of options (iii) and (iv) (Table 6.1). The analysis indicates that in the base case the overall FIRR and EIRR are above the threshold of 12% if seen as a package. Individual river/drain/canal sub-projects have returns below 12% and cannot be considered financially and economically feasible on their own. The same applies for certain components (especially the flood protection components) of sub-projects, but should be considered as an integral part of these sub-projects. The 13 pumping schemes are fully independent of each other and it could be decided not to invest in those with very low returns or high vulnerability to medium climate change (Table 6.1). The Monte Carlo analysis involved 10,000 iterations of the model to obtain the probability distribution of the EIRR and FIRR and also derived the mean, maximum, minimum and standard deviation for the three climate-scenarios. The 95% probability interval is defined as the mean + and - 2 times the standard deviation. It is concluded that the Project as a whole is economically feasible under base case conditions with a probability of 100% that the EIRR is above the 12% threshold. Under medium and severe climate change conditions the EIRR drops to 17.3% and 16.8% respectively. In case of cost overruns, lower than expected benefits and in case lower benefits are combined with higher costs, there is a 100% probability that the overall EIRR remains above the 12% threshold. The FIRR has a probability of 95.8% of being above 12% in the base case and a probability of 2.9% in the Medium Climate change case. In all other cases the FIRR is below 12%.

Table 6.1. Sensitivity analysis at Sub-project and at Project level

Cas

e

Sub-project

With-without project Financial With-without project Economic

NPV Costs @12%

NPV Net Benefits @12%

B/C @12%

FIRR NPV

@12% NPV Costs

@12%


B/C @12%

EIRR NPV

@12%

INR mln INR mln Ratio % INR mln INR mln INR mln Ratio % INR mln

Bas

e ca

se

Adappar 1,926 857 0.45 5.4% -1,069 1,661 1,351 0.81 10.2% -310

Harichandra 3,065 2,752 0.90 11.0% -313 2,645 4,480 1.69 17.1% 1,836

Vellaiyar 2,174 2,700 1.24 14.1% 526 1,835 4,085 2.23 20.2% 2,250

Pandavanar 1,172 1,350 1.15 13.3% 179 1,008 2,155 2.14 19.2% 1,147

Vallavanar Drain 489 71 0.14 - -418 420 82 0.20 - -338

Vedharanyan Canal 231 101 0.44 3.9% -130 199 110 0.55 5.6% -89

Pumping Schemes 237 588 2.48 29.6% 351 204 867 4.25 40.3% 663

Project 7,367 7,562 1.03 12.2% 195 6,310 11,779 1.87 18.3% 5,469

Minimum 11.5% 17.2%

Maximum 13.0% 19.8%

Standard deviation 0.2% 0.35%

95% lower limit 11.8% 17.6%

95% upper limit 12.7% 19.0%

Probability >12% 95.8% 100.0%

Med

ium

Clim

ate

chan

ge

Adappar 1,926 753 0.39 4.3% -1,173 1,661 1,149 0.69 8.8% -512

Harichandra 3,065 2,364 0.77 9.7% -700 2,645 3,740 1.41 15.3% 1,095

Vellaiyar 2,174 2,700 1.24 14.1% 526 1,835 4,085 2.23 20.2% 2,250

Pandavanar 1,172 1,290 1.10 12.9% 119 1,008 2,041 2.03 18.7% 1,034



Pumping Schemes 237 462 1.95 24.4% 225 204 667 3.27 34.0% 463

25

Cas

e

Sub-project


NPV Costs @12%


B/C @12%

FIRR NPV

@12% NPV Costs

@12%


B/C @12%

EIRR NPV

@12%


Project 7,367 6,978 0.95 11.5% -390 6,310 10,712 1.70 17.3% 4,402

Minimum 10.7% 15.0%

Maximum 12.2% 17.3%


95% lower limit 11.1% 16.6%

95% upper limit 11.9% 17.9%

Probability >12% 2.9% 100.0%

Sev

ere

Clim

ate

chan

ge

Adappar 1,926 720 0.37 4.0% -1,206 1,661 1,064 0.64 8.2% -597

Harichandra 3,065 2,234 0.73 9.2% -830 2,645 3,421 1.29 14.4% 776

Vellaiyar 2,174 2,700 1.24 14.1% 526 1,835 4,085 2.23 20.2% 2,250

Pandavanar 1,172 1,270 1.08 12.7% 99 1,008 1,994 1.98 18.4% 986



Pumping Schemes 237 408 1.72 21.4% 171 204 570 2.79 29.4% 366

Project 7,367 6,766 0.92 11.2% -602 6,310 10,238 1.62 16.8% 3,928

Minimum 10.5% 14.6%

Maximum 12.0% 17.0%


95% lower limit 10.8% 16.1%

95% upper limit 11.6% 17.4%

Probability >12% 0.1% 100%

Co

st in

crea

se 2

0%

Adappar 2,311 857 0.37 3.9% -1,454 1,993 1,351 0.68 8.7% -643

Harichandra 3,678 2,752 0.75 9.4% -926 3,174 4,480 1.41 15.3% 1,307

Vellaiyar 2,609 2,700 1.04 12.3% 91 2,202 4,085 1.86 18.1% 1,883

Pandavanar 1,406 1,350 0.96 11.6% -56 1,209 2,155 1.78 17.4% 946



Pumping Schemes 284 588 2.07 25.4% 304 245 867 3.54 35.2% 623

Project 8,802 7,562 0.86 10.6% -1,240 7,572 11,779 1.56 16.3% 4,207

Minimum 10.0% 15.3%

Maximum 11.3% 17.4%


95% lower limit 10.2% 15.7%

95% upper limit 10.9% 16.9%

Probability >12% 0% 100%

Ben

efit

red

uct

ion

20%

Adappar 1,926 714 0.37 3.9% -1,212 1,661 1,126 0.68 8.7% -535

Harichandra 3,065 2,293 0.75 9.4% -771 2,645 3,734 1.41 15.3% 1,089

Vellaiyar 2,174 2,250 1.04 12.3% 76 1,835 3,404 1.86 18.1% 1,569

Pandavanar 1,172 1,125 0.96 11.6% -46 1,008 1,795 1.78 17.4% 788



Pumping Schemes 237 490 2.07 25.4% 253 204 723 3.54 35.2% 519

Project 7,367 6,302 0.86 10.5% -1,066 6,310 9,816 1.56 16.3% 3,506

Minimum 9.9% 15.2%

Maximum 11.2% 17.5%


95% lower limit 10.2% 15.7%

95% upper limit 10.9% 16.9%


26

Cas

e

Sub-project


NPV Costs @12%


B/C @12%

FIRR NPV

@12% NPV Costs

@12%


B/C @12%

EIRR NPV

@12%


Co

st in

crea

se &

Ben

efit

red

uct

ion

20%

Adappar 2,311 714 0.31 2.6% -1,597 1,993 1,126 0.56 7.2% -868

Harichandra 3,678 2,293 0.62 7.9% -1,384 3,174 3,734 1.18 13.5% 560

Vellaiyar 2,609 2,250 0.86 10.6% -359 2,202 3,404 1.55 16.2% 1,202

Pandavanar 1,406 1,125 0.80 10.1% -281 1,209 1,795 1.49 15.6% 586



Pumping Schemes 284 490 1.72 21.6% 206 245 723 2.95 30.8% 478

Project 8,802 6,302 0.72 8.9% -2,500 7,572 9,816 1.30 14.5% 2,244

Minimum 8.4% 13.6%

Maximum 9.4% 15.5%


95% lower limit 8.6% 14.0%

95% upper limit 9.2% 15.0%


47. In Figure 6.1 the probability distributions of the EIRRs for the three climate change scenarios are presented, showing that in all cases the EIRR is above the 12% threshold.

Figure 6.1. Probability analysis of EIRR under Climate Change scenarios

48. In Figure 6.2 the probability distributions of the FIRRs for the three climate change scenarios are presented, showing that in the severe and medium climate change scenarios the FIRR is below the cut-off rate of 12%. In the No climate change scenario the FIRR is above the 12% cut-off rate with a probability of 96%.

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

15% 16% 17% 18% 19% 20%

Pro

bab

ility

EIRR

No CC

Medium CC

Severe CC

27

Figure 6.2. Probability analysis of FIRR under Climate Change scenarios

Distribution Analysis and Poverty Impact Ratio B.

49. A distribution analysis of the subproject costs and benefits was undertaken for the Project in order to determine the distribution of the benefits over the various stakeholder categories: farmers, marginal farmers (with less than 1 ha of land), hired labour/landless and the government/society, and to calculate the poverty impact ratio (PIR). For this analysis the methodology proposed in the Handbook for Integrating Poverty Impact Assessment in the Economic Analysis of Projects11 was used. In this analysis firstly the present value of the incremental benefits using financial prices. The financial benefits (gains) and costs (losses) expected to be generated by the subproject were distributed over the stakeholders, showing the net benefits accruing to each of these categories. Secondly the present value of the incremental benefits and project costs for each subproject were calculated over the same period with the same discount rate, using economic prices. The difference in economic and financial present values is due to the application of the shadow wage rate (SWR) and the standard conversion factor (SCF). The SWR is applied to labour and the SCF is used for the removal of duties and taxes. For own and hired labour for the incremental agricultural production the PVs of the SWRs have been calculated, using the labour requirements specified in the potential crop budgets. These values have been assigned to the respective categories, using the distribution as found during the socio-economic survey.12

50. Distribution analysis considers the distribution of net benefits among stakeholder categories (farmers, marginal farmers and hired labour/landless). The incremental project benefits from agriculture have been estimated. The results are presented in Table 6.3. It can be seen that the bulk of the net benefits go to the farmers (58%) and marginal farmers (42%). The Poverty Impact Ratio (PIR) is 26%, indicating that one quarter of the project benefits go to the poor (Table 6.4).

11 ADB. 2001. Handbook for Integrating Poverty Impact Assessment in the Economic Analysis of Projects. Economics and

Development Resource Center. Manila. 12 Appendix K of Main Report

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

10.0% 10.5% 11.0% 11.5% 12.0% 12.5% 13.0% 13.5%

Pro

bab

ility

FIRR

No CC

Medium CC

Severe CC

28

Table 6.3. Distribution Analysis (INR mln)

Financial Economic Difference Distribution of Project Effects /1

Present Present (Econ. minus Farmers (51%)

Marginal Farmers (38%) /2

Hired Labour/Landless

(11%) Govt./Economy

Value Value Financial) Fin.

Gain/Loss SWR effect

Fin. Gain/Loss

SWR effect

Fin. Gain/Loss

SWR effect

Fin. Gain/Loss

SCF/Tax effect

Incremental Benefits Incremental Benefits 8,457 13,173 4,717 4,886 90 3,571 67 19 4,541 Total Benefits 8,457 13,173 4,717 4,886 90 3,571 67 0 19 0 4,541

Costs Civil Infrastructure 8,272 6,659 -1,613 -1,613 -1,613 Social costs 313 260 -53 -53 -53 Resettlement 714 614 -100 -100 -100 Environment 83 72 -11 -11 -11 Total Costs 9,382 7,606 -1,776 0 0 0 0 0 0 -1,776 -1,776

Net Benefits -925 5,567 6,492 4,886 90 3,571 67 0 19 1,776 6,316 /1 Source: Appendix K of Main Report /2 With less than 1 ha

Table 6.4. Poverty Impact Analysis (INR mln)

Beneficiaries Farmers Marginal Farmers

Hired Lab/ Landless Govt./Economy Total

PV Economic - PV Financial 90 67 19 6,316 6,492 Financial Return 4,886 3,571 0 0 8,457 Net Benefits 4,976 3,638 19 6,316 14,949 Proportion of Poor (%) /1 51% 38% 11% Net Benefits to Poor 2,538 1,382 2 0 3,922 Poverty Impact Ratio 26%

/1 Source: Appendix K of Main Report

29

Appendix A. Feasibility Analysis of Pumped Irrigation Schemes

Crop budgets Paddy, all seasons (ha)

Present 2025

Unit CUSE GRWT SIFS SITE SIMC SISC CUSE GRWT SIFS SITE SIMC SISC

Yields

Main product kg 5,750 5,750 5,000 4,250 4,000 3,250 6,250 6,250 5,500 4,500 3,750 2,000

By-product kg 2,396 2,396 2,083 1,771 1,667 1,354 2,604 2,604 2,292 1,875 1,563 833

Inputs

Seed kg 60 60 60 60 60 60 60 60 60 60 60 60

NPK kg 518 518 450 383 360 293 563 563 495 405 338 180

Zinc sulphate kg 25 25 25 25 25 25 25 25 25 25 25 25

Gypsum kg 500 500 500 500 500 500 500 500 500 500 500 500

Bio-Pesticide INR 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250

Bio-Fertilisers packet 35 35 35 35 35 35 35 35 35 35 35 35

Tractor Hire ha 3 3 3 3 3 3 3 3 3 3 3 3

Combine Harvester

ha 3 3 3 3 3 3 3 3 3 3 3 3

Compost day 13 13 13 13 13 13 13 13 13 13 13 13

Male labour day 53 53 53 53 53 53 53 53 53 53 53 53

Female labour INR 98 98 98 98 98 98 98 98 98 98 98 98

Revenues INR 95,929 95,929 83,417 70,904 66,733 54,221 104,271 104,271 91,758 75,075 62,563 33,367

Main product INR 83,950 83,950 73,000 62,050 58,400 47,450 91,250 91,250 80,300 65,700 54,750 29,200

By-product INR 11,979 11,979 10,417 8,854 8,333 6,771 13,021 13,021 11,458 9,375 7,813 4,167

Costs INR 59,161 59,161 57,808 56,454 56,003 54,650 60,063 60,063 58,710 56,905 55,552 52,394

Seed INR 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800 1,800

NPK INR 10,376 10,376 9,023 7,669 7,218 5,865 11,278 11,278 9,925 8,120 6,767 3,609

Zinc sulphate INR 975 975 975 975 975 975 975 975 975 975 975 975

Gypsum INR 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000 1,000

30

Crop budgets Paddy, all seasons (ha)

Bio-Pesticide INR 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250 1,250

Bio-Fertilisers INR 210 210 210 210 210 210 210 210 210 210 210 210

Tractor Hire INR 2,600 2,600 2,600 2,600 2,600 2,600 2,600 2,600 2,600 2,600 2,600 2,600

Combine Harvester

INR 3,850 3,850 3,850 3,850 3,850 3,850 3,850 3,850 3,850 3,850 3,850 3,850

Compost INR 3,125 3,125 3,125 3,125 3,125 3,125 3,125 3,125 3,125 3,125 3,125 3,125

Male labour INR 18,375 18,375 18,375 18,375 18,375 18,375 18,375 18,375 18,375 18,375 18,375 18,375

Female labour INR 15,600 15,600 15,600 15,600 15,600 15,600 15,600 15,600 15,600 15,600 15,600 15,600

Net Benefits Fin.

INR 36,768 36,768 25,609 14,450 10,730 44,208 44,208 33,049 18,170 7,011

Net Benefits Econ. INR 58,545 58,545 43,678 28,810 23,854 8,987 73,413 73,413 63,501 38,722 18,898

Crop budgets Rice-following Black/Green Gram (ha)

Present 2025

Yield Unit CUSE GRWT SIFS SITE SIMC SISC CUSE GRWT SIFS SITE SIMC SISC

Main product kg 750 1,000

By-product INR 2,500 3,333

Inputs

Seed kg 25 25

DAP foliar kg 20 20

Pesticide INR 375 375

Sprayer INR 150 150

Male labour Day 15 15

Female labour Day 43 43

Revenues INR 53,250 71,000

Main product INR 53,250 71,000

Costs INR 14,950 14,950

Seed INR 1,875 1,875

DAP foliar INR 500 500

31

Crop budgets Rice-following Black/Green Gram (ha)

Pesticide INR 375 375

Sprayer INR 150 150

Male labour INR 5,250 5,250

Female labour INR 6,800 6,800

Net Benefits Fin. INR 38,300 56,050

Net Benefits Econ. INR 34,168 50,143

Crop budget irrigated Black/Green Gram (ha)

Present 2025

Yields Unit CUSE GRWT SIFS SITE SIMC SISC CUSE GRWT SIFS SITE SIMC SISC

Main product Kg 2,000 2,000 2,500 2,500

By-product INR 2,500 2,500 3,125 3,125

Inputs

Seed Kg 20 20 20 20

DAP Kg 78 78 98 98

Pesticide INR 875 875 875 875

Irrigation INR 1,250 1,250 1,250 1,250

Tractor ha 3 3 3 3

Compost T 13 13 13 13

Male labour Day 33 33 33 33

Female labour Day 98 98 98 98

Revenues INR 144,500 144,500 180,625 180,625

Main product INR 142,000 142,000 177,500 177,500

By-product INR 2,500 2,500 3,125 3,125

Costs INR 38,278 38,278 38,766 38,766

Seed INR 1,500 1,500 1,500 1,500

DAP INR 1,953 1,953 2,441 2,441


Irrigation INR 1,250 1,250 1,250 1,250

Tractor INR 2,600 2,600 2,600 2,600

32

Crop budget irrigated Black/Green Gram (ha)

Compost INR 3,125 3,125 3,125 3,125

Male labour INR 11,375 11,375 11,375 11,375

Female labour INR 15,600 15,600 15,600 15,600

Net Benefits Fin. INR 106,222 106,222 141,859 141,859

Net Benefits Econ. INR 93,881 93,881 126,456 126,456

Crop budget rice-following Gingelly (ha)

Present 2025


Main product Kg 625 625 625 875 875 875

By-product INR 1,250 1,250 1,250 1,250 1,250 1,250

Inputs

Seed Kg 5 5 5 5 5 5

NPK Kg 50 50 50 70 70 70

Manganese INR 200 200 200 200 200 200

Pesticide INR 250 250 250 250 250 250

Tractor ha 3 3 3 3 3 3

Compost T 13 13 13 13 13 13

Male labour Day 26 26 26 26 26 26

Female labour Day 50 50 50 50 50 50

Revenues INR 52,500 52,500 52,500 73,000 73,000 73,000

Main product INR 51,250 51,250 51,250 71,750 71,750 71,750

By-product INR 1,250 1,250 1,250 1,250 1,250 1,250

Costs INR 24,865 24,865 24,865 25,266 25,266 25,266

Seed INR 500 500 500 500 500 500

NPK INR 1,003 1,003 1,003 1,404 1,404 1,404

Manganese INR 200 200 200 200 200 200

Pesticide INR 250 250 250 250 250 250

Tractor INR 2,600 2,600 2,600 2,600 2,600 2,600

33

Crop budget rice-following Gingelly (ha)

Compost INR 3,125 3,125 3,125 3,125 3,125 3,125

Male labour INR 9,188 9,188 9,188 9,188 9,188 9,188

Female labour INR 8,000 8,000 8,000 8,000 8,000 8,000

Net Benefits Fin. INR 27,635 27,635 27,635 47,734 47,734 47,734

Net Benefits Econ. INR 23,424 23,424 23,424 41,874 41,874 41,874

Crop budget irrigated Gingelly (ha)

Present 2025


Main product kg 1,000 1,000 1,250 1,250

By-product INR 1,250 1,250 1,250 1,250

Inputs

Seed Kg 5 5 5 5

NPK Kg 100 100 125 125

Manganese INR 200 200 200 200


Tractor ha 3 3 3 3

Compost T 13 13 13 13


Female labour Day 50 50 50 50

Revenues INR 83,250 83,250 103,750 103,750

Main product INR 82,000 82,000 102,500 102,500

By-product INR 1,250 1,250 1,250 1,250

Costs INR 25,868 25,868 26,369 26,369

Seed INR 500 500 500 500

NPK INR 2,005 2,005 2,506 2,506

Manganese INR 200 200 200 200


Tractor INR 2,600 2,600 2,600 2,600

34

Crop budget irrigated Gingelly (ha)

Compost INR 3,125 3,125 3,125 3,125

Male labour INR 9,188 9,188 9,188 9,188




Crop budget sugarcane (ha)

Present 2050

Yield Unit CUSE GRWT SIFS SITE SIMC SISC CUSE GRWT SIFS SITE SIMC SISC

Main product 120 120 150 150

Inputs INR

Seed kg 12,700 12,700 12,700 12,700

NPK kg INR 461 461 577 577

Bio-Control ha 1,875 1,875 1,875 1,875

Tractor T 5 5 5 5

Compost Day 13 13 13 13


Female labour Day INR 225 225 225 225

Revenues INR 312,000 312,000 390,000 390,000

Main product INR 312,000 312,000 390,000 390,000

Costs INR 125,866 125,866 128,178 128,178

Seed INR 12,700 12,700 12,700 12,700

NPK INR 9,248 9,248 11,560 11,560

Pesticide INR 1,875 1,875 1,875 1,875

Tractor INR 5,460 5,460 5,460 5,460

Compost INR 3,125 3,125 3,125 3,125

Male labour INR 57,458 57,458 57,458 57,458


35

Crop budget sugarcane (ha)



36

Appendix B. Feasibility Analysis of Pumped Irrigation Schemes

B.1 Technical parameters Pumping Schemes

Name

Con-junctive use

Tail-end

Ayacut (Command area) Static lift

Water Requirement Pumping rate Canal capacity

Pumping time Minimum power rating

Present Renovation Present Renovation Present Renovation Present Renovation Present Renovation

(Y/N) (Y/N) (ac) (ha) (ac) (ha) (m) (m3/y) (l/s) (l/s) (cusec) (h/y) (h/d) (h/y) (h/d) (HP) (HP)

Pamanimullur N Y 651 260 740 296 4.5 2,955,583 3,361,714 456 519 19 1,550 10 1,763 12 54 46

Sekal N Y 360 144 397 159 3.5 1,635,429 1,802,151 252 278 11 1,407 9 1,551 10 23 22

Korukkai Thalaikk. Y N 499 200 584 234 4.5 2,266,431 2,652,529 350 409 15 1,482 10 1,735 12 41 37

Umbalacheri N Y 271 108 300 120 3.1 1,230,433 1,362,857 190 210 16 754 5 836 6 15 27

Oradiyambalam N Y 441 176 554 221 2.6 2,002,946 2,514,926 309 388 16 1,228 8 1,542 10 21 23

Aymoor-I N Y 641 256 717 287 2.9 2,909,927 3,257,229 449 503 16 1,784 12 1,997 13 34 25

Aymoor-II N Y 491 196 500 200 2.9 2,229,634 2,271,429 344 351 16 1,367 9 1,393 9 26 25

Velankanni N Y 0 0 60 24 5.3 454 272,571 0 42 2 2 0 1,337 9 0 6

Vilunthamavadi N Y 981 392 1,611 644 5.8 4,454,953 7,318,543 687 1,129 27 1,619 11 2,659 18 104 85

Karayankadu N Y 361 144 379 152 5.6 1,637,700 1,721,743 253 266 10 1,691 11 1,778 12 37 29

Kela Thondiyakkadu N Y 549 219 700 280 5.6 2,492,529 3,180,000 385 491 18 1,358 9 1,733 12 56 55

Vanduvanchery N Y 300 120 445 178 3.1 1,363,766 2,021,571 210 312 11 1,176 8 1,743 12 17 19

Valavanar N Y 1,791 716 2,300 920 7.3 8,134,440 10,446,981 1,255 1,612 40 1,995 13 2,562 17 241 160

Total 7,333 2,933 9,286 3,714 33,314,225 42,184,245 17,414 22,627 670 557

B.2 Financial and Economic analysis of Pumping Schemes

Name

Renovation costs With-without project Financial With-without project Economic

Civil works Electricals Pumps Total base Total Fin. Total Eco. NPV Costs NPV Net Benefits

B/C FIRR NPV NPV Costs NPV Net Benefits

B/C EIRR NPV

(INR) (INR) (INR) (INR) (INR) (INR) (@12%,INR) (@12%,INR) (@12%,ratio) (%) (@12%,INR) (@12%,INR) (@12%,INR) (@12%,ratio) (%) (@12%,INR)

Pamanimullur 1,048,057 1,874,883 4,815,411 7,738,351 8,931,227 7,372,641 14,147,548 64,611,958 4.57 44% 50,464,410 12,217,004 90,853,778 7.44 55% 78,636,774

Sekal 1,408,033 1,838,157 4,719,716 7,965,906 9,177,226 7,590,317 12,953,356 34,040,263 2.63 27% 21,086,907 10,987,730 48,035,567 4.37 35% 37,047,837

Korukkai Thalaikkadu 1,141,412 2,052,702 5,000,024 8,194,138 9,451,865 7,806,972 14,373,562 20,817,898 1.45 18% 6,444,336 12,336,113 34,920,731 2.83 28% 22,584,617

37

Name

Renovation costs With-without project Financial With-without project Economic

Civil works Electricals Pumps Total base Total Fin. Total Eco. NPV Costs NPV Net Benefits

B/C FIRR NPV NPV Costs NPV Net Benefits

B/C EIRR NPV

(INR) (INR) (INR) (INR) (INR) (INR) (@12%,INR) (@12%,INR) (@12%,ratio) (%) (@12%,INR) (@12%,INR) (@12%,INR) (@12%,ratio) (%) (@12%,INR)

Umbalacheri 1,109,967 2,090,282 4,815,411 8,015,660 9,242,302 7,636,910 12,921,063 10,378,306 0.80 9% -2,542,757 10,932,541 17,549,823 1.61 18% 6,617,281

Oradiyambalam 1,146,612 1,853,993 5,000,024 8,000,629 9,234,092 7,622,692 13,282,288 20,441,132 1.54 19% 7,158,844 11,286,325 33,977,088 3.01 29% 22,690,763

Aymoor-I 1,048,057 1,820,052 4,815,411 7,683,520 8,869,542 7,320,421 12,794,425 24,952,620 1.95 23% 12,158,195 10,875,605 42,127,325 3.87 33% 31,251,720

Aymoor-II 1,103,622 1,750,894 988,210 3,842,726 4,356,484 3,662,670 6,758,344 16,434,949 2.43 26% 9,676,605 5,898,951 28,185,496 4.78 34% 22,286,545

Velankanni 1,524,512 1,785,894 1,348,724 4,659,130 5,286,865 4,441,316 7,252,661 3,259,428 0.45 - -3,993,233 6,205,321 4,971,034 0.80 9% -1,234,287

Vilunthamavadi 1,525,502 2,146,672 3,018,544 6,690,718 7,655,878 6,376,165 19,047,292 66,104,831 3.47 78% 47,057,538 17,462,173 107,045,872 6.13 - 89,583,699

Karayankadu 1,106,727 1,857,470 1,282,819 4,247,016 4,825,995 4,047,716 7,637,945 31,640,648 4.14 38% 24,002,703 6,673,929 44,904,630 6.73 46% 38,230,701

Kela Thondiyakkadu 1,111,493 1,896,383 5,779,523 8,787,399 10,158,692 8,371,903 16,744,702 64,669,880 3.86 44% 47,925,178 14,531,494 89,924,042 6.19 60% 75,392,549

Vanduvanchery 1,051,167 1,841,645 1,943,139 4,835,951 5,522,368 4,608,460 8,566,657 17,617,981 2.06 27% 9,051,324 7,434,643 28,776,594 3.87 41% 21,341,951

Valavanar 1,958,013 1,670,222 12,007,747 15,635,982 18,162,492 14,896,612 35,279,751 213,087,182 6.04 86% 177,807,431 31,234,464 296,129,299 9.48 186% 264,894,835

Cost increase after October 2014 6,305,797 9,479,795 21,506,283 37,291,875 42,937,291 35,532,820

Total 22,588,971 33,959,043 77,040,986 133,589,000 153,812,319 127,287,617 236,836,078 588,057,076 2.48 30% 351,220,998 203,981,215 867,401,279 4.25 40% 663,420,064

38

Appendix C. Feasibility of Adappar Structures and Re-Sectioning

C.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No.

Distance from Head Location Name/Description

Design Discharge

Design Discharge

Head Sluice/ Cross Regulator

Irrigation Head Sluice

Drainage Sluice

Drain Infall

Drainage Siphon

Agreed Works

Conjunctive use

Tail End

Base cost

(km) Irrigation (m3/s)

Drainage (m3/s) Ayacut (ha)

Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha) Y/N Y/N

INR

1.

130.236 A/C Adappar Head Regulator 1.54 760 Reconstruction

N N 3,060,319

2.

130.409 L Kottor Drain #1 0.25 18 Reconstruction

N N 1,319,715

3.

130.434 R Kottor Drain #2 0.01 1 Reconstruction

N N 1,319,715

4.

130.766 L Kottor Drain #3 0.11 8 Reconstruction

N N 1,319,999

5.

130.772 A/C Road bridge No Work N N

6.

130.911 L B1 Manjakanni Voikal HS 0.03 17 Repairs N N 2,100,000

7.

131.181 A/C Managudi-Tiruthuraipoondi bridge

1.55 No work N N

7a A/C Water pipeline crossing No work N N

8.

131.521 R Therku Setti Drain 0.13 30 No work N N

9.

131.816 L Vadakku Sethu Kottur Drain

0.73 167 No work N N

10.

132.476 R Therku Sethi Kottur Drain 0.31 72 Reconstruction

N N 1,463,601

11.

132.496 L Kottur Vadigal 0.50 14 No work N N

12.

132.876 R Essankudi Vadigal 0.43 99 Reconstruction

N N 1,459,158

39

Serial No.


Design Discharge

Design Discharge



Drainage Sluice

Drain Infall

Drainage Siphon

Agreed Works

Conjunctive use

Tail End

Base cost



Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)


INR

13.

133.651 R Settiamullai Drain 1.37 85 Repairs N N 3,000,000

14.

133.661 L Solagapuram 0.53 122 Reconstruction

N N 1,319,999

15.

133.926 R Drainage Pump Station No work N N

16.

133.996 R Royanallur Kottagam Siphon

0.05 12 Reconstruction

N N 5,960,000

17.

134.006 L Ponnu Voikel Drain 6.07 1,658 New N N 2,708,039

18.

134.051 R B2 Keerakkular HS 0.27 135 Reconstruction

N N 1,580,818

19.

134.201 A/C Road bridge No work N N

20.

136.336 R B3 Kunnur Channel Head Sluice

0.52 260 Repairs N N 2,400,000

21.

136.354 L B4 Thiruvalanjuli Channel Head Sluice

0.52 260 Reconstruction

N N 3,392,405

22.

136.376 A/C Thiruvalanjuli Regulator 22.13 3,652 Reconstruction

N N 13,903,821

23.

136.379 L Pullithikudhi drain infall No work N N

24.

137.551 L Alivalam drain 2.29 206 New N N 1,318,377

25.

138.325 L Andankarai drain 2,170 New N N 1,723,025

26.

138.432 L Keeranthi drain infall no 1 0.85 46 New N N 1,318,377

27.

138.734 L Keeranthi drain infall no 2 0.62 41 New N N 2,708,039

28 139.592 L Keeranthi drain infall no 3 0.65 45 New N N 1,461,060

139.676 A/C Proposed new regulator no data New N N 17,505,039

40

Serial No.


Design Discharge

Design Discharge



Drainage Sluice

Drain Infall

Drainage Siphon

Agreed Works

Conjunctive use

Tail End

Base cost



Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)


INR

29 139.854 L Ambodoiyar open fall 2.21 195 No work N N

30 139.874 L Adandur drainage No work N N

30a 139.885 A/C Road bridge No work N N

30b 139.895 A/C Road bridge (old) No work N N

31 140.014 A/C SI Railway girder bridge No work N N

32 140.094 A/C Tiruvalanjuli drainage siphon

367 Reconstruction

N N 12,211,109

33 141.624 A/C Road Bridge No work N N

34 143.153 L Ambodiyarajan Surplus sluice

0.73 29 Repairs N N 6,100,000

35 143.233 R Kurumbal Kottagam Drainage

1.13 70 New N N 5,526,388

36 143.413 R Kunnar Vadigal 2.91 296 New N N 5,526,388

37 143.593 A/C Vellar dam (old) No work N N

38 143.983 R Kulayar drain 7.64 1,258 New N N 15,518,037

39 144.802 A/C Bridge No work N N

40 147.397 R Attakulam HS 202.35 202 Reconstruction

N N 5,398,110

41 147.397 R Pamani HS 151.76 152 No work N N

42 147.839 L Thiyagaraja Nallur HS 1.37 131 Reconstruction

N N 5,398,110

43 149.066 L Subedar Channel HS 0.22 117 Repairs N N 3,700,000

44 149.469 L North Rajan HS 1.81 911 Reconstruction

N N 5,398,110

45 149.469 R Mullar Channel HS 0.08 38 Repairs N N 3,700,000

47 149.469 R South Rajan Channel HS 2.21 1,125 Repairs N N 3,700,000

46 149.469 A/C Pamani Regulator and Bridge

2.73 2,071 Reconstruction

N N 22,833,279

47a 149.489 A/C ECR Road Bridge No work N N

41

Serial No.


Design Discharge

Design Discharge



Drainage Sluice

Drain Infall

Drainage Siphon

Agreed Works

Conjunctive use

Tail End

Base cost



Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)


INR

149.499 A/C Pamani WaterLine Bridge No work N N

48 149.791 L Kokaladi Kottagam Drain 2.38 220 Repairs N N 3,000,000

49 150.651 R Pamani Mullar #20 PS 0.40 299 New N N 4,003,844

50 150.872 R Pamani Drain #1 75 New N N 1,488,000

51 150.912 R Pamana Drain#2 75 New N N 1,488,000

52 151.770 L Korkkai PS #22 New N N 9,901,875

53 152.240 R Segal Kottogam Drain 3.61 414 New N Y 1,488,000

53a 152.350 A/C Thalakadu Road bridge No work N Y

54 152.627 A/C Thalakadu foot bridge No work N Y

55 156.067 R Umbalachery South Rajan HS

3.03 1,536 Repairs N Y 3,700,000

55a 156.077 A/C Thulaspuram Road Bridge No work N Y

56 156.087 L Umbalachery North Rajan HS

1.06 535 Repairs N Y 3,700,000

57 156.106 A/C Umbalachery TER 34.61 6,940 Reconstruction

N Y 36,100,000

58 156.862 R Surplus outlet 100 Repairs N Y 4,500,000

59 157.900 A/C Umbalachery road bridge No work N Y

59a 158.000 A/C Umbalachery road bridge (new)

No work N Y

60 160.087 R MaruduraJn Kanni Regulator

Reconstruction

N Y 5,017,856

61 163.808 R South Rajan Channel 7.11 648 No work N Y

62 163.310 L North Rajan Channel infall sluice

1322 1,322 New N Y 5,700,000

63 163.470 R Pokkuvoikkal infall & regulator

25.23 4,323 No work N Y

64 163.490 L Nallar Infall 22.40 1,181 No work N Y

65 163.634 R Drainage infall 40.00 40 Repairs N Y 3,600,000

42

Serial No.


Design Discharge

Design Discharge



Drainage Sluice

Drain Infall

Drainage Siphon

Agreed Works

Conjunctive use

Tail End

Base cost



Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)


INR



68 167.494 R Palayapokku Voikkal Infall 40.00 40 Repairs N Y 3,600,000


70 168.540 R Kallimadu drain 40.00 40 Repairs N Y 3,600,000

71 168.850 A/C Kallimadu road bridge No work N Y

71a 168.950 A/C New TER New N Y 75,000,000

72 169.025 J Junction V Canal No work N Y

ASC 01

170.00 Pillar drain 80 Repairs N Y 1,200,000

Earth Works Reach 1 River training works New 104,307,995

Bund strengthening New 99,923,594

Reach 2 River Training Works New 235,177,109

Inspection Track New 49,216,301

Desilting New 13,289,280

Reach 3 Dredging New 31,100,000

Regrading New 19,141,440

Bund strengthening New 86,300,000

Inspection Track New 71,942,422

Additional costs Foot bridge, ramp, crematoria

New 11,360,000

Resettlement costs New 107,546,978

Environmental costs New 7,987,727

Totals 388 1,693 13,423 5,420 3,078 12,533 379

43

C.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

river


Serial No.

Name/Description Base cost

Investment Financial

Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12

% FIRR NPV @12%

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%

INR INR INR INR INR Ratio % INR INR INR Ratio % INR

1. Adappar Head Regulator 3,060,319 3,398,509 2,922,718 3,630,382 - -3,630,382 3,136,268 - -3,136,268

2. Kottor Drain #1 1,319,715 1,465,554 1,260,376 1,565,546 313,310 0.20 -2% -1,252,236 1,352,467 291,379 0.22 -1% -1,061,088

3. Kottor Drain #2 1,319,715 1,465,554 1,260,376 1,565,546 13,435 0.01 - -1,552,111 1,352,467 12,495 0.01 - -1,339,972

4. Kottor Drain #3 1,319,999 1,465,870 1,260,648 1,565,883 138,311 0.09 - -1,427,572 1,352,758 128,630 0.10 - -1,224,128

5. Road bridge - -

6. B1 Manjakanni Voikal HS 2,100,000 2,332,067 2,005,578 2,491,179 2,731,117 1.10 13% 239,938 2,152,117 4,550,797 2.11 19% 2,398,680

7. Managudi-Tiruthuraipoondi bridge - -

7a Water pipeline crossing - -

8. Therku Setti Drain - -

9. Vadakku Sethu Kottur Drain - -

10. Therku Sethi Kottur Drain 1,463,601 1,625,341 1,397,793 1,736,235 1,240,148 0.71 9% -496,087 1,499,924 1,153,342 0.77 10% -346,582

11. Kottur Vadigal - -

12. Essankudi Vadigal 1,459,158 1,620,407 1,393,550 1,730,964 1,699,175 0.98 12% -31,788 1,495,370 1,580,239 1.06 13% 84,868

13. Settiamullai Drain 3,000,000 3,331,525 2,865,111 3,558,827 1,467,681 0.41 5% -2,091,147 3,074,452 1,364,948 0.44 5% -1,709,504

14. Solagapuram 1,319,999 1,465,870 1,260,648 1,565,883 2,105,668 1.34 15% 539,785 1,352,758 1,958,279 1.45 15% 605,521

15. Drainage Pump Station - -

16. Royanallur Kottagam Siphon 5,960,000 6,618,629 5,692,021 7,070,204 200,663 0.03 - -6,869,541 6,107,912 186,617 0.03 - -5,921,295

17. Ponnu Voikel Drain 2,708,039 3,007,300 2,586,278 3,212,481 28,564,227 8.89 37% 25,351,746 2,775,246 26,564,829 9.57 38% 23,789,584

18. B2 Keerakkular HS 1,580,818 1,755,511 1,509,740 1,875,286 21,957,918 11.71 41% 20,082,632 1,620,050 36,587,974 22.58 52% 34,967,923

19. Road bridge - -

20. B3 Kunnur Channel Head Sluice 2,400,000 2,665,220 2,292,089 2,847,062 42,341,256 14.87 45% 39,494,194 2,459,562 70,552,259 28.68 56% 68,092,698

44


Serial No.



Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12

% FIRR NPV @12%

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


21. B4 Thiruvalanjuli Channel Head Sluice 3,392,405 3,767,294 3,239,873 4,024,328 42,341,256 10.52 40% 38,316,928 3,476,596 70,552,259 20.29 50% 67,075,663

22. Thiruvalanjuli Regulator 13,903,821 15,440,307 13,278,664 16,493,767 - -16,493,767 14,248,879 - -14,248,879

23. Pullithikudhi drain infall - -

24. Alivalam drain 1,318,377 1,464,069 1,259,099 1,563,959 3,554,919 2.27 20% 1,990,960 1,351,096 3,306,087 2.45 21% 1,954,991

25. Andankarai drain 1,723,025 1,913,433 1,645,553 2,043,983 37,383,919 18.29 48% 35,339,936 1,765,786 34,767,173 19.69 50% 33,001,387

26. Keeranthi drain infall no 1 1,318,377 1,464,069 1,259,099 1,563,959 800,068 0.51 6% -763,891 1,351,096 744,066 0.55 7% -607,030

27. Keeranthi drain infall no 2 2,708,039 3,007,300 2,586,278 3,212,481 711,018 0.22 -1% -2,501,463 2,775,246 661,249 0.24 0% -2,113,996

28 Keeranthi drain infall no 3 1,461,060 1,622,520 1,395,367 1,733,221 766,653 0.44 5% -966,568 1,497,320 712,990 0.48 6% -784,331

Proposed new regulator 17,505,039 19,439,490 16,717,961 20,765,805 - -20,765,805 17,939,470 - -17,939,470

29 Ambodoiyar open fall - -

30 Adandur drainage - -

30a Road bridge - -

30b Road bridge (old) - -

31 SI Railway girder bridge - -

32 Tiruvalanjuli drainage siphon 12,211,109 13,560,536 11,662,061 14,485,743 6,329,233 0.44 5% -8,156,509 12,514,157 5,886,209 0.47 6% -6,627,949

33 Road Bridge - -

34 Ambodiyarajan Surplus sluice 6,100,000 6,774,100 5,825,726 7,236,282 494,854 0.07 - -6,741,429 6,251,386 460,215 0.07 - -5,791,171

35 Kurumbal Kottagam Drainage 5,526,388 6,137,099 5,277,905 6,555,820 1,212,761 0.18 -2% -5,343,059 5,663,539 1,127,872 0.20 -2% -4,535,667

36 Kunnar Vadigal 5,526,388 6,137,099 5,277,905 6,555,820 5,102,348 0.78 10% -1,453,472 5,663,539 4,745,201 0.84 10% -918,338

37 Vellar dam (old) - -

38 Kulayar drain 15,518,037 17,232,908 14,820,301 18,408,672 21,663,837 1.18 13% 3,255,164 15,903,156 20,147,442 1.27 14% 4,244,287

39 Bridge - -

45


Serial No.



Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12

% FIRR NPV @12%

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


40 Attakulam HS 5,398,110 5,994,646 5,155,395 6,403,648 32,914,918 5.14 30% 26,511,271 5,532,078 54,845,370 9.91 39% 49,313,292

41 Pamani HS - -

42 Thiyagaraja Nallur HS 5,398,110 5,994,646 5,155,395 6,403,648 21,263,346 3.32 24% 14,859,699 5,532,078 35,430,624 6.40 33% 29,898,546

43 Subedar Channel HS 3,700,000 4,108,880 3,533,637 4,389,220 18,958,407 4.32 27% 14,569,187 3,791,825 31,589,957 8.33 36% 27,798,133

44 North Rajan HS 5,398,110 5,994,646 5,155,395 6,403,648 148,223,676 23.15 52% 141,820,028 5,532,078 246,981,696 44.65 64% 241,449,618

45 Mullar Channel HS 3,700,000 4,108,880 3,533,637 4,389,220 6,252,777 1.42 15% 1,863,557 3,791,825 10,418,858 2.75 22% 6,627,034

47 South Rajan Channel HS 3,700,000 4,108,880 3,533,637 4,389,220 183,072,661 41.71 63% 178,683,440 3,791,825 305,049,756 80.45 76% 301,257,931

46 Pamani Regulator and Bridge 22,833,279 25,356,544 21,806,628 27,086,567 - -27,086,567 23,399,943 - -23,399,943

47a ECR Road Bridge - -

Pamani WaterLine Bridge - -

48 Kokaladi Kottagam Drain 3,000,000 3,331,525 2,865,111 3,558,827 3,790,375 1.07 13% 231,547 3,074,452 3,525,062 1.15 13% 450,609

49 Pamani Mullar #20 PS 4,003,844 4,446,302 3,823,819 4,749,663 5,158,327 1.09 13% 408,664 4,103,209 4,797,262 1.17 13% 694,053

50 Pamani Drain #1 1,488,000 1,652,436 1,421,095 1,765,178 1,291,821 0.73 9% -473,357 1,524,928 1,201,398 0.79 10% -323,530

51 Pamana Drain#2 1,488,000 1,652,436 1,421,095 1,765,178 1,291,821 0.73 9% -473,357 1,524,928 1,201,398 0.79 10% -323,530

52 Korkkai PS #22 9,901,875 10,996,113 9,456,657 11,746,355 - -11,746,355 10,147,614 - -10,147,614

53 Segal Kottogam Drain 1,488,000 1,652,436 1,421,095 1,765,178 7,137,913 4.04 27% 5,372,735 1,524,928 6,638,284 4.35 28% 5,113,356

53a Thalakadu Road bridge - -

54 Thalakadu foot bridge - -

55 Umbalachery South Rajan HS 3,700,000 4,108,880 3,533,637 4,389,220 100,073,217 22.80 52% 95,683,997 3,791,825 212,871,424 56.14 69% 209,079,599

55a Thulaspuram Road Bridge - -

56 Umbalachery North Rajan HS 3,700,000 4,108,880 3,533,637 4,389,220 34,851,437 7.94 36% 30,462,217 3,791,825 74,134,471 19.55 49% 70,342,647

57 Umbalachery TER 36,100,000 40,089,345 34,476,837 42,824,557 - -42,824,557 36,995,910 - -36,995,910

58 Surplus outlet 4,500,000 4,997,287 4,297,667 5,338,241 1,722,428 0.32 3% -3,615,813 4,611,679 1,601,864 0.35 3% -3,009,815

46


Serial No.



Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12

% FIRR NPV @12%

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


59 Umbalachery road bridge - -

59a Umbalachery road bridge (new) - -

60 MaruduraJn Kanni Regulator 5,017,856 5,572,370 4,792,238 5,952,561 - -5,952,561 5,142,386 - -5,142,386

61 South Rajan Channel - -

62 North Rajan Channel infall sluice 5,700,000 6,329,897 5,443,711 6,761,772 22,770,497 3.37 25% 16,008,724 5,841,459 21,176,640 3.63 25% 15,335,180

63 Pokkuvoikkal infall bridge &regulator - -

64 Nallar Infall - -

65 Drainage infall 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

66 Drainage infall 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

67 Drainage infall 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

68 Palayapokku Voikkal Infall 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

69 Drainage infall 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

70 Kallimadu drain 3,600,000 3,997,829 3,438,133 4,270,593 688,971 0.16 -4% -3,581,622 3,689,343 640,746 0.17 -3% -3,048,597

71 Kallimadu road bridge - -

71a New TER 75,000,000 83,288,114 71,627,778 88,970,686 - -88,970,686 76,861,309 - -76,861,309

72 Junction V Canal - -

ASC 01 Pillar drain 1,200,000 1,332,610 1,146,044 1,423,531 1,377,942 0.97 12% -45,589 1,229,781 1,281,491 1.04 12% 51,710

Earth Works

River training works

104,307,995 115,834,882 99,617,998 123,738,051

39,777,039 0.05 - -802,951,089

106,896,654

46,252,370 0.06 - -681,776,045 Bund strengthening 99,923,594 110,965,969 95,430,733 118,536,942

River Training Works 235,177,109 261,166,104 224,602,849 278,984,915 241,013,606

Inspection Track 49,216,301 54,655,105 47,003,391 58,384,107 50,437,725

Desilting 13,289,280 14,757,854 12,691,755 15,764,751 13,619,086

47


Serial No.



Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12

% FIRR NPV @12%

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


Dredging 31,100,000 34,536,805 29,701,652 36,893,178 31,871,823

Regrading 19,141,440 21,256,726 18,280,784 22,707,027 19,616,482

Bund strengthening 86,300,000 95,836,856 82,419,696 102,375,602 88,441,746

Inspection Track 71,942,422 79,892,648 68,707,678 85,343,555 73,727,850

Foot bridge, ramp, crematoria 11,360,000 12,615,373 10,849,221 13,476,093 - -13,476,093 11,641,926 - -11,641,926

Resettlement costs 107,546,978 119,431,800 102,711,348 106,635,535 - -106,635,535 91,706,560 - -91,706,560

Environmental costs 7,987,727 8,870,436 7,628,575 7,920,032 - -7,920,032 6,811,228 - -6,811,228 Cost increase after October 2014 427,142,110 473,077,135 525,356,029 451,806,185 501,734,466 - -501,734,466 469,205,277 -

Totals

1,655,608,595 1,838,566,893 1,581,167,528 1,882,042,471 857,196,203 0.46 5.36% -1,024,846,267 1,558,796,521 1,350,884,949 0.87 10.21% -310,315,016

48

Appendix D. Feasibility of Harichandra Structures and Re-Sectioning

D.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No.

Distance from Head

Location Name/Description


Drainage Sluice Drain Infall

Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost

(km) Ayacut (ha) Ayacut (ha)

Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

1. 121.142 A/C Harichandranathi Head Sluice 17534.601 Repairs Y N 494,147

2. 121.142 L Thenkovanur Drainage Sluice 113.717 113.717 Reconstruction Y N 2,125,963

3. 121.158 L Vennar Chittar Drainage Sluice 978.934 978.934 Reconstruction Y N 3,520,122

4. 121.335 L Kottagacheri Head Sluice No work Y N

5. 122.574 A/C Kottagacheri Drainage Siphon 161.874 161.874 Reconstruction Y N 3,108,274

6. 122.574 L Melanangai Voikal Drainage Sluice 96.315 96.315 Reconstruction Y N 1,729,087

7. 122.783 R Purakottagam Head Sluice 21.870 21.870 Reconstruction Y N 1,729,087

8. 122.847 L Vadakku Kottagam Head Sluice 5.660 5.660 Reconstruction Y N 1,746,585

9. 123.217 R Karuppattimoolai Head Sluice (or) Thiruvenduthurai Head Sluice 37.200 37.200

Reconstruction Y N 1,779,057

10. 123.217 A/C Thirurameswaram Drainage Siphon 109.625 109.625 Reconstruction Y N 3,288,957

11. 123.217 L Kilanangai Voikal Drainage Sluice 566.115 566.115 Reconstruction Y N 2,195,000

12. 123.233 A/C Alvankottagam Drainage Siphon 2.833 2.833 No work Y N

13. 123.314 L Anaikal Madai Head Sluice 20.639 20.639 No work Y N

14. 123.539 R Karupatti Moolai Madai Head Sluice 36.826 36.826 No work Y N

15. 124.344 R Kunniyur Keela Madagu Head Sluice 129.236 129.236

129.236 No work Y N

16. 124.392 R Kunniyur Peria Madagu Head Sluice 67.210 67.21 67.210 No work Y N

17. 124.521 R Veeraki Head Sluice (closed) No work Y N

18. 124.681 R Kunniyur Membalam Sluice 13.759 13.759 Reconstruction Y N 1,749,199

19. 124.939 A/C Kunniyur Vadukkucheri Aqueduct No work Y N

20. 123.746 A/C Thiruchittamutam Bridge (on Road of Athichapuram Koothanallur) Reconstruction Y N 3,691,026

49

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

21. 124.746 L Karuppattimoolai Drainage Infall 54.633 54.633 New Y N 1,749,199

22. 125.116 A/C Thiruchittamutam Drainage Siphon 51.395 51.395 Reconstruction Y N 3,954,833

23. 126.000 R Sendhamangalam Head Sluice 223.832 223.832 Repairs N N 1,181,110

24. 126.033 A/C Kunniyur Regulator 16786.800 Repairs N N 3,298,359

25. 123.097 R Sendamangalam Head Sluice (abandoned) No work N N

26. 126.097 A/C Pallivarthi Aqueduct No work N N

27. 126.097 L Athiveeraramanar Infall 39.659 39.659 Repairs N N 5,203,495

28a 126.741 Road over bridge Repairs N N

28b 126.741 A/C Foot bridge (RCC) (Palliviruthurai-Harichandra Rigth Bank) Repairs N N 1,500,000

29. 126.660 L Periyagudi Voikal Head Sluice 75.410 75.410 Repairs N N 994,822

30. 126.660 A/C Priyagudi bed dam Repairs N N 1,932,226

31. 127.819 R Irulneeki Head Sluice 163.372 163.372 Reconstruction N N 2,070,623

32. 128.060 A/C Irulneeki Grade Wall Repairs N N 4,458,002

33a 128.060 A/C Cart track bridge RCC Repairs N N 1,500,000

34. 128.060 L Nochiyadi Head Sluice 154.590 154.590 Reconstruction N N 2,070,623

35. A/C Nochiyadi Grade Wall Repairs N N 4,076,630

36. 129.154 A/C Road Bridge Repairs N N 2,500,000

37. 129.187 R Kariakothan Head Sluice 135.489 135.489 Reconstruction N N 1,910,997

38a Foot bridge No work N N

38. 130.586 R Vikrapandiam madai Head Sluice 9.712 9.712 Reconstruction N N 1,910,997

39. 130.925 A/C Kariyamangalam drainage Siphon 125.460 Repairs N N 7,279,977

40. 130.940 R Alathur Head Sluice 312.890 312.890 Reconstruction N N 2,070,623

40P 131.150 A/C Vikkrapandiyam Grade Wall New N N 9,954,764

41. 131.198 L Vikrapandian Drainage Sluice 125.000 125.000 Reconstruction N N 758,236

42. 131.214 L Athiveeraramanar Chitar Infall 1192.610 1192.610 New N N 5,729,141

43. 131.278 L Manjavadi Head Sluice 13.355 13.355 Reconstruction N N 1,910,997

44. 131.327 A/C Road Bridge No work N N

50

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

45. 131.938 L Komal Head Sluice 499.657 499.657 Reconstruction N N 2,070,623

46. 132.083 A/C Alathur Kotagam Irrigation Siphon 79.723 79.723 Reconstruction N N 5,962,351

47. 132.405 R Nandi Mangudi Head Sluice 102.710 102.710 Reconstruction N N 2,070,623

48. 133.579 R Alivalam Head Sluice 301.491 301.491 Reconstruction N N 2,070,623

48P Nanthimangudy Grade wall New N N 7,657,615

49. 133.772 R Poosalangudi Head Sluice 91.459 91.459 Repairs N N 868,563

50. 133.853 L Kaduguruttiar Infall (L/B) 2378.340 2378.340 New N N 5,745,251

51. 134.673 A/C Bridge (RCC) Andakarai to Munniyur No work N N

51a Road Over bridge No work N N

52. 135.474 R Keeranthi voikal Head Sluice 80.939 80.939 Reconstruction N N 1,910,997

53 137.600 A/C Andangarai Drainage Siphon 2170.420 Reconstruction N N 4,435,970

53a Road Over bridge No work N N

54. 136.910 L Komal Vadikal Drainage Infall 686.750 686.750 New N N 5,745,251

55. 137.600 R Keeranthi seed farm Head Sluice 80.000 80.000 Repairs N N 203,105

56. 137.537 R Ambodiar Head Sluice 4650.440 4650.440 Reconstruction N N 4,724,442

57. 137.537 R Ambodirajan Head Sluice 1360.670 1360.670 Reconstruction N N 4,724,442

58. 137.537 A/C Keeranthi Regulator 8724.780 Reconstruction N N 35,000,000

59. 137.537 A/C Adanur Drainage Siphon 1822.440 1822.440 Reconstruction N N 4,435,970

60. 137.730 R Kurumbal Head Sluice 163.220 163.220 Reconstruction N N 2,362,221

61. 137.730 R Karumbiyur Head Sluice 177.360 177.360 Reconstruction N N 2,362,221

62. 137.886 L Nattuvoikal Drainage Infall 1221.340 1221.340 Reconstruction N N 5,824,736

63. 138.469 A/C Railway Girder Bridge 73.630 No work N N

64. 138.479 L Vennar River Infall 604.600 604.600 Repairs N N 5,181,179

65. 138.690 A/C RCC slab bridge (Ponnirai-North Ponnirai) Reconstruction N N 17,717,021

66. 139.052 L Tholudur Head Sluice 26.260 26.260 Reconstruction N N 1,181,110

66a 139.373 L Irrigation Head Sluice 260.400 260.400 Reconstruction N N 1,181,110

67. 139.434 R Manali Head Sluice 150.750 150.750 Reconstruction N N 1,181,110

51

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

68. 139.383 R Sathangudi Head Sluice 160.600 160.600 Reconstruction N N 1,181,110

69. 139.434 R Palayangudi Head Sluice 134.530 134.530 Reconstruction N N 1,181,110

70. 139.897 R Kodivinayaganallur Head Sluice 957.880 957.880 Reconstruction N N 4,724,442

71. 140.358 R Sembiyavelur Head Sluice 115.140 115.140 Reconstruction N N 1,181,110

72. 140.447 A/C Alathambadi Regulator 6879.310 Repairs N N 5,181,179

73. 140.479 A/C Bridge cum Road No.10 No work N N

73a Road bridge No work N N

74. 142.107 R Old Nathapallam Head Sluice 209.270 209.270 No work N N

75. 143.045 A/C Tholuthur Harijan Colony Bridge

Repairs N N 500,000

76. 144.097 L Veerasolanar Drainage Infall 1345.980 1345.980 New N N 5,824,736

77. 144.117 L Solavadiar Drainage Infall 1933.990 1933.990 No work N N

78. 144.117 R New Nathapallam Head Sluice 161.600 161.600 Repairs N N 1,181,110

79. 144.117 A/C Nathapallam Road Bridge

No work N N

80. 144.237 L Puthur Head Sluice (abandoned) No Work N N

81. 144.840 R Sithaimur Head Sluice 32.720 32.720 Repairs N Y 203,105

81a Railway bridge under construction No work N Y

82. 144.840 R Sithaimur old Head Sluice (abandoned) No work N Y

83. 145.960 LB Puthur Head Sluice 119.580 119.580 Repairs N Y 203,105

84. 146.289 R A42 Puthur Head Sluice 42.200 42.200 Repairs N Y 203,105

85. 146.349 A/C Puthur Foot Bridge No work N Y

86. 147.353 R Pallavanar Head Sluice 1043.130 1043.130 Repairs N Y 2,861,094

87. 147.393 R Odacheri Head Sluice 122.410 122.410 Repairs N Y 1,335,500

88. 147.484 L Alangudi Head Sluice 116.350 116.350 Repairs N Y 459,608

89. 149.263 R Manakudi Head Sluice 84.440 84.440 Repairs N Y 1,368,811

90. 149.263 L Thenkarai Esanur Head Sluice 30.770 30.770 Reconstruction N Y 2,733,840

90a Drinking water pipeline bridge No work N Y

91. 149.464 L Venmanacheri Vadapathi Head Sl. 563.980 563.980 Repairs N Y 757,615

52

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

92. 149.464 A/C Alangudi Regulator/Bridge 4038.260 Repairs N Y 25,350,000

92a Road Bridge No work N Y

93. 150.429 A/C Manakudi Drainage Siphon

441.980 No work N Y

94. 150.830 L Sadayankkottagam Head Sluice 441.980 441.980 Repairs N Y 2,741,381

95. 151.252 A/C Manakudi Cart Bridge

No work N Y

96. 151.413 L Amarkonmoolai Head Sluice 29.490 29.490 Reconstruction N Y 2,737,466

97. 151.574 L Ekarajapuram Head Sluice 125.240 125.240 Repairs N Y 1,333,148

98. 151.574 L Seeravettanar Infall (ROB cum Regulator) 1269.770 1269.770 Reconstruction N Y 10,916,521

99. 151.604 A/C Foot Bridge (Manakudi-Amaranmoolai) Repairs N Y 500,000

100. 151.694 R Palluvanar Infall Sluice 1378.850 1378.850 Repairs N Y 3,025,495

101. 152.620 R Kadanthethi kottagam Head Sluice 56.160 56.160 Reconstruction N Y 2,814,458

102. 153.142 R Brinjumoolai kottagam Head Sluice 175.740 175.740 Repairs N Y 314,315

103. 153.142 L Brinjumoolai Vadapathy (or) Ekarajapuram Head Sluice 176.140 176.140 Reconstruction N Y 314,315

104. 153.342 A/C Foot Bridge (Thalanayar Brinjimoolai) No work N Y

105. 153.544 L Brinjimoolai Thenpathi Head Sluice 96.960 96.960 No work N Y

105a FOB/Cart bridge under construction No work N Y

106. 153.851 L Pumping Scheme No work N Y

107. 153.906 L A55 Tirumalan Head Sluice 100.600 100.600 Reconstruction N Y 2,739,700

108. 154.047 L Ramadevan Head Sluice 115.540 115.540 Repairs N Y 1,270,279

109. 154.067 R Periyavoikal Head Sluice 1951.720 1951.720 Reconstruction N Y 9,524,081

109a Open pipe No work N Y

110. 154.067 L Thalanayar Agraharam (or) Aladivoikal Head Sluice 241.590 241.590 Repairs N Y 1,270,279

111. 154.067 R Rajanvoikal Head Sluice 1047.980 1047.980 Reconstruction N Y 4,724,442

112. 154.107 A/C Brinjumoolai Tail End Regulator 4559.140 Reconstruction N Y 45,000,000

113. 154.677 A/C Thalanayar Road Bridge No work N Y

53

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

(Thirumalur-Thalanayar)

114a Foot bridge No work N Y

114. 154.932 A/C Foot Bridge (Thirumalur-Thalanayar) No work N Y

114b Foot bridge (wooden bridge) No work N Y

115. 158.692 A/C Mudaliappankandi foot bridge (Mudaliappankandi- Palayathankarai No work N Y

115a 159.970 L Irrigation Head Sluice 250.000 250.000 New N Y 7,065,000

115b 159.970 R Irrigation Head Sluice 600.000 600.000 New N Y 7,065,000

115c 160.020 A/C Proposed TER New N Y 55,630,000

116. 160.107 A/C Harichandranathi infall into Vedaranyam Canal No work N Y

LSC01 R/B Thalanthiravaal drainage Sluice Pipe culvert New N Y 2,950,000

LSC02 Bridge Good No work N Y

LSC03 Karapigai Drainage Sluice Reconstruction N Y 5,900,000

LSC04 L/B Pillar Drainage Infall No work N Y

LSC05 R/B Pillar Drainage Infall No work N Y

LSC06 Road Bridge No work N Y

LSC07 Sea Outfall No stucture N Y

Earth Works Reach 1

Bank strengthening km 121.284-126.100 New 8,801,430

Bed desilting km 121.284-126.152 New 674,370

Road construction km 121.284-126.152 New 43,464,686

Flume section 1500 m New 125,096,254

Reach2

Protection wall New 20,404,990

Bank strengthening km 126.150-137.760 New 192,805,300

54

Serial No.

Distance from Head




Drainage Siphon

Madai (Pond) Madagu

Agreed Works

Con-junctive use

Tail End

Base cost


Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha)

Ayacut (ha)

Ayacut (ha) Y/N Y/N

INR

Bed desilting km 126.150 - 137.760 New 2,926,080

Road construction km 126.150 - 137.760 New 97,592,845

Reach 3


Bank strengthening km 137.760 - 147.400 New 6,127,900



Flume section 1500 m New 245,727,453

Reach 4

Protection wall 2680 m New 200,729,070

Bank strengthening km 147.400 - 160.210 New 175,815,500


Bed dredging of Law Ford straight cut New 29,803,500


Additional costs Foot bridge, ramp, crematoria New 75,530,000



Totals 18,407 1,880 12,107 2,670 264 196

D.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

river


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%

FIRR NPV @12% NPV Costs

@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%

55


1. Harichandranathi Head Sluice 494,147 548,754 471,929 586,195 - -586,195 506,410 - -506,410

2. Thenkovanur Drainage Sluice 2,125,963 2,360,899 2,030,373 2,521,978 1,958,693 0.78 10% -563,285 2,178,724 1,821,592 0.84 10% -357,132

3. Vennar Chittar Drainage Sluice 3,520,122 3,909,124 3,361,847 4,175,836 16,861,432 4.04 27% 12,685,597 3,607,482 15,681,190 4.35 28% 12,073,707

4. Kottagacheri Head Sluice (not in use) - -

5. Kottagacheri Drainage Siphon 3,108,274 3,451,764 2,968,517 3,687,270 2,788,163 0.76 10% -899,107 3,185,413 2,593,001 0.81 10% -592,412

6. Melanangai Voikal Drainage Sluice 1,729,087 1,920,165 1,651,342 2,051,174 1,658,956 0.81 10% -392,218 1,771,999 1,542,835 0.87 11% -229,163

7. Purakottagam Head Sluice 1,729,087 1,920,165 1,651,342 2,051,174 8,543,400 4.17 27% 6,492,226 1,771,999 11,051,289 6.24 32% 9,279,291

8. Vadakku Kottagam Head Sluice 1,746,585 1,939,597 1,668,053 2,071,932 2,211,049 1.07 13% 139,118 1,789,931 2,860,096 1.60 16% 1,070,165

9. Karuppattimoolai Head Sluice (or) Thiruvenduthurai Head Sluice

1,779,057 1,975,657 1,699,065 2,110,452 14,531,983 6.89 34% 12,421,531 1,823,209 18,797,803 10.31 39% 16,974,594

10. Thirurameswaram Drainage Siphon 3,288,957 3,652,414 3,141,076 3,901,610 1,888,212 0.48 6% -2,013,399 3,370,581 1,756,043 0.52 6% -1,614,537

11. Kilanangai Voikal Drainage Sluice 2,195,000 2,437,565 2,096,306 2,603,875 9,750,923 3.74 26% 7,147,047 2,249,474 9,068,391 4.03 27% 6,818,917

12. Alvankottagam Drainage Siphon - -

13. Anaikal Madai Head Sluice - -

14. Karupatti Moolai Madai Head Sluice - -

15. Kunniyur Keela Madagu Head Sluice - -

16. Kunniyur Peria Madagu Head Sluice - -

17. Veeraki Head Sluice (closed) - -

18. Kunniyur Membalam Sluice 1,749,199 1,942,500 1,670,550 2,075,032 5,374,881 2.59 21% 3,299,848 1,792,610 6,952,661 3.88 26% 5,160,051

19. Kunniyur Vadukkucheri Aqueduct - -

20. Thiruchittamutam Bridge (on Road of Athichapuram Koothanallur)

3,691,026 4,098,915 3,525,067 4,378,575 - -4,378,575 3,782,628 - -3,782,628

21. Karuppattimoolai Drainage Infall 1,749,199 1,942,500 1,670,550 2,075,033 941,014 0.45 5% -1,134,019 1,792,610 875,146 0.49 6% -917,464

22. Thiruchittamutam Drainage Siphon 3,954,833 4,391,874 3,777,012 4,691,523 885,242 0.19 - -3,806,281 4,052,982 823,278 0.20 - -3,229,704

23. Sendhamangalam Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 36,409,251 25.99 54% 35,008,128 1,210,423 60,667,896 50.12 66% 59,457,473

24. Kunniyur Regulator 3,298,359 3,662,855 3,150,055 3,912,763 - -3,912,763 3,380,216 - -3,380,216

25. Sendamangalam Head Sluice (abandoned)

- -

26. Pallivarthi Aqueduct - -

27. Athiveeraramanar Infall 5,203,495 5,778,524 4,969,530 6,172,780 683,098 0.11 - -5,489,683 5,332,633 635,283 0.12 - -4,697,349

28a Road over bridge - -

28b Foot bridge (RCC) (Palliviruthurai-Harichandra Rigth Bank)

1,500,000 1,665,762 1,432,556 1,779,414 - -1,779,414 1,537,226 - -1,537,226

56


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


29. Periyagudi Voikal Head Sluice 994,822 1,104,758 950,092 1,180,133 12,266,439 10.39 39% 11,086,306 1,019,511 20,439,285 20.05 50% 19,419,774

30. Priyagudi bed dam 1,932,226 2,145,753 1,845,347 2,292,153 - -2,292,153 1,980,179 - -1,980,179

31. Irulneeki Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 26,574,628 10.82 40% 24,118,298 2,122,011 44,280,690 20.87 50% 42,158,679

32. Irulneeki Grade Wall 4,458,002 4,950,648 4,257,557 5,288,420 - -5,288,420 4,568,638 - -4,568,638

33a Cart track bridge RCC 1,500,000 1,665,762 1,432,556 1,779,414 - -1,779,414 1,537,226 - -1,537,226

34. Nochiyadi Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 25,146,119 10.24 39% 22,689,789 2,122,011 41,900,399 19.75 50% 39,778,388

35. Nochiyadi Grade Wall 4,076,630 4,527,131 3,893,333 4,836,008 - -4,836,008 4,177,802 - -4,177,802

36. Road Bridge 2,500,000 2,776,270 2,387,593 2,965,690 - -2,965,690 2,562,044 - -2,562,044

37. Kariakothan Head Sluice 1,910,997 2,122,178 1,825,073 2,266,969 22,039,087 9.72 38% 19,772,118 1,958,423 36,723,224 18.75 49% 34,764,801

38a Foot bridge - -

38. Vikrapandiam tank madai Head Sluice 1,910,997 2,122,178 1,825,073 2,266,969 - -2,266,969 1,958,423 - -1,958,423

39. Kariyamangalam drainage Siphon 7,279,977 8,084,474 6,952,648 8,636,061 - -8,636,061 7,460,648 - -7,460,648

40. Alathur Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 50,895,719 20.72 50% 48,439,388 2,122,011 84,806,364 39.97 62% 82,684,353

40P Vikkrapandiyam Grade Wall 9,954,764 11,054,847 9,507,168 11,809,096 - -11,809,096 10,201,816 - -10,201,816

41. Vikrapandian Drainage Sluice 758,236 842,027 724,143 899,477 2,153,035 2.39 21% 1,253,558 777,053 2,002,330 2.58 22% 1,225,276

42. Athiveeraramanar Chitar Infall 5,729,141 6,362,258 5,471,542 6,796,341 20,541,847 3.02 23% 13,745,506 5,871,324 19,103,988 3.25 24% 13,232,665

43. Manjavadi Head Sluice 1,910,997 2,122,178 1,825,073 2,266,969 2,172,368 0.96 12% -94,601 1,958,423 3,619,767 1.85 18% 1,661,344

44. Road Bridge - -

45. Komal Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 81,275,855 33.09 59% 78,819,524 2,122,011 135,428,084 63.82 71% 133,306,073

46. Alathur Kotagam Irrigation Siphon 5,962,351 6,621,240 5,694,266 7,072,993 1,373,171 0.19 - -5,699,822 6,110,321 1,277,054 0.21 - -4,833,267

47. Nandi Mangudi Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 16,707,147 6.80 33% 14,250,817 2,122,011 27,838,734 13.12 43% 25,716,723

48. Alivalam Head Sluice 2,070,623 2,299,444 1,977,522 2,456,330 49,041,520 19.97 50% 46,585,190 2,122,011 81,716,755 38.51 61% 79,594,744

48P Nanthimangudy Grade wall 7,657,615 8,503,844 7,313,306 9,084,043 - -9,084,043 7,847,658 - -7,847,658

49. Poosalangudi Head Sluice 868,563 964,546 829,510 1,030,355 14,877,022 14.44 44% 13,846,667 890,119 24,789,240 27.85 55% 23,899,121

50. Kaduguruttiar Infall (L/B) 5,745,251 6,380,148 5,486,927 6,815,452 40,965,191 6.01 32% 34,149,739 5,887,834 38,097,768 6.47 33% 32,209,935

51. Bridge (RCC) Andakarai to Munniyur - -

51a Road Over bridge - -

52. Keeranthi voikal Head Sluice 1,910,997 2,122,178 1,825,073 2,266,969 13,165,805 5.81 31% 10,898,835 1,958,423 21,937,877 11.20 41% 19,979,454

57


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


53 Andangarai Drainage Siphon 4,435,970 4,926,181 4,236,516 5,262,284 - -5,262,284 4,546,059 - -4,546,059

53a Road Over bridge - -

54. Komal Vadikal Drainage Infall 5,745,251 6,380,148 5,486,927 6,815,452 11,828,773 1.74 17% 5,013,321 5,887,834 11,000,800 1.87 18% 5,112,966

55. Keeranthi state seed farm Head Sluice 203,105 225,550 193,973 240,939 13,013,064 54.01 68% 12,772,125 208,146 21,683,368 104.17 82% 21,475,223

56. Ambodiar Head Sluice 4,724,442 5,246,531 4,512,017 5,604,491 756,455,902 134.97 88% 750,851,411 4,841,690 1,260,465,039 260.34 103% 1,255,623,348

57. Ambodirajan Head Sluice 4,724,442 5,246,531 4,512,017 5,604,491 221,331,068 39.49 62% 215,726,577 4,841,690 368,798,859 76.17 75% 363,957,168

58. Keeranthi Regulator 35,000,000 38,867,786 33,426,296 41,519,653 - -41,519,653 35,868,611 - -35,868,611

59. Adanur Drainage Siphon 4,435,970 4,926,181 4,236,516 5,262,284 31,390,215 5.97 32% 26,127,931 4,546,059 29,193,007 6.42 33% 24,646,948

60. Kurumbal Head Sluice 2,362,221 2,623,266 2,256,008 2,802,245 26,549,903 9.47 38% 23,747,658 2,420,845 44,239,492 18.27 48% 41,818,647

61. Karumbiyur Head Sluice 2,362,221 2,623,266 2,256,008 2,802,245 28,849,962 10.30 39% 26,047,717 2,420,845 48,072,027 19.86 50% 45,651,182

62. Nattuvoikal Drainage Infall 5,824,736 6,468,417 5,562,839 6,909,744 21,036,701 3.04 23% 14,126,957 5,969,291 19,564,204 3.28 24% 13,594,912

63. Railway Girder Bridge - -

64. Vennar River Infall 5,181,179 5,753,742 4,948,218 6,146,307 10,413,799 1.69 17% 4,267,492 5,309,763 9,684,869 1.82 18% 4,375,106

65. RCC slab bridge (Ponnirai-North Ponnirai)

17,717,021 19,674,896 16,920,411 21,017,273 - -21,017,273 18,156,712 - -18,156,712

66. Tholudur Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 4,271,538 3.05 23% 2,870,415 1,210,423 7,117,566 5.88 31% 5,907,143

66a Irrigation Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 42,357,522 30.23 57% 40,956,400 1,210,423 70,579,364 58.31 69% 69,368,941

67. Manali Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 24,521,492 17.50 48% 23,120,369 1,210,423 40,859,597 33.76 59% 39,649,174

68. Sathangudi Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 26,123,725 18.64 49% 24,722,603 1,210,423 43,529,362 35.96 60% 42,318,939

69. Palayangudi Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 21,883,093 15.62 46% 20,481,971 1,210,423 36,463,294 30.12 57% 35,252,872

70. Kodivinayaganallur Head Sluice 4,724,442 5,246,531 4,512,017 5,604,491 155,811,919 27.80 55% 150,207,428 4,841,690 259,625,810 53.62 68% 254,784,119

71. Sembiyavelur Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 18,729,052 13.37 43% 17,327,929 1,210,423 31,207,788 25.78 54% 29,997,365

72. Alathambadi Regulator 5,181,179 5,753,742 4,948,218 6,146,307 - -6,146,307 5,309,763 - -5,309,763

73. Bridge cum Road No.10 - -

73a Road bridge - -

74. Old Nathapallam Head Sluice - -

75. Tholuthur Harijan Colony Bridge 500,000 555,254 477,519 593,138 - -593,138 512,409 - -512,409

76. Veerasolanar Drainage Infall 5,824,736 6,468,417 5,562,839 6,909,744 23,183,535 3.36 24% 16,273,791 5,969,291 21,560,767 3.61 25% 15,591,475

58


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


77. Solavadiar Drainage Infall - -

78. New Nathapallam Head Sluice 1,181,110 1,311,633 1,128,004 1,401,123 26,286,389 18.76 49% 24,885,266 1,210,423 43,800,404 36.19 60% 42,589,981

79. Nathapallam Road Bridge - -

80. Puthur Head Sluice (abandoned) - -

81. Sithaimur Head Sluice 203,105 225,550 193,973 240,939 2,131,435 8.85 37% 1,890,496 208,146 4,533,896 21.78 51% 4,325,751

81a Railway bridge under construction -

82. Sithaimur old Head Sluice (abandoned) - -

83. Puthur Head Sluice 203,105 225,550 193,973 240,939 7,789,639 32.33 58% 7,548,700 208,146 16,569,784 79.61 76% 16,361,638

84. A42 Puthur Head Sluice 203,105 225,550 193,973 240,939 2,748,978 11.41 41% 2,508,039 208,146 5,847,507 28.09 56% 5,639,361

85. Puthur Foot Bridge - -

86. Pallavanar Head Sluice 2,861,094 3,177,268 2,732,451 3,394,047 67,951,215 20.02 50% 64,557,169 2,932,099 144,542,889 49.30 66% 141,610,790

87. Odacheri Head Sluice 1,335,500 1,483,083 1,275,452 1,584,271 7,973,990 5.03 29% 6,389,719 1,368,643 16,961,927 12.39 42% 15,593,284

88. Alangudi Head Sluice 459,608 510,399 438,943 545,222 7,579,232 13.90 44% 7,034,010 471,014 16,122,214 34.23 59% 15,651,200

89. Manakudi Head Sluice 1,368,811 1,520,076 1,307,265 1,623,787 5,500,561 3.39 25% 3,876,774 1,402,781 11,700,557 8.34 36% 10,297,775

90. Thenkarai Esanur Head Sluice 2,733,840 3,035,951 2,610,918 3,243,088 2,004,409 0.62 8% -1,238,679 2,801,687 4,263,692 1.52 16% 1,462,005

90a Drinking water pipeline bridge - -

91. Venmanacheri Vadapathi Head Sluice 757,615 841,337 723,550 898,740 36,738,591 40.88 63% 35,839,851 776,417 78,148,743 100.65 81% 77,372,326

92. Alangudi Regulator/Bridge 25,350,000 28,151,383 24,210,189 30,072,092 - -30,072,092 25,979,123 - -25,979,123

92a Road Bridge - -

93. Manakudi Drainage Siphon - -

94. Sadayankkottagam Head Sluice 2,741,381 3,044,326 2,618,121 3,252,034 28,791,309 8.85 37% 25,539,275 2,809,415 61,243,628 21.80 51% 58,434,213

95. Manakudi Cart Bridge - -

96. Amarkonmoolai Head Sluice (RM Sill) 2,737,466 3,039,979 2,614,382 3,247,390 1,921,027 0.59 7% -1,326,363 2,805,403 4,086,327 1.46 16% 1,280,923

97. Ekarajapuram Head Sluice 1,333,148 1,480,472 1,273,206 1,581,482 8,158,341 5.16 30% 6,576,859 1,366,234 17,354,070 12.70 42% 15,987,837

98. Seeravettanar Infall (ROB cum Regulator)

10,916,521 12,122,886 10,425,682 12,950,005 21,870,872 1.69 17% 8,920,868 11,187,441 20,339,986 1.82 18% 9,152,545

99. Foot Bridge (Manakudi-Amaranmoolai) 500,000 555,254 477,519 593,138 - -593,138 512,409 - -512,409

100. Palluvanar Infall Sluice 3,025,495 3,359,836 2,889,459 3,589,071 23,749,697 6.62 33% 20,160,626 3,100,580 22,087,300 7.12 34% 18,986,720

59


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


101. Kadanthethi kottagam Head Sluice 2,814,458 3,125,478 2,687,911 3,338,723 3,658,355 1.10 13% 319,632 2,884,305 7,781,896 2.70 22% 4,897,590

102. Brinjumoolai kottagam Head Sluice 314,315 349,049 300,182 372,864 11,447,995 30.70 57% 11,075,131 322,115 24,351,679 75.60 75% 24,029,564

103. Brinjumoolai Vadapathy (or) Ekarajapuram Head Sluice

314,315 349,049 300,182 372,864 11,474,051 30.77 57% 11,101,187 322,115 24,407,106 75.77 75% 24,084,991

104. Foot Bridge (Thalanayar Brinjimoolai) - -

105. Brinjimoolai Thenpathi Head Sluice - -

105a FOB/Cart bridge under construction - -

106. Pumping Scheme - -

107. A55 Tirumalan Head Sluice 2,739,700 3,042,459 2,616,515 3,250,040 6,553,251 2.02 19% 3,303,211 2,807,693 13,939,791 4.96 29% 11,132,099

108. Ramadevan Head Sluice 1,270,279 1,410,655 1,213,164 1,506,902 7,526,467 4.99 29% 6,019,565 1,301,804 16,009,975 12.30 42% 14,708,171

109. Periyavoikal Head Sluice 9,524,081 10,576,569 9,095,850 11,298,186 127,138,272 11.25 41% 115,840,086 9,760,444 270,443,039 27.71 55% 260,682,595

109a Open pipe - -

110. Thalanayar Agraharam (or) Aladivoikal Head Sluice

1,270,279 1,410,655 1,213,164 1,506,902 15,737,573 10.44 39% 14,230,671 1,301,804 33,476,284 25.72 54% 32,174,480

111. Rajanvoikal Head Sluice 4,724,442 5,246,531 4,512,017 5,604,491 68,267,152 12.18 42% 62,662,661 4,841,690 145,214,937 29.99 57% 140,373,246

112. Brinjumoolai Tail End Regulator 45,000,000 49,972,869 42,976,667 53,382,412 - -53,382,412 46,116,786 - -46,116,786

113. Thalanayar Road Bridge (Thirumalur-Thalanayar)

- -

114a Foot bridge - -

114. Foot Bridge (Thirumalur-Thalanayar) - -

114b Foot bridge (wooden bridge) - -

115. Mudaliappankandi foot bridge (Mudaliappankandi- Palayathankarai

- -

115a Irrigation Head Sluice 7,065,000 7,845,741 6,747,337 8,381,039 16,285,414 1.94 18% 7,904,375 7,240,336 34,641,629 4.78 29% 27,401,293

115b Irrigation Head Sluice 7,065,000 7,845,741 6,747,337 8,381,039 39,084,993 4.66 28% 30,703,955 7,240,336 83,139,909 11.48 41% 75,899,574

115c Proposed TER 55,630,000 61,777,570 53,128,710 65,992,523 - -65,992,523 57,010,595 - -57,010,595

116. Harichandranathi infall into Vedaranyam Canal

- -

LSC01 Thalanthiravaal drainage Sluice Pipe culvert

2,950,000 3,275,999 2,817,359 3,499,514 - -3,499,514 3,023,211 - -3,023,211

60


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


LSC02 Bridge - -

LSC03 Karapigai Drainage Sluice 5,900,000 6,551,998 5,634,719 6,999,027 - -6,999,027 6,046,423 - -6,046,423

LSC04 Pillar Drainage Infall - -

LSC05 Pillar Drainage Infall - -

LSC06 Road Bridge - -

LSC07 Sea Outfall - -

Earth Works

Bank strengthening km 121.284-126.100 8,801,430 9,774,060 8,405,692 10,440,923

305,058,269 0.18 - -1,435,889,166

9,019,859

354,718,917 0.24 - -

1,149,276,451

Bed desilting km 121.284-126.152 674,370 748,893 644,048 799,989 691,106

Road construction km 121.284-126.152 43,464,686 48,267,889 41,510,385 51,561,105 44,543,369

Flume section 1500 m 125,096,254 138,920,414 119,471,556 148,398,660 128,200,825

Protection wall 20,404,990 22,659,908 19,487,521 24,205,946 20,911,390

Bank strengthening km 126.150-137.760 192,805,300 214,111,863 184,136,203 228,720,263 197,590,237

Bed desilting km 126.150 - 137.760 2,926,080 3,249,436 2,794,515 3,471,138 2,998,698

Road construction km 126.150 - 137.760 97,592,845 108,377,653 93,204,782 115,772,031 100,014,851

Protection wall 47,800,000 53,082,291 45,650,770 56,703,984 48,986,274

Bank strengthening km 137.760 - 147.400

6,127,900 6,805,083 5,852,371 7,269,380 6,279,979

Bed desilting km 137.760 - 147.400 10,595,610 11,766,512 10,119,200 12,569,316 10,858,566


Flume section 1500 m 245,727,453 272,882,348 234,678,819 291,500,533 251,825,783

Protection wall 2680 m 200,729,070 222,911,275 191,703,696 238,120,040 205,710,655

Bank strengthening km 147.400 - 160.210

175,815,500 195,244,552 167,910,314 208,565,674 180,178,793

Bed desilting km 147.400 - 160.210 7,059,930 7,840,110 6,742,495 8,375,024 7,235,139

Bed dredging of Law Ford straight cut 29,803,500 33,097,031 28,463,446 35,355,171 30,543,147


Additional costs


61


Serial

No.



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


Resettlement costs 273,290,409 303,491,236 261,002,463 270,974,318 -270,974,318 233,037,913 -233,037,913

Environmental costs 8,750,719 9,717,745 8,357,261 8,676,558 -8,676,558 7,461,840 -7,461,840

Cost increase after October 2014 228,596,047 370,940,940 411,932,950 354,262,337 427,796,520

Totals

2,640,141,144 2,931,898,345 2,521,432,577 3,064,766,132 2,784,859,992 0.91 11% 147,890,380 2,276,975,060 4,518,461,363 1.98 17% 2,241,486,303

62

Appendix E. Feasibility of Vellaiyar Structures and Re-Sectioning

E.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No.

Distance from Head

Location Ayacut


Drainage Sluice

Drain Infall

Drainage Siphon Madagu

Agreed Works

Con-junctive use

Tail End Base cost

km (ha) Ayacut (ha) Catchment Area (ha)

Catchment Area (ha)

Catchment Area (ha) Ayacut (ha) Y/N Y/N INR

1 111.65 A/C Vellaiyar Head Regulator 10,920 Repairs Y N 5,508,999

1a 111.70 A/C Koradachery Bridge No work Y N

2 111.81 R Ayokudi Sluice 58 58 Reconstruction Y N 713,142

2a 111.86 A/C Ayokudi Grade Wall Repairs Y N 5,193,768

3 113.86 R Boodamangalam Sluice 53 53 Repairs Y N 1,461,540

4 114.06 R Vakranallur Head Sluice 107 107 Reconstruction Y N 2,125,185

4a 114.16 A/C Boodamangalam Bed Dam Repairs Y N 3,083,042

5 114.16 L Malu Radannllur Sluice 127 127 Reconstruction Y N 2,125,185

6 115.71 L Velkudi Sluice 104 104 Reconstruction Y N 2,125,185

7 116.52 R Neermangalam Sluice 64 64 Reconstruction Y N 2,125,185

7a 116.62 A/C Neermangalam Bed Dam Repairs Y N 1,461,540

8 118.53 L Akaravelkudi Sluice 75 75 Reconstruction N N 2,125,185

9 118.61 AC Bridge (under construction) No work N N

9a 118.61 A/C Temporary pipe culvert crossing No work N N

10 118.81 R Kannu Sluice 53 53 Reconstruction N N 2,125,185

11 119.29 L Kombur Sluice 107 107 Reconstruction N N 2,125,185

11a 119.68 A/C Kombur Bridge No work N N

12 120.10 R Poosangudi Sluice 156 156 Reconstruction N N 2,125,185

12a 120.10 A/C Kombur Bed Dam Repairs N N 4,257,231

13 121.51 L Ogaiperayur Sluice 97 97 Reconstruction N N 2,217,152

13a 121.51 A/C Ogaiperayur Bed Dam Repairs N N 2,596,914

63

Serial No.

Distance from Head

Location Ayacut


Drainage Sluice

Drain Infall


Agreed Works

Con-junctive use

Tail End Base cost


Catchment Area (ha)


14 122.75 R Old Annamarasanar Drainage Sluice New N N 5,277,481

14a 122.75 R Poosingudi Drainge Sluice #1 Reconstruction N N 2,157,225

15 123.68 L Nayarasankottayum Sluice 61 61 Repairs N N 632,410

16 125.23 L Ramanujamanali Drainage Sluice 25 25 Reconstruction N N 2,157,225

17 125.53 R Nauttu Voikal leading channel intake No work N N

17a 125.65 A/C Nattu Voikal Bed Dam New N N 4,235,955

18 125.55 R Poosangudi Drainage Sluice 119 119 Reconstruction N N 2,157,225

19 126.74 R Annamarasanar Drainage Infall 51 51 New N N 6,203,405

19a 126.74 R Nattu Voikal Surplus Sluice (on lead channel)

New N N 1,291,916

20 126.90 L Panayanur Drainage Infall 2,377 2,377 Repairs N N 2,785,026

21 127.20 R Nattu Voikal Head Sluice 720 720 Repairs N N 718,613

21a 128.14 A/C Athur Road Bridge No work N N

22 128.14 L Athur Drainage Sluice 81 81 Reconstruction N N 2,157,225

23 128.39 L Pandavanar surplus Drainage Sluice 376 376 New N N 6,206,769

24 128.75 L Radanallur Infall Sluice 81 81 New N N 5,277,481

25 128.95 L Veppathangudi Head Sluice 202 202 Repairs N N 313,948

26 129.55 A/C Pallavanur Cross Regulator 681 Repairs N N 6,983,996

27 129.57 R Pallavanur Sluice 681 681 Repairs N N 505,294

28 129.85 L Pandurayar Chittinar Infall 89 89 New N N 5,277,481

29 129.95 A/C Railway Bridge No work N N

30 130.96 L Andiyur Drainage Sluice 172 172 Reconstruction N N 1,215,813

31 132.69 A/C Bridge on Road No. 35 (L.F.) No work N N

32 131.92 R Kodialathur Channel Head Sluice 265 265 Repairs N N 485,099

33 132.71 L Marudur Sluice 110 110 Reconstruction N N 2,490,404

34 132.87 L Vellayar Chittiur Sluice 3,449 3,449 Repairs N N

35 133.35 AC Kooralathur channel Siphon Reconstruction N N 4,601,498

35a 133.75 A/C Mavvur Road Bridge No work N N

64

Serial No.

Distance from Head

Location Ayacut


Drainage Sluice

Drain Infall


Agreed Works

Con-junctive use

Tail End Base cost


Catchment Area (ha)


36 133.78 A/C Mavvur Cross Regulator 91 Reconstruction N N 12,038,692

37 134.80 A/C Thinikkarayal channel Siphon 70 70 Reconstruction N N 4,676,165

38 134.84 R Thirkkarnayal Drainage Sluice 224 224 Reconstruction N N 2,714,743

40 135.18 R Komal Drainage Sluice 132 132 Reconstruction N N 1,117,459

40A 135.15 A/C Thirukkaravasal Road Bridge No work N N

41 135.39 L Kovilpathu Sluice 174 174 Repairs N N 1,225,184

42 135.69 A/C Komal Siphon 61 Reconstruction N N 1,152,488

43 135.89 L Valivalum Sluice 201 201 Reconstruction N N 2,490,404

44 136.39 R Kulappadoo Sluice 206 206 Reconstruction N N 2,490,404

44A 137.24 A/C Kodaiyaalathiur Road Bridge No work N N

44AA 137.60 A/C Valivalam Cross Regulator 693 Repairs N 5,247,280

44B 138.80 R Thiruvoimur Head Sluice 450 450 Repairs N N 950,858

45 139.41 R Kurgudi Sluice 894 894 Repairs N N 1,197,740

46 139.51 A/C Bridge on Road No.65 No work N N

47 139.13 L Valivaulum Surplus Sluice/Escape 37 Repairs N N 728,398

47A 139.73 A/C Valivalam Road Bridge No work N N

47B 138.80 L Mutharasapuram Head Sluice 654 654 Reconstruction N 2,490,404

48 140.21 R Thinikkavalai Sluice 288 288 46,097,221 Repairs N N 1,042,411

49 140.48 R Kurambur channel Surplus Escape 303 Repairs N N 729,782

50 140.54 R Kurambur Sluice 35 35 Repairs N N 1,602,007

51 141.76 R Ettikudi Sluice 314 314 Reconstruction N N 2,506,323

52 141.90 R Kundiyar Sluice 73 73 Reconstruction N N 2,506,323

53 142.17 R Pandavaradai (eranur) Sluice 319 319 Reconstruction N N 2,506,323

53a 142.38 A/C Pandaravadai Bed Dam Repairs N N 2,407,579

53a 142.50 A/C Sundarapandiam Road Bridge No work N N

53b 142.89 A/C Water pipeline bridge No work N N

54 144.38 L Nattiruppu Sluice 25 25 Reconstruction N N 2,506,323

65

Serial No.

Distance from Head

Location Ayacut


Drainage Sluice

Drain Infall


Agreed Works

Con-junctive use

Tail End Base cost


Catchment Area (ha)


55 144.60 R Siravattanar Sluice 1,267 1,267 Repairs N N 2,249,951

56 144.78 R Melavalakkarai Sluice 97 97 Repairs N N 1,189,029

57 144.78 R Maduppurram (Thottivoikal) Head Sluice 224 224 Reconstruction N N 2,506,323

58 144.94 A/C Nattiruppu Drainage Siphon 49 49 No work N N

59 144.94 R Eravoikadu or Melavalakkarai Vadupatti Sluice

40 40 Repairs N N 999,798

60 144.98 R Kauverikindanur Sluice 1,711 1,711 Reconstruction N N 4,435,811

61 145.00 A/C Eruvoikadu TE regulator - Reconstruction N N 12,500,645

62 145.40 L Nattirippu Drainage Sluice 42 42 No work N N

63 145.44 L Mudiullanar Drainage Infall 1,474 1,474 New N N 8,257,695

64 147.01 L Muppattikottagam Drainage Sluice 66 66 Repairs N N 455,428

65 146.81 R Ramankttagam Drainage Sluice 24 24 Reconstruction N N 3,049,456

66 149.27 AC Muppathikotttagam Siphon 65 65 Repairs N N 2,605,087

67 149.35 L Pandavyar Eduyur Infall 7,145 7,145 No work N N

68 149.55 A/C New TER - New 23,267,327

Earth Works Reach 1 Desilting New 42,906,000

Protection walls New 107,916,259

Reach 2 Desilting New 41,536,000









Totals 34,083 13,461 1,260 11,217 183 46,097,221

66

E.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

river


Serial

No.

Base cost


Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


1 Vellaiyar Head Regulator 5,508,999 6,117,788 5,261,298 6,564,788 - -6,564,788 5,645,718 - -5,645,718

1a Koradachery Bridge - -

2 Ayokudi Sluice 713,142 791,950 681,077 849,814 22,605,642 26.60 55% 21,755,828 730,840 29,241,460 40.01 62% 28,510,620

2a Ayokudi Grade Wall 5,193,768 5,767,722 4,960,241 6,189,144 - -6,189,144 5,322,664 - -5,322,664

3 Boodamangalam Sluice 1,461,540 1,623,052 1,395,825 1,741,642 20,708,665 11.89 41% 18,967,024 1,497,812 26,787,631 17.88 48% 25,289,820

4 Vakranallur Head Sluice 2,125,185 2,360,035 2,029,630 2,532,473 41,733,493 16.48 47% 39,201,020 2,177,927 53,984,234 24.79 53% 51,806,308

4a Boodamangalam Bed Dam 3,083,042 3,423,743 2,944,419 3,673,901 - -3,673,901 3,159,555 - -3,159,555

5 Malu Radannllur Sluice 2,125,185 2,360,035 2,029,630 2,532,473 49,479,483 19.54 49% 46,947,010 2,177,927 64,004,036 29.39 56% 61,826,109

6 Velkudi Sluice 2,125,185 2,360,035 2,029,630 2,532,473 40,626,923 16.04 46% 38,094,450 2,177,927 52,552,834 24.13 53% 50,374,908

7 Neermangalam Sluice 2,125,185 2,360,035 2,029,630 2,532,473 24,976,863 9.86 39% 22,444,390 2,177,927 32,308,746 14.83 45% 30,130,820

7a Neermangalam Bed Dam 1,461,540 1,623,052 1,395,825 1,741,642 - -1,741,642 1,497,812 - -1,497,812

8 Akaravelkudi Sluice 2,125,185 2,360,035 2,029,630 2,532,473 12,243,381 4.83 29% 9,710,908 2,177,927 20,400,864 9.37 38% 18,222,937

9 Bridge (under construction) - -

9a Temporary pipe culvert crossing - -

10 Kannu Sluice 2,125,185 2,360,035 2,029,630 2,532,473 8,688,851 3.43 25% 6,156,378 2,177,927 14,478,033 6.65 33% 12,300,106

11 Kombur Sluice 2,125,185 2,360,035 2,029,630 2,532,473 17,377,703 6.86 34% 14,845,230 2,177,927 28,956,065 13.30 43% 26,778,139

11a Kombur Bridge - -

12 Poosangudi Sluice 2,125,185 2,360,035 2,029,630 2,532,473 25,342,483 10.01 39% 22,810,010 2,177,927 42,227,595 19.39 49% 40,049,669

12a Kombur Bed Dam 4,257,231 4,727,690 4,065,813 5,073,122 - -5,073,122 4,362,885 - -4,362,885

13 Ogaiperayur Sluice 2,217,152 2,462,165 2,117,462 2,642,065 15,797,911 5.98 32% 13,155,846 2,272,176 26,323,696 11.59 41% 24,051,520

13a Ogaiperayur Bed Dam 2,596,914 2,883,894 2,480,149 3,094,608 - -3,094,608 2,661,363 - -2,661,363

14 Old Annamarasanar Drainage Sluice 5,277,481 5,860,686 5,040,190 6,288,901 - -6,288,901 5,408,454 - -5,408,454

14a Poosingudi Drainge Sluice #1 2,157,225 2,395,616 2,060,230 2,570,653 - -2,570,653 2,210,762 - -2,210,762

15 Nayarasankottayum Sluice 632,410 702,297 603,975 753,610 9,873,695 13.10 43% 9,120,084 648,105 16,452,310 25.39 54% 15,804,205

16 Ramanujamanali Drainage Sluice 2,157,225 2,395,616 2,060,230 2,570,653 425,177 0.17 - -2,145,476 2,210,762 395,416 0.18 - -1,815,346

17 Nauttu Voikal leading channel intake - -

17a Nattu Voikal Bed Dam 4,235,955 4,704,062 4,045,493 5,047,768 - -5,047,768 4,341,080 - -4,341,080

67


Serial

No.

Base cost


Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


18 Poosangudi Drainage Sluice 2,157,225 2,395,616 2,060,230 2,570,653 2,049,214 0.80 10% -521,440 2,210,762 1,905,776 0.86 11% -304,986

19 Annamarasanar Drainage Infall 6,203,405 6,888,932 5,924,481 7,392,276 878,610 0.12 - -6,513,666 6,357,358 817,111 0.13 - -5,540,247

19a Nattu Voikal Surplus Sluice (on lead channel) 1,291,916 1,434,683 1,233,828 1,539,509 - -1,539,509 1,323,978 - -1,323,978

20 Panayanur Drainage Infall 2,785,026 3,092,794 2,659,803 3,318,771 40,942,452 12.34 42% 37,623,681 2,854,143 38,076,621 13.34 43% 35,222,478

21 Nattu Voikal Head Sluice 718,613 798,026 686,302 856,334 117,102,018 136.75 88% 116,245,684 736,448 195,124,395 264.95 104% 194,387,948

21a Athur Road Bridge - -

22 Athur Drainage Sluice 2,157,225 2,395,616 2,060,230 2,570,653 1,394,023 0.54 7% -1,176,631 2,210,762 1,296,446 0.59 7% -914,316

23 Pandavayar surplus Drainage Sluice 6,206,769 6,892,667 5,927,694 7,396,285 6,468,266 0.87 11% -928,018 6,360,805 6,015,510 0.95 11% -345,295

24 Radanallur Infall Sluice 5,277,481 5,860,686 5,040,190 6,288,901 1,394,023 0.22 - -4,894,878 5,408,454 1,296,446 0.24 0% -4,112,008

25 Veppathangudi Head Sluice 313,948 348,642 299,832 374,116 32,780,666 87.62 78% 32,406,550 321,740 54,621,669 169.77 93% 54,299,929

26 Pallavanur Cross Regulator 6,983,996 7,755,784 6,669,974 8,322,466 - -8,322,466 7,157,321 - -7,157,321

27 Pallavanur Sluice 505,294 561,133 482,575 602,133 110,827,384 184.06 95% 110,225,251 517,834 184,669,116 356.62 112% 184,151,282

28 Pandurayar Chittinar Infall 5,277,481 5,860,686 5,040,190 6,288,901 1,540,395 0.24 0% -4,748,505 5,408,454 1,432,573 0.26 1% -3,975,882

29 Railway Bridge - -

30 Andiyur Drainage Sluice 1,215,813 1,350,170 1,161,146 1,448,821 2,955,329 2.04 19% 1,506,507 1,245,986 2,748,466 2.21 20% 1,502,480

31 Bridge on Road No. 35 (L.F.) - -

32 Kodialathur Channel Head Sluice 485,099 538,707 463,288 578,068 43,180,958 74.70 75% 42,602,890 497,138 71,951,435 144.73 89% 71,454,297

33 Marudur Sluice 2,490,404 2,765,614 2,378,428 2,967,686 17,904,300 6.03 32% 14,936,614 2,552,210 29,833,522 11.69 41% 27,281,312

34 Vellayar Chittiur Sluice 561,089,154 - 561,089,154 934,929,929 - 934,929,929

35 Kooralathur channel Siphon 4,601,498 5,110,001 4,394,601 5,483,367 - -5,483,367 4,715,696 - -4,715,696

35a Mavvur Road Bridge - -

36 Mavvur Cross Regulator 12,038,692 13,369,066 11,497,396 14,345,885 - -14,345,885 12,337,461 - -12,337,461

37 Thinikkarayal channel Siphon 4,676,165 5,192,919 4,465,911 5,572,343 1,199,499 0.22 - -4,372,845 4,792,215 1,115,538 0.23 - -3,676,677

38 Thirkkarnayal Drainage Sluice 2,714,743 3,014,744 2,592,680 3,235,019 3,854,473 1.19 14% 619,455 2,782,116 3,584,673 1.29 14% 802,557

40 Komal Drainage Sluice 1,117,459 1,240,947 1,067,215 1,331,618 2,279,227 1.71 17% 947,610 1,145,191 2,119,689 1.85 18% 974,498

40A Thirukkaravasal Road Bridge - -

41 Kovilpathu Sluice 1,225,184 1,360,576 1,170,096 1,459,988 28,238,767 19.34 49% 26,778,779 1,255,589 47,053,606 37.48 61% 45,798,017

42 Komal Siphon 1,152,488 1,279,848 1,100,669 1,373,361 - -1,373,361 1,181,090 - -1,181,090

43 Valivalum Sluice 2,490,404 2,765,614 2,378,428 2,967,686 32,649,017 11.00 40% 29,681,331 2,552,210 54,402,305 21.32 51% 51,850,095

68


Serial

No.

Base cost


Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


44 Kulappadoo Sluice 2,490,404 2,765,614 2,378,428 2,967,686 33,438,913 11.27 41% 30,471,227 2,552,210 55,718,489 21.83 51% 53,166,280

44A Kodaiyaalathiur Road Bridge - -

44AA Valivalam Cross Regulator 5,247,280 5,827,148 5,011,347 6,252,912

44B Thiruvoimur Head Sluice 950,858 1,055,936 908,105 1,133,088 73,262,814 64.66 72% 72,129,726 974,456 122,076,139 125.28 86% 121,101,683

45 Kurgudi Sluice 1,197,740 1,330,100 1,143,886 1,427,285 145,406,610 101.88 81% 143,979,325 1,227,465 242,287,683 197.39 97% 241,060,218

46 Bridge on Road No.65 - -

47 Valivaulum Surplus Sluice/Escape 728,398 808,891 695,647 867,994 - -867,994 746,475 - -746,475

47A Valivalam Road Bridge - -

47B Mutharasapuram Head Sluice 2,490,404 2,765,614 2,378,428 2,967,686

48 Thinikkavalai Sluice 1,042,411 1,157,606 995,541 1,242,187 46,801,313 37.68 61% 45,559,125 1,068,281 77,983,949 73.00 74% 76,915,668

49 Kurambur channel Surplus Escape 729,782 810,429 696,969 869,644 - -869,644 747,894 - -747,894

50 Kurambur Sluice 1,602,007 1,779,042 1,529,976 1,909,029 5,621,644 2.94 23% 3,712,615 1,641,765 9,367,215 5.71 31% 7,725,450

51 Ettikudi Sluice 2,506,323 2,783,292 2,393,631 2,986,655 51,014,089 17.08 47% 48,027,434 2,568,523 85,003,601 33.09 59% 82,435,078

52 Kundiyar Sluice 2,506,323 2,783,292 2,393,631 2,986,655 11,914,258 3.99 27% 8,927,603 2,568,523 19,852,454 7.73 35% 17,283,931

53 Pandavaradai (eranur) Sluice 2,506,323 2,783,292 2,393,631 2,986,655 51,869,809 17.37 47% 48,883,154 2,568,523 86,429,468 33.65 59% 83,860,945

53a Pandaravadai Bed Dam 2,407,579 2,673,636 2,299,327 2,868,987 - -2,868,987 2,467,329 - -2,467,329

53a Sundarapandiam Road Bridge - -

53b Water pipeline bridge - -

54 Nattiruppu Sluice 2,506,323 2,783,292 2,393,631 2,986,655 4,146,952 1.39 15% 1,160,297 2,568,523 6,909,970 2.69 22% 4,341,447

55 Siravattanar Sluice 2,249,951 2,498,589 2,148,787 2,681,150 206,031,095 76.84 75% 203,349,944 2,305,789 343,304,866 148.89 90% 340,999,077

56 Melavalakkarai Sluice 1,189,029 1,320,427 1,135,567 1,416,904 15,797,911 11.15 41% 14,381,007 1,218,538 26,323,696 21.60 51% 25,105,158

57 Maduppurram (Thottivoikal) Head Sluice 2,506,323 2,783,292 2,393,631 2,986,655 36,466,846 12.21 42% 33,480,191 2,568,523 60,763,864 23.66 53% 58,195,341

58 Nattiruppu Drainage Siphon - -

59 Eravoikadu or Melavalakkarai Vadupatti Sluice 999,798 1,110,283 954,844 1,191,407 6,582,463 5.52 31% 5,391,056 1,024,610 10,968,207 10.70 40% 9,943,597

60 Kauverikindanur Sluice 4,435,811 4,926,004 4,236,364 5,285,926 278,372,364 52.66 68% 273,086,438 4,545,896 463,845,456 102.04 81% 459,299,560

61 Eruvoikadu TE regulator 12,500,645 13,882,069 11,938,579 14,896,371 - -14,896,371 12,810,879 - -12,810,879

62 Nattirippu Drainage Sluice - -

63 Mudiullanar Drainage Infall 8,257,695 9,170,237 7,886,404 9,840,267 25,385,157 2.58 22% 15,544,890 8,462,630 23,608,283 2.79 22% 15,145,653

69


Serial

No.

Base cost


Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


64 Muppattikottagam Drainage Sluice 455,428 505,756 434,951 542,710 1,136,129 2.09 19% 593,419 466,730 1,056,604 2.26 20% 589,873

65 Ramankttagam Drainage Sluice 3,049,456 3,386,446 2,912,343 3,633,878 418,207 0.12 - -3,215,672 3,125,135 388,934 0.12 - -2,736,202

66 Muppathikotttagam Siphon 2,605,087 2,892,971 2,487,955 3,104,347 1,123,023 0.36 3% -1,981,324 2,669,739 1,044,415 0.39 4% -1,625,324

67 Pandavyar Eduyur Infall - -

68 New TER 23,267,327 25,838,557 22,221,159 27,726,468 - -27,726,468 23,844,763 - -23,844,763

Earth Works Desilting 42,906,000 47,647,464 40,976,819 51,128,858

406,888,543 0.67 6%

355,759,685 43,970,818

406,888,543 0.78 8%

362,917,725

Protection walls 107,916,259 119,841,889 103,064,025 128,598,216 -128,598,216 110,594,466 -110,594,466

Desilting 41,536,000 46,126,068 39,668,418 49,496,300 -49,496,300 42,566,818 -42,566,818


Desilting 52,361,000 58,147,319 50,006,694 62,395,892 -62,395,892 53,660,467 -53,660,467


Desilting 63,209,000 70,194,112 60,366,936 75,322,891 -75,322,891 64,777,687 -64,777,687


Additional costs



Environmental costs 7,886,719 8,758,266 7,532,109 7,819,880 - -7,819,880 6,725,097 - -6,725,097

Cost increase after October 2014 839,600,500 813,215,859 903,082,866 776,651,265 969,067,218 - -969,067,218 806,560,166

Totals 1,864,283,59

1 2,070,302,184 1,780,459,878 2,174,130,559 2,700,286,185 1.24 14.2% 535,376,224 1,834,984,92

5 4,084,929,585 2.23 20.2% 2,249,944,660

70

Appendix F. Feasibility of Pandavanar Structures and Re-Sectioning

F.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No. location Name/Description Irrigation Head Sluice Drain Infall

Agreed Works

Conjunctive use Tail End

Base costs

km Ayacut (acres) Ayacut (ha) Ayacut (ha) Catchment (ha) Y/N Y/N

INR

1 107.83 A/C Pandavanar Head Regulator 21,015 8,504 Repairs Y N 3,862,000

1a A/C Road Bridge (Koradachery-Lakshmagudi)

No work Y N

2 109.44 L Neelanoor Head Sluice 321 130 130 Reconstruction Y N 1,250,000

2a A/C Foot Bridge No work Y N

3 111.04 L Musiriam Head Sluice 182 74 74 Reconstruction Y N 1,250,000

4 111.04 R Tittanimuttam Head Sluice 228 92 92 Reconstruction Y N 1,250,000

5 111.04 L Vidyapuram Head Sluice 283 115 115 Reconstruction Y N 1,250,000

6 111.04 R Althangudi Head Sluice 119 48 48 Reconstruction N N 1,250,000

6a A/C Bed Dam Repairs N N 1,510,000

6b A/C Foot Bridge No work N N

7 112.65 L Tirumathikunnann Head Sluice 745 301 301 Reconstruction N N 1,250,000

8 112.65 R Kavalugudy Head Sluice 118 48 48 Reconstruction N N 1,250,000

9 112.65 L Kankoduthavanitham Head Sluice

336 136 136 Reconstruction N N 1,250,000

10 112.65 L Therkusetti Head Sluice 328 133 133 Reconstruction N N 1,250,000


11 114.26 L Melaparthiyar Head Sluice 726 294 294 Repairs N N 500,000

11A A/C Melaparthiyar Bed Dam Repairs N N 910,000

12 114.26 R Tirumanjolai Head Sluice 135 55 55 Reconstruction N N 1,250,000

13 115.87 L Kilaparthiyur Head Sluice 451 183 183 Reconstruction N N 1,250,000


14 115.87 R Kudambnanyinarkoil Head Sluice 88 36 36 Reconstruction N N 1,250,000

71


Agreed Works


Base costs


INR

15 115.87 R Mulangudi Head Sluice 160 65 65 Reconstruction N N 1,250,000

16 115.87 L Mola Erukkalloor Head Sluice 189 76 76 Reconstruction N N 1,250,000

17 117.48 R Sittanakudi Head Sluice 191 77 77 Reconstruction N N 1,250,000

17A A/C Sittanakudi Bed Dam New N N 5,000,000

18 117.48 L Vaduvakudi Head Sluice 238 96 96 Reconstruction N N 1,250,000

19 117.48 L Kamlapuram Head Sluice 328 133 133 Reconstruction N N 1,250,000

20 117.48 R Venkaramperayoor Head Sluice 486 197 197 Reconstruction N N

20A A/c Eruppatter Bed Dam Repairs N N

21 119.09 L Ottanachikudi Head Sluice 134 54 54 Repairs N N 250,000

22 119.09 A/C Local Fund Road Bridge, Kamlapuram

15,240 No work N N

23 119.09 L Anakudi Head Sluice 184 74 74 Repairs N N 250,000

24 119.09 R Nochikudi Head Sluice 163 66 66 Repairs N N

25 119.09 L Kottarakudi Head Sluice 294 119 119 Repairs N N 500,000

26 120.70 L Manikandy Head Sluice 82 33 33 Reconstruction N N 1,250,000

26a R Karuppur Head Sluice 826 334 334 Repairs N N 1,120,000

27 120.70 R Arivaloor Head Sluice 313 127 127 Reconstruction N N 1,250,000

28 120.70 L Kalyanamabadavi Head Sluice 229 93 93 Repairs N N 1,250,000

29 R Poonthalangudi Head Sluice 231 93 93 Reconstruction N N 1,250,000

30 R Annavasal Head Sluice 113 46 46 Reconstruction N N 1,250,000

31 L Kilakuthangudi Head Sluice 322 130 130 Reconstruction N N 1,250,000

32 A/C Kalyanamahadevi Regulator 12385 4876 Repairs N N 3,275,000

33 R Chitdar Head Sluice 1,397 565 565 Repairs N N 250,000

34 123.92 R Senthannagudi Head Sluice 124 50 50 Repairs N N 250,000

35 123.92 L Naranamangalam Head Sluice 405 164 164 Reconstruction N N 1,250,000

35a A/C Naranamangalam Bed Dam Repairs N N 900,000

36 125.53 R Mangudi Head Slucie 500 202 202 No work N N

37 125.53 L Olani Head Sluice 219 89 89 Repairs N N 100,000

38 125.53 R Thirunaipur Head Sluice 863 349 349 Repairs N N 100,000

72


Agreed Works


Base costs


INR

39 125.53 A/C South Indian Railway Girder Bridge, M.M.

No work N N

39B Mangudi Head Sluice 500 196 196 Repairs N N

39A 125.53 A/C Mangudi Regulator Repairs N N 3,662,000

40 125.53 A/C Local Fund Road Bridge, No. 35 8,771 No work N N

41 125.53 L Thapplampaliyoor Head Sluice 1,025 415 415 Reconstruction N N 1,475,000

42 127.14 R Palaour Head Sluice 578 234 234 Repairs N N 1,250,000

43 127.14 R Maruvattur Head Sluice 247 100 100 Repairs N N 1,250,000

44 128.75 R Sigar Molasotti Head Sluice 798 323 323 Repairs N N 70,000

44a A/C Sigar Bed Dam No work N N

45 128.75 L Pichakalayar Head Sluice 1,342 543 543 Repairs N N 1,250,000

46 128.75 L Pudupattur (North Rajan) Head Sluice

Repairs N N

46A 130.36 R Southrajan Head Sluice 515 208 208 Repairs N N 72,000

47 130.36 L Manalur Head Sluice 297 120 120 No work N N

48 130.36 R Ydiayur Head Sluice 1,697 687 687 No work N N

48a 130.36 A/C Maruvathur regulator 1,697 687 Repairs N N 3,300,000

49 131.97 R Kudoor Pipe drainage No work N N

50 131.97 L Andakudi South setti Drainage Infall

371 150 150 Reconstruction N N

51 131.97 L Andakudi, North setti Drainage Infall

370 150 150 Reconstruction N N

51 A L Keele sethi Drainafe Infall Reconstruction N N 135,000

52 131.97 R Nagalur Head Sluice 211 85 85 Repairs N N

53 133.58 L Thirupanjanam South setti Drainage Infall

253 102 102 No Work N N

54 133.58 R Koilkannapur Setti Head Sluice 506 205 205 No work N N

55 133.58 R Manaloor setti Head Sluice 1,249 505 505 No work N N

55a A/C Foot Bridge No work N N

56 133.58 A/C Nagaloor Regulator 950 384 Repairs N N 3,825,000

73


Agreed Works


Base costs


INR

56A 135.18 L Thirupnjanam Surplus Infall No work N N

56B 136.79 L Piehamanglam drainage pipe Reconstruction N N

56C 136.79 R Thulasiapuram drainage-open infall

Reconstruction N N 135,000

56D 138.40 R Chinamangalur Open Infall Reconstruction N N 62,000

57 138.40 L Pichakalayar Surplus Infall 9 3 3 Repairs N N 525,000

58 138.40 L Kilukudi Drainage Infall 55 22 22 Repairs N N

59 140.01 A/C Local Fund Road Bridge, No. 65 No work N N

59A R Edayar Drainage Infall 3,600 1457 1457 New N N 2,600,000

60 143.23 R Elavanthodi Head Sluice 676 274 676 Repairs N Y

61 143.23 L Eruyangudi Head Sluice 491 199 491 Repairs N Y

62 143.23 A/C Erayangudi Regulator Nil Repairs N Y 300,000

62A L Old edayar Drainage Infall 1,500 607 607 New N Y 2,600,000

63 148.06 A/C Falls into the Vellayar - No structure N Y

Earth Works

Bank strengthening New 48,820,000

Bed desilting New 37,700,000

Road construction New 89,596,029


Additional costs

Foot bridge, ramp, crematoria New 53,100,000



Totals 88,399 11,462 9,665 2,492

74

F.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

river


Serial No. Name/Description Base costs


Investment Economic

NPV Costs @12%


B/C @12%


@12% NPV Net

Benefits @12% B/C

@12% EIRR NPV @12%


1 Pandavanar Head Regulator 3,862,000 4,288,783 3,688,353 4,602,145 - -4,602,145 3,957,845 - -3,957,845

1a Road Bridge (Koradachery-Lakshmagudi) - -

2 Neelanoor Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 50,744,166 34.07 59% 49,254,605 1,281,022 65,639,962 51.24 67% 64,358,941

2a Foot Bridge - -

3 Musiriam Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 28,770,835 19.31 49% 27,281,275 1,281,022 37,216,427 29.05 56% 35,935,406

4 Tittanimuttam Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 36,042,585 24.20 53% 34,553,025 1,281,022 46,622,777 36.39 60% 45,341,755

5 Vidyapuram Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 44,737,068 30.03 57% 43,247,508 1,281,022 57,869,500 45.17 64% 56,588,478

6 Althangudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 7,833,136 5.26 30% 6,343,576 1,281,022 13,052,174 10.19 39% 11,771,152

6a Bed Dam 1,510,000 1,676,867 1,442,106 1,799,389 - -1,799,389 1,547,474 - -1,547,474

6b Foot Bridge - -

7 Tirumathikunnann Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 49,039,381 32.92 59% 47,549,820 1,281,022 81,713,190 63.79 71% 80,432,168

8 Kavalugudy Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 7,767,311 5.21 30% 6,277,751 1,281,022 12,942,492 10.10 39% 11,661,470

9 Kankoduthavanitham Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 22,117,090 14.85 45% 20,627,530 1,281,022 36,853,197 28.77 56% 35,572,175

10 Therkusetti Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 21,590,492 14.49 45% 20,100,932 1,281,022 35,975,740 28.08 56% 34,694,718

10a Bed Dam 1,680,000 1,865,654 1,604,462 2,001,969 - -2,001,969 1,721,693 - -1,721,693

11 Melaparthiyar Head Sluice 500,000 555,254 477,519 595,824 47,788,712 80.21 76% 47,192,888 512,409 79,629,230 155.40 91% 79,116,821

11A Melaparthiyar Bed Dam 910,000 1,010,562 869,084 1,084,400 - -1,084,400 932,584 - -932,584

12 Tirumanjolai Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 8,886,331 5.97 32% 7,396,770 1,281,022 14,807,088 11.56 41% 13,526,066

13 Kilaparthiyur Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 29,686,927 19.93 50% 28,197,367 1,281,022 49,466,643 38.61 61% 48,185,621

13a Bed Dam 1,475,000 1,638,000 1,408,680 1,757,681 - -1,757,681 1,511,606 - -1,511,606

14 Kudambnanyinarkoil Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 5,792,571 3.89 26% 4,303,011 1,281,022 9,652,028 7.53 35% 8,371,006

15 Mulangudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 10,531,948 7.07 34% 9,042,387 1,281,022 17,549,142 13.70 44% 16,268,120

16 Mola Erukkalloor Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 12,440,863 8.35 36% 10,951,303 1,281,022 20,729,923 16.18 46% 19,448,902

17 Sittanakudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 12,572,512 8.44 36% 11,082,952 1,281,022 20,949,288 16.35 46% 19,668,266

17A Sittanakudi Bed Dam 5,000,000 5,552,541 4,775,185 5,958,241 - -5,958,241 5,124,087 - -5,124,087

75




Investment Economic

NPV Costs @12%


B/C @12%


@12% NPV Net

Benefits @12% B/C

@12% EIRR NPV @12%


18 Vaduvakudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 15,666,272 10.52 40% 14,176,712 1,281,022 26,104,348 20.38 50% 24,823,326

19 Kamlapuram Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 21,590,492 14.49 45% 20,100,932 1,281,022 35,975,740 28.08 56% 34,694,718

20 Venkaramperayoor Head Sluice 31,990,791 - 31,990,791 53,305,517 - 53,305,517

20A Eruppatter Bed Dam - -

21 Ottanachikudi Head Sluice 250,000 277,627 238,759 297,912 8,820,506 29.61 57% 8,522,594 256,204 14,697,406 57.37 69% 14,441,202

22 Local Fund Road Bridge, Kamlapuram - -

23 Anakudi Head Sluice 250,000 277,627 238,759 297,912 12,111,740 40.66 62% 11,813,828 256,204 20,181,513 78.77 76% 19,925,308

24 Nochikudi Head Sluice 10,729,422 - 10,729,422 17,878,188 - 17,878,188

25 Kottarakudi Head Sluice 500,000 555,254 477,519 595,824 19,352,454 32.48 58% 18,756,629 512,409 32,246,548 62.93 71% 31,734,139

26 Manikandy Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 5,397,623 3.62 25% 3,908,063 1,281,022 8,993,935 7.02 34% 7,712,913

26a Karuppur Head Sluice 1,120,000 1,243,769 1,069,641 1,334,646 54,371,179 40.74 63% 53,036,533 1,147,796 90,597,443 78.93 76% 89,449,647

27 Arivaloor Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 20,603,122 13.83 44% 19,113,562 1,281,022 34,330,508 26.80 55% 33,049,486

28 Kalyanamabadavi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 15,073,850 10.12 39% 13,584,290 1,281,022 25,117,209 19.61 49% 23,836,187

29 Poonthalangudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 15,205,499 10.21 39% 13,715,939 1,281,022 25,336,573 19.78 50% 24,055,551

30 Annavasal Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 7,438,188 4.99 29% 5,948,628 1,281,022 12,394,081 9.68 38% 11,113,059

31 Kilakuthangudi Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 21,195,544 14.23 44% 19,705,984 1,281,022 35,317,647 27.57 55% 34,036,625

32 Kalyanamahadevi Regulator 3,275,000 3,636,914 3,127,746 3,902,648 - -3,902,648 3,356,277 - -3,356,277

33 Chitdar Head Sluice 250,000 277,627 238,759 297,912 91,957,067 308.67 108% 91,659,155 256,204 153,225,942 598.06 126% 152,969,737

34 Senthannagudi Head Sluice 250,000 277,627 238,759 297,912 8,162,259 27.40 55% 7,864,347 256,204 13,600,585 53.08 68% 13,344,380

35 Naranamangalam Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 26,658,992 17.90 48% 25,169,432 1,281,022 44,421,264 34.68 59% 43,140,243

35a Naranamangalam Bed Dam 900,000 999,457 859,533 1,072,483 - -1,072,483 922,336 - -922,336

36 Mangudi Head Slucie - -

37 Olani Head Sluice 100,000 111,051 95,504 119,165 14,415,603 120.97 85% 14,296,438 102,482 24,020,387 234.39 101% 23,917,906

38 Thirunaipur Head Sluice 100,000 111,051 95,504 119,165 56,806,692 476.71 120% 56,687,527 102,482 94,655,682 923.63 139% 94,553,200

39 South Indian Railway Girder Bridge, M.M. - -

39B Mangudi Head Sluice 31,882,006 - 31,882,006 53,124,252 - 53,124,252

39A Mangudi Regulator 3,662,000 4,066,681 3,497,346 4,363,816 - -4,363,816 3,752,882 - -3,752,882

40 Local Fund Road Bridge, No. 35 - -

41 Thapplampaliyoor Head Sluice 1,475,000 1,638,000 1,408,680 1,757,681 67,470,289 38.39 61% 65,712,608 1,511,606 112,424,188 74.37 74% 110,912,582

76




Investment Economic

NPV Costs @12%


B/C @12%


@12% NPV Net

Benefits @12% B/C

@12% EIRR NPV @12%


42 Palaour Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 38,046,660 25.54 54% 36,557,100 1,281,022 63,396,274 49.49 66% 62,115,252

43 Maruvattur Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 16,258,694 10.92 40% 14,769,134 1,281,022 27,091,487 21.15 51% 25,810,465

44 Sigar Molasotti Head Sluice 70,000 77,736 66,853 83,415 52,528,088 629.72 128% 52,444,673 71,737 87,526,343 1,220.10 148% 87,454,606

44a Sigar Bed Dam - -

45 Pichakalayar Head Sluice 1,250,000 1,388,135 1,193,796 1,489,560 88,336,710 59.30 70% 86,847,150 1,281,022 147,193,424 114.90 84% 145,912,403

46 Pudupattur (North Rajan) Head Sluice - -

46A Southrajan Head Sluice 72,000 79,957 68,763 85,799 33,899,706 395.11 115% 33,813,907 73,787 56,486,299 765.53 133% 56,412,512

47 Manalur Head Sluice - -

48 Ydiayur Head Sluice - -

48a Maruvathur regulator 3,300,000 3,664,677 3,151,622 3,932,439 - -3,932,439 3,381,898 - -3,381,898

49 Kudoor Pipe drainage - -

50 Andakudi South setti Drainage Infall 2,583,642 - 2,583,642 2,402,796 - 2,402,796

51 Andakudi, North setti Drainage Infall 2,583,642 - 2,583,642 2,402,796 - 2,402,796

51 A Keele sethi Drainafe Infall 135,000 149,919 128,930 160,873 - -160,873 138,350 - -138,350

52 Nagalur Head Sluice 13,826,380 - 13,826,380 23,038,579 - 23,038,579

53 Thirupanjanam South setti Drainage Infall - -

54 Koilkannapur Setti Head Sluice - -

55 Manaloor setti Head Sluice - -

55a Foot Bridge - -

56 Nagaloor Regulator 3,825,000 4,247,694 3,653,017 4,558,054 - -4,558,054 3,919,927 - -3,919,927

56A Thirupnjanam Surplus Infall - -

56B Piehamanglam drainage pipe - -

56C Thulasiapuram drainage-open infall 135,000 149,919 128,930 160,873 - -160,873 138,350 - -138,350

56D Chinamangalur Open Infall 62,000 68,852 59,212 73,882 - -73,882 63,539 - -63,539

57 Pichakalayar Surplus Infall 525,000 583,017 501,394 625,615 59,246 0.09 - -566,369 538,029 55,099 0.10 - -482,930

58 Kilukudi Drainage Infall 383,357 - 383,357 356,523 - 356,523

59 Local Fund Road Bridge, No. 65 - -

77




Investment Economic

NPV Costs @12%


B/C @12%


@12% NPV Net

Benefits @12% B/C

@12% EIRR NPV @12%


59A Edayar Drainage Infall 2,600,000 2,887,321 2,483,096 3,098,285 25,092,428 8.10 36% 21,994,142 2,664,525 23,336,044 8.76 37% 20,671,518

60 Elavanthodi Head Sluice 44,035,759 - 44,035,759 93,670,964 - 93,670,964

61 Eruyangudi Head Sluice 31,984,553 - 31,984,553 68,036,159 - 68,036,159

62 Erayangudi Regulator 300,000 333,152 286,511 357,494 - -357,494 307,445 - -307,445

62A Old edayar Drainage Infall 2,600,000 2,887,321 2,483,096 3,098,285 10,455,178 3.37 25% 7,356,893 2,664,525 9,723,352 3.65 26% 7,058,826

63 Falls into the Vellayar - -

Earth Works

Bank strengthening 48,820,000 54,215,010 46,624,908 58,176,265

41,292,647 0.19 - -179,330,327

50,031,588

26,405,466 0.14 - -163,330,292

Bed desilting 37,700,000 41,866,159 36,004,896 44,925,137 38,635,618

Road construction 89,596,029 99,497,123 85,567,526 106,766,947 91,819,574

Protection wall 9,025,000 10,022,336 8,619,209 10,754,625 9,248,978

Additional costs


Resettlement costs 90,496,192 100,496,762 86,427,215 89,729,252 -89,729,252 77,167,156 - -77,167,156

Environmental costs 7,995,719 8,879,311 7,636,208 7,927,956 -7,927,956 6,818,043 - -6,818,043

Cost increase after October 2014 598,332,026 608,060,764 675,256,454 580,720,550 701,260,633 - -701,260,633 603,084,144

Totals 1,019,236,703 1,131,870,699 973,408,801 1,171,527,202 1,354,608,210 1.16 13.3% 183,081,008 1,007,513,394 2,159,739,362 2.14 19.2% 1,152,225,968

78

Appendix G. Feasibility of Valavanar Drain Structures and Re-Sectioning

G.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No.

Distance from Head (see Note 1) Location Name/Description

Irrigation Head Sluice Drain Infall

Drainage Siphon

Agreed Works


Base costs

(km)

Catchment or Ayacut (ac) Ayacut (ha)

Catchment Area (ha)


INR

1 A/C Thiruthuraipoondi-Vedaranyam Road bridge

No work N N

2 0.080 L Ariyalur Infall 504 204 204 No work N N

3 0.430 A/C ECR (By pass) Road Bridge No work N N

5 0.720 R Poonduveli Branch Infall No work N N

6 0.830 L Ayyanarukoilpathu Brach Infall No work N N

7 0.990 R Singalanthi Drain Infall No work N N

8 0.990 L Pamani Vadikal Infall 984 398 No work N N

9 L Ayyanarukoilpathu No work N N

10 R Poonduveli Branch Infall No work N N

11 2.290 A/C Railway Bridge No work N N

12 R Sothriam Vadikal No work N N

13 L Ayyanarukoilpathu No 2 No work N N

14 R Sothriam Vadikal No work N N 4,160,000

15 3.130 A/C Bed dam Reconstruction N N

16 L Puthur Pannai Drain No work N N

17 R Sothriam Vadikal No work N N

18 R Poonduveli Drain infall No work N N

19 R Nemam Vadikal 7341 2,971 No work N N

20 L Puthur Pannai Drain No work N N

21 4.370 A/C Pandi Bridge No work N N

22 R Karuveladi Vadikal 1097 444 No work N N

79

Serial No.



Drainage Siphon

Agreed Works


Base costs

(km)


Catchment Area (ha)


INR

23 R Pandi Vadikal No work N N

24 R Pandi Drain Infall No work N N

25 L Palavelikadalai Drain 284 115 No work N N

26 R Pandi Drain No work N N

27 R Keela Pandi Drain 327 131 No work N N

28 R Keela Pandi Drain No work N N

29 R Keela Pandi Drain No work N N

30 L Vadapathi Drain No work N N

31 L Vadapathi Drain No work N N

32 R Vinobakiramam Drain No work N N

33 6.370 A/C Temporary Foot Bridge No work N N

34 6.620 L Start of Pitchankottagam Drain No work N N

35 R Ekkal Vadikal 1120 453 No work N N

36 R Kadambavilagam Kanni 658 266 No work N N

37 L Melamaruthur Branch Drain 195 79 No work N N

38 8.300 Ekkal Road Bridge No work N N

39 R Kunnalur 2018 817 No work N N

40 L Melamaruthur Nadu Voikal No work N N

41 R Mariyar 1972 798 No work N N

42 R Odai Varigal 2528 1,023 No work N N

43 L Vanduvancheri Alam 5323 2,154 No work N N

45 R Vadi Voikal 1913 774 No work N N

46 L Thanoikkal 1008 408 No work N N 14,158,000

47 13.450 L Pitchankottagam Drain Infall & Bridge

New N N

48 13.550 L Varnduvancheri PS intake channel 445 180 No work N N

49 13.700 A/C Thulasiappattinam Bridge No work N N

50 R Valavanar Vadi Voikkal 657 266 No work N N

80

Serial No.



Drainage Siphon

Agreed Works


Base costs

(km)


Catchment Area (ha)


INR

51 L Vellodai 2010 813 No work N N

52 R Thondiyakkadu Vadigal 3126 1,265 No work N N

53 16.420 L Valavanar PS intake channel 2300 931 No work N N

54 16.450 A/C Karpaganathar-Killam Road Bridge/TER

2745 2,745 No work N Y

55 R Manavari Vadigal 1289 522 No work N Y

56 L Local Drain No work N Y

57 19.284 A/C Existing TER 4323 No work N Y

58 19.284 A/C Voimedu Vadigal Bed Dam 3548 No work N Y

59 Valavanar Straight Cut No work N Y 65,649,689

Earth Works Earth work for Standardization New 65,649,689

Formation of Road & Culvert New 8,510,000



Environmental costs New

Totals 47,714 1,315 13,902

G.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

drain

Serial

No. Name/Description Base costs


Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


1 Thiruthuraipoondi-Vedaranyam Road bridge - -

2 Ariyalur Infall - -

3 ECR (By pass) Road Bridge - -

5 Poonduveli Branch Infall - -

6 Ayyanarukoilpathu Brach Infall - -

81

Serial



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


7 Singalanthi Drain Infall - -

8 Pamani Vadikal Infall - -

9 Ayyanarukoilpathu - -

10 Poonduveli Branch Infall - -

11 Railway Bridge - -

12 Sothriam Vadikal - -

13 Ayyanarukoilpathu No 2 - -

14 Sothriam Vadikal 4,160,000 4,619,714 3,972,954 4,957,257 - -4,957,257 4,263,241 - -4,263,241

15 Bed dam - -

16 Puthur Pannai Drain - -

17 Sothriam Vadikal - -

18 Poonduveli Drain infall - -

19 Nemam Vadikal - -

20 Puthur Pannai Drain - -

21 Pandi Bridge - -

22 Karuveladi Vadikal - -

23 Pandi Vadikal - -

24 Pandi Drain Infall - -

25 Palavelikadalai Drain - -

26 Pandi Drain - -

27 Keela Pandi Drain - -



30 Vadapathi Drain - -

31 Vadapathi Drain - -

32 Vinobakiramam Drain - -

33 Temporary Foot Bridge - -

34 Start of Pitchankottagam Drain - -

35 Ekkal Vadikal - -

36 Kadambavilagam Kanni - -

82

Serial



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


37 Melamaruthur Branch Drain - -

38 Ekkal Road Bridge - -

39 Kunnalur - -

40 Melamaruthur Nadu Voikal - -

41 Mariyar - -

42 Odai Varigal - -

43 Vanduvancheri Alam - -

45 Vadi Voikal - -

46 Thanoikkal 14,158,000 15,722,575 13,521,414 16,871,355 - -16,871,355 14,509,366 - -14,509,366

47 Pitchankottagam Drain Infall & Bridge - -

48 Varnduvancheri PS intake channel - -

49 Thulasiappattinam Bridge - -

50 Valavanar Vadi Voikkal - -

51 Vellodai - -

52 Thondiyakkadu Vadigal - -

53 Valavanar PS intake channel - -

54 Karpaganathar-Killam Road Bridge/TER - -

55 Manavari Vadigal - -

56 Local Drain - -

57 Existing TER - -

58 Voimedu Vadigal Bed Dam - -

59 Valavanar Straight Cut 65,649,689 72,904,517 62,697,885 78,231,334 70,606,013 0.27 - -186,958,843 67,278,947 82,100,015 0.37 -1% -

139,405,761

Earth Works

Earth work for Standardization 150,492,000 167,122,598 143,725,434 179,333,522 22,225,240

0.08

-

-251,363,492

154,226,829 25,843,303

0.11

-

-209,443,007

Formation of Road & Culvert 8,510,000 10,041,800 8,635,948 10,775,511

Additional costs




83

Serial



Investment Economic

NPV Costs @12%


B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


Cost increase after October 2014 118,248,714 164,910,311 183,134,250 157,495,455 190,186,764 - -190,186,764 163,560,617 -

Totals 416,396,410 463,002,996 398,182,577 488,799,977 70,606,013 0.14 - -407,418,454 411,101,041 82,100,015 0.20 -

-329,001,026

84

Appendix H. Feasibility of Vedharanyam Canal Structures and Re-Sectioning

H.1 Structure/work, ayacut, proposed work, groundwater availability and tail-end-location

Serial No.

PWD chainage Location Name/Description

Drainage Sluice

Drainage Siphon

Agreed Works


Base cost

(km)

Catchment (ha)

Catchment Area (ha)


INR

A/C Junction Kaduvayar River N Y

1 0.550 R Drainage Sluice no data No work N Y

2 0.780 R Drainage Sluice no data No work N Y

3 1.225 A/C Irrigation Siphon no data No work N Y

4 1.600 L Drainage Infall no data No work N Y

5 3.100 A/C Paravai Road Bridge No work N Y

6 3.270 R Kurichi Drainage no data No work N Y

7 3.850 R Vanipalasai Drainage no data No work N Y

8 8.000 R Vellaiyar Old Course Straight Cut No work N Y

9 8.000 L Vellaiyar Old Course No work N Y

10 Start-North (Velankannai) No work N Y

11 A/C Velankannai Road Bridge (ECR)-on Old Vellaiyar Course

No work N Y

12 8.550 L Vallaiyar Straight cut Vallaiyar N Y

13 8.650 R Vallaiyar Main Channel No work N Y

14 9.890 R Periyathumbur Drainage no data No work N Y

15 9.950 R Thalaiyamalai Drainage no data No work N Y

16 11.350 R Choshavithapuram Drainage no data No work N Y

17 11.980 A/C Foot bridge No work N Y

18 A/C Karukannai Road Bridge No work N Y

19 A/C Karukannai Regulator No work N Y

20 A/C Karukannai Old Road Bridge No work N Y

21 14.710 A/C Karukannai New Road Bridge (ECR) No work N Y

85

Serial No.


Drainage Sluice

Drainage Siphon

Agreed Works


Base cost

(km)

Catchment (ha)

Catchment Area (ha)


INR

22 15.400 R Kuppaiyan Drainage Sluice 150 150 Reconstruction N Y 11,000,000

23 16.100 L Moongiladi Drainage Sluice no data No work N Y

24 16.750 R Thapalkaran Drainage Sluice 150 150 Reconstruction N Y 3,500,000

25 17.650 R Keelaiyur Drainage Sluice 150 150 Reconstruction N Y 4,500,000

26 18.740 R Pappanar Open Infall no data No work N Y

27 19.100 L Thombaiyan Drainage Sluice 150 150 Reconstruction N Y 3,500,000

28 19.206 A/C Sadayankottagam Road Bridge No work N Y

29 20.256 R Sadayankottagam Drainage Sluice no data No work N Y

30 20.456 R Chakkiliyana Voikal infall no data No work N Y

31 A/C Tharkalnyiru Road Bridge No work N Y

32 L Chakkiliyana Straight Cut No work N Y

33 23.056 R Mudaliyappankandi Drainage Sluice 150 150 Reconstruction N Y 3,500,000

34 24.116 R Old Chakkiliyan Voikkal Drainage Sluice 300 300 Reconstruction N Y 4,500,000

35 24.216 R Harichandra Infall No structure N Y

36 L Lawford Straight Cut Harichandra N Y

37 24.300 A/C Kodisuthi Road Bridge (Thalaignayar ROB) No work N Y

38 24.320 A/C Rajan Voikkal Siphon 500 500 Reconstruction N Y 8,000,000

39 25.910 L Kovilpathu Drainage Sluice no data No work N Y

40 27.300 R Adavalanjan Drainage Sluice 150 150 Reconstruction N Y 4,500,000

41 28.650 A/C Nallar Straight Cut No work N Y

42 30.320 A/C Sembodi Road Bridge( Vedharanyam-Nagapattinam)

No work N Y

43 31.200 R Adappar Infall No work N Y

44 31.200 L Adappar Straight Cut Adappar N Y

45 32.150 A/C Footbridge No work N Y

46 34.410 R Era Voikal drainage infall 1,683 1,683 New N Y 11,000,000

47 36.125 A/C Periyakuthuri Road Bridge (Sembodia-Pushpavanam)

No work N Y

48 37.085 A/C Footbridge No work N Y

86

Serial No.


Drainage Sluice

Drainage Siphon

Agreed Works


Base cost

(km)

Catchment (ha)

Catchment Area (ha)


INR

49 39.085 R Mavadi Voikkal no data No work N Y

50 40.485 R Thethagudi Village Vadigal no data No work N Y

51 44.335 A/C Thopputhuri Road Bridge (Vedharanayam-Periyakuthagai)

No work N Y

52 46.100 A/C Uppanar Drain (to sea) No work N Y

53 46.600 A/C Vedharanyam-Aarukattuthuri New Bridge No work N Y

54 A/C AarukattuthuriOld Bridge No work N Y

55 49.185 A/C Nangukal Mandabam Old Bridge No work N Y

56 A/C Nangukal Mandabam New Bridge No work N Y

57 50.685 A/C Maniyan Road Bridge No work N Y

58 A/C Maniyan Road Bridge No work N Y

59 A/C Vedarayam Railway Bridge No work N Y

60 52.185 A/C Vedharanyam-Sathyagraha Memorial place No work N Y

61 53.255 A/C Kodiyakarai Road Bridge No work N Y

62 55.700 A/C To Salt Swamp (Agasthiyampalli) No structure N Y

63 A/C End No structure N Y

Earth Works Strengthening West Bank of Vedaraniyam Canal from LS 18.500 to 31.200 km

New 82,464,691

Dredging the Bed of V. Canal from LS 44.000 km to 46.100 km and Uppanar Drain from LS 0.000 to 1.500km

New

24,299,935




Totals 3,383 2,883 500

87

H.2 Financial and Economic analysis per irrigation/drainage component or flood protection work and for the entire

canal


Serial No. Name/Description Base cost


Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


Junction Kaduvayar River - -

1 Drainage Sluice - -

2 Drainage Sluice - -

3 Irrigation Siphon - -

4 Drainage Infall - -

5 Paravai Road Bridge - -

6 Kurichi Drainage - -

7 Vanipalasai Drainage - -

8 Vellaiyar Old Course Straight Cut - -

9 Vellaiyar Old Course - -

10 Start-North (Velankannai) - -

11 Velankannai Road Bridge (ECR)-on Old Vellaiyar Course - -

12 Vallaiyar Straight cut - -

13 Vallaiyar Main Channel - -

14 Periyathumbur Drainage - -

15 Thalaiyamalai Drainage - -

16 Choshavithapuram Drainage - -

17 Foot bridge - -

18 Karukannai Road Bridge - -

19 Karukannai Regulator - -

20 Karukannai Old Road Bridge - -

21 Karukannai New Road Bridge (ECR) - -

22 Kuppaiyan Drainage Sluice 11,000,000 12,215,590 10,505,407 13,108,130 2,583,642 0.20 - -10,524,488 11,272,992 2,402,796 0.21 - -8,870,196

23 Moongiladi Drainage Sluice - -

24 Thapalkaran Drainage Sluice 3,500,000 3,886,779 3,342,630 4,170,769 2,583,642 0.62 8% -1,587,127 3,586,861 2,402,796 0.67 8% -1,184,065

88




Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


25 Keelaiyur Drainage Sluice 4,500,000 4,997,287 4,297,667 5,362,417 2,583,642 0.48 6% -2,778,775 4,611,679 2,402,796 0.52 6% -2,208,883

26 Pappanar Open Infall - -

27 Thombaiyan Drainage Sluice 3,500,000 3,886,779 3,342,630 4,170,769 2,583,642 0.62 8% -1,587,127 3,586,861 2,402,796 0.67 8% -1,184,065

28 Sadayankottagam Road Bridge - -

29 Sadayankottagam Drainage Sluice - -

30 Chakkiliyana Voikal infall - -

31 Tharkalnyiru Road Bridge - -

32 Chakkiliyana Straight Cut - -

33 Mudaliyappankandi Drainage Sluice 3,500,000 3,886,779 3,342,630 4,170,769 2,583,642 0.62 8% -1,587,127 3,586,861 2,402,796 0.67 8% -1,184,065

34 Old Chakkiliyan Voikkal Drainage Sluice 4,500,000 4,997,287 4,297,667 5,362,417 5,167,284 0.96 12% -195,133 4,611,679 4,805,592 1.04 12% 193,913

35 Harichandra Infall - -

36 Lawford Straight Cut - -

37 Kodisuthi Road Bridge (Thalaignayar ROB) - -

38 Rajan Voikkal Siphon 8,000,000 8,884,065 7,640,296 9,533,186 8,612,139 0.90 11% -921,046 8,198,540 8,009,319 0.98 12% -189,220

39 Kovilpathu Drainage Sluice - -

40 Adavalanjan Drainage Sluice 4,500,000 4,997,287 4,297,667 5,362,417 2,583,642 0.48 6% -2,778,775 4,611,679 2,402,796 0.52 6% -2,208,883

41 Nallar Straight Cut - -

42 Sembodi Road Bridge( Vedharanyan-Nagapattinam) - -

43 Adappar Infall - -

44 Adappar Straight Cut - -

45 Footbridge - -

46 Era Voikal drainage infall 11,000,000 12,215,590 10,505,407 13,108,130 28,988,461 2.21 20% 15,880,331 11,272,992 26,959,368 2.39 21% 15,686,376

47 Periyakuthuri Road Bridge (Sembodia-Pushpavanam) - -

48 Footbridge - -

49 Mavadi Voikkal - -

50 Thethagudi Village Vadigal - -

89




Investment Economic

NPV Costs @12%

NPV Net Benefits

@12%

B/C @12%


@12%

NPV Net Benefits

@12%

B/C @12%

EIRR NPV @12%


51 Thopputhuri Road Bridge (Vedharanayam-Periyakuthagai) - -

52 Uppanar Drain (to sea) - -

53 Vedharanyam-Aarukattuthuri New Bridge - -

54 AarukattuthuriOld Bridge - -

55 Nangukal Mandabam Old Bridge - -

56 Nangukal Mandabam New Bridge - -

57 Maniyan Road Bridge - -

58 Maniyan Road Bridge - -

59 Vedarayam Railway Bridge - -

60 Vedharanyam-Sathyagraha Memorial place - -

61 Kodiyakarai Road Bridge - -

62 To Salt Swamp (Agasthiyampalli) - -

63 End - -

Earth Works

Strengthening West Bank of Vedaraniyam Canal from LS 18.500 to 31.200 km 82,464,691 91,577,715 78,756,834 98,268,901

42,661,651 0.34 - -84,564,224

84,511,255

55,688,369 0.51 2% -53,725,884

Dredging the Bed of V. Canal from LS 44.000 km to 46.100 km and Uppanar Drain from LS 0.000 to 1.500km 24,299,935 26,985,277 23,207,338 28,956,974 24,902,998

Additional costs




Cost increase after October 2014 81,071,621 114,585,383 127,248,005 109,433,284 132,148,336 - -132,148,336 113,647,569 -

Totals

311,763,940 346,216,406 297,746,110 363,520,813 100,931,387 0.28 3.9% -262,589,426 312,627,899 109,879,422 0.35 5.6% -202,748,477

90

Appendix I. Flood Damage I.1 Flood damage data Thiruvarur & Nagapattinam districts 2004-2015 (INR, 2015 price level)

Loss of life Damaged houses Crop damage

Drowned animals Roads & Bridges

Water supply

Irrigation infrastructure

Total direct damages

Incl. indirect damages

Deflator 2014=1

Year Male

Female

Children Total/1 Value Fully Partly Value /2 Value /3 Cow Bulloc

k Buffal

o Calf Goat Sheep Value /4 Value Value Value Value Value Factor

/5

Unit value 274,57

5 12,679 6,340 35,000 32,500 35,00

0 7,50

0 3,50

0 3,500 25%

2004 8 8 5 21 5,766,066 2,215 15,913 128,969,500 20 3 3 9 29 10 1,106,500 135,842,066 169,802,582 2.0207

2005 32 2 1 35 9,610,109 2,414 7,449 77,833,090 48 6 7 6 44 2,319,000 89,762,199 112,202,749 1.9385

2006 5 1 4 10 2,745,745 16 262 1,863,886 18 1 5 21 773,500 4,362,798 907,170 10,653,100 13,316,375 1.8216

2007 6 4 2 12 3,294,895 631 2,980 26,893,212 153 13 13 47 77 6 6,875,500 2,540,555 20,308,936 59,913,098 74,891,372 1.7224

2008 33 24 4 61 16,749,047

198,959

121,900

3,295,515,300 17,018,020 170 9 17 83 486 9,161,000 14,900,278 69,741,229 3,423,084,875 4,278,856,094 1.5851

2009 3 1 1 5 1,372,873 41 359 2,795,829 104 5 6 56 143 4,933,000 47,177,300 56,279,002 70,348,752 1.4945

2010 20 12 2 34 9,335,535 32 419 3,062,098 1,172,090,101 161 5 4 105 356 222 8,748,000 43,931,928 81,802,622 1,318,970,284 1,648,712,854 1.3729

2011 3 3 2 8 2,196,596 14 101 817,828 1,417,932,897 46 2 3 18 50 2,090,000 437,442,635 30,652,68

3 40,789,941 1,931,922,580 2,414,903,225 1.2679

2012 7 3 10 2,745,745 24 257 1,933,623 47,262,430 104 9 4 74 182 5,264,500 470,052 57,676,351 72,095,438 1.1693

2013 2 2 1 5 1,372,873 63,444 14 1 17 34 771,500 8,602,637 10,810,454 13,513,067 1.0753

2014 1.0300

2015/6

4 1 9 2,545,306

950,096,844 268 356 2,270

20,594,850

8,531,803,800

9,505,040,800 9,505,040,800 1.0000

Total 123 60 23 210 59,390,47

5 204,34

6 149,64

0 3,645,874,89

8 3,684,094,74

3 1,106 53 58 776 3,69

2 238 63,898,62

5 9,058,938,05

5 31,572,26

4 269,033,168 16,812,802,22

8 16,812,802,22

8

Sources: District Collectors Thiruvarur & Nagapattinam

/1: 2 lakh per victim, Times of India 8-12-10

/2: http://hindu.com/thehindu/thscrip/print.pl?file=2011010455590300.htm&date=2011/01/04/&prd=th&

/3: http://hindu.com/thehindu/thscrip/print.pl?file=2010120655110400.htm&date=2010/12/06/&prd=th&

/4: Department of Animal Husbandry, Thanjavur 2014

/5: Based on www.tradingeconomics.com/india/gdp-deflator and www.indexmundi.com/facts/india/gdp-deflator

91

Appendix J. Border prices of main traded inputs and outputs

Rice Thailand 5% broken, FOB Bangkok per Export/Import substitute EXPORT

Product location Thailand Quality of product (broken) 5%

Avg 2011-15

US$/t (Current) 485 Quality differential 0.9 Equivalent value of Indian product 436 Less: Freight and insurance cost to local Asian port -35 Value at Indian port 471 Conversion to Indian Rupees (Rs)

Exchange rate 65 Value at Indian port (Rs/t) 30,646 Less: Port handling charges, storage, and losses -1,138 Less: Local transport dealer & processing costs -1,400 Value at local market/processor/mill 28,108 Less: Milling cost -310 Equivalent price of paddy at mill @ 65% recovery 18,068 Less: Transport cost - farmgate to local market/mill -120 Economic paddy price at farmgate, export parity (Rs/ton) 17,948 Financial paddy price used in analysis 14,600 Standard conversion factor 1.2

Urea bulk FOB Black Sea per ton Export/Import substitute IMPORT

Product location E. Europe Quality of product (N) 46%

Avg 2011-15

US$/t (Current) 352 Quality differential 1 Equivalent value of Indian product 352 Plus: Freight and insurance cost from Europe 35 Value ex-Indian port 387 Conversion to Indian Rupees (Rs)

Exchange rate 65 Value at Indian port (Rs/ton) 25,165 Plus: Port charges 1,078 Plus: Internal handling and transport 220 Plus: Bagging 650 Value ex factory 27,113 Plus: Transport to farmgate 420 Economic price at farmgate 27,533 Financial price at farmgate 5,942 Standard conversion factor 4.6

92

Triple Superphosphate (TSP) bulk granular FOB Tunisia per ton Export/Import substitute IMPORT

Product location Mediterranean Quality of product (P) 46%

TSP bulk granular FOB Tunisia Avg 2011-15

US$/t (Current) 432 Quality differential 1 Equivalent value of Indian product 432 Plus: Freight and insurance cost from Mediterranean 35 Value ex-Indian port 467 Conversion to Indian Rupees (Rs)

Exchange rate 65 Value at Indian port (Rs/t) 30,343 Plus: Port charges 1,251 Plus: Internal handling and transport 220 Plus: Bagging 650 Value ex factory 32,464 Plus: Transport to farmgate 420 Economic price at farmgate 32,884 Financial price at farmgate 16,470 Standard conversion factor 2.0

DAP FOB Vancouver per ton Export/Import substitute IMPORT

Product location Vancouver Quality of product (K) 60%

Avg 2011-15

US$/t (Current) 509 Quality differential 1 Equivalent value of Indian product 509 Plus: Freight and insurance cost from Vancouver 45 Value ex-Indian port 554 Conversion to Indian Rupees (Rs)

Exchange rate 65 Value at Indian port (Rs/ton) 35,989 Plus: Port charges 1,264 Plus: Internal handling and transport 220 Less: Bagging 650 Value ex importer 38,123 Plus: Transport to farmgate 420 Economic price at farmgate 38,543 Financial price at farmgate 23,148 Standard conversion factor 1.7