AQUIFER MAPPING - Central Ground Water Boardcgwb.gov.in/AQM/NAQUIM_REPORT/Assam/Goalpara,Kamrup,Bapeta.pdf · AQUIFER MAPPING REPORT- 2012-14 4 | P a g e because area has large reservoir

क� द्र�य भू�म �ल बो

जल संसाधन, नद� �वकास और गंगा सरं�ण मतंाला

भारत सरकार Central Ground Water Board

Ministry of Water Resources, River Development and Ganga Rejuvenation

Government of India

Report on

AQUIFER MAPPING In Parts of Golapara, Kamrup and Bapeta

Districts,Assam

उ�र� पूव� �ेत, गवुाहाट�

North Eastern Region, Guwahati

Draft Report

AQUIFER MAPPING REPORT- 2012-14 1 | P a g e

Govt. of India Central Ground Water Board

Ministry of Water Resources, River Development & Ganga Rejuvenation

FLOOD PLAIN AQUIFER MAPPING IN

PARTS OF GOALPARA, KAMRUP AND BAPETA DISTRICTS, ASSAM

(AAP 2012-13 & 2013-14)

North Eastern Region Guwahati

March- 2016

For Official Use Only


AQUIFER MAPPING IN PARTS OF GOALPARA, KAMRUP AND BARPETA DISTRICTS, ASSAM

CONTENTS

Chapter - Page No.

1. Introduction 1-2

2. Data collections and generation 3-7

3. Data interpretation, integrations and aquifer mapping 8-14

4. Ground Water Resources 15-16

5. Ground Water related issues 17

6. Management Strategies 18-19

Maps -

Map 1 Study area 20

Map 2 Base map with Key wells 21

Map 3 Drainage map 22

Map 4 Data generation maps with VES 23

Map 5 Pre-monsoon water level counter 24

Map 6 Post-monsoon water level counter 25

Map 7-8 Panel diagram showing disposition of aquifer 26-27

Map 9 Iron Map 28

Map 10 Geological map 29

Map 11 Hydrogeological map

30


1. INTRODUCTION

An area of 1450 sq km falling in parts of Goalpara (250 sq. km), Kamrup (1030 sq

km) and Barpeta (170 sq km) districts of Assam was covered as per the Annual Action Plan

2012-13 and 2013-14 of Central Ground Water Board, North Eastern Region, Guwahati.

The study area spread over 1450 sq.km falling under Survey of India toposheets no.

78 J/16, 78 N/4, 8 and 12 lies between North latitudes 26º00/00// & 26º15/00// and East

longitudes 90º45/00// & 91º45/00//. The study area lies mostly in the southern part of the

Brahmaputra River.

The total population of the Kamrup district is as per 2011 Census is 12, 60,419, with

6, 55,630 Male and 6, 04,789 female. The total population of the Goalpara district as per

2011 census is 10, 08959, with 514,162 male and 49, 4797 female. The total population of

the Barpeta district as per 2011 Census is 16, 93,190 with male 8, 67,891 and female 8,

25,299. The population density as per 2011 Census is 553.

The approach to be followed to identify and delineate the horizontal and vertical

disposition of aquifer as well as to study the aquifer character, essentially consist of

hydrogeological data, geological of area and ground water exploration or exploratory drilling

operation and drilling to be carried out rotary method in view of unconsolidated or soft rock

area (valley filled area) and collected the exiting data of the study area like Ground water

exploration, Monitoring stations, Vertical electrical sounding(V.E.S) and prepared the data

gap map than planned the data generation maps in this connection seven exploratory well

constructed, 69 key wells including existing CGWB monitoring stations (Dug well) were

monitored in different season and there is no major water conversation and recharge

structure.

The mightily Brahmaputra flows from East to West in the study area and the main

tributaries of the Brahmaputra are Kulsi ,Krishnai, and Hajo satu nadi. Dudhnai and Krishnai

River originate from hills of Meghalaya then join each other on the western part of study area

and flow as river of Mornoi up to its confluence with the Brahmputra and ultimately join near

south Salmara of Dhubri District. All the rivers are perennial in nature. The common drainage

patterns are sub-parallel to parallel and dendritic. Apart from the Brahmaputra River, up to

third order streams are found in the study area.as far as concern hydrology in the area ,it is

very potential for construction shallow tube wells for irrigation with 8-14 lps discharge,


because area has large reservoir of water resources with the River Brahmaputra and its

tributaries.

There are six agro-climatic zones in the state – 1.North Bank plain zone 2. Upper

Brahmaputra valley, 3. Central Brahmaputra valley, 4.Lower Brahmaputra valley, 5. Barak

Valley, 6. Hill zone and study area fall in Lower Brahmaputra valley area, which is potential

for agriculture and irrigation. The climate in the study area is moderate during the winter and

it is hot during summer. Rain makes first appearance in the month of April. Monsoon rain

normally started from the Month of June and heavy rain occurs during September. The

average annual rainfall in the area varies from 1500 to 1800 mm. The average relative

humidity in a year is 78.7 per cent.

The study area is characterized by an almost flat plain except for few low hills that

break the monotony of the terrain. The Study area represents association of variety

geological formations ranging in age from Archaean to Recent. The assemblages of different

formations play important role in controlling occurrence, distribution and movement of

ground water and area is underlain by the Archaean Gneissic complex (inselbergs) and

Quaternary Alluvial formations. The Archaean gneissic complex includes of metamorphic

complex of gneiss, schist, phyllite intruded by acid/basic intrusive. The study area is

characterized by an almost flat plain except for few low hills that break the monotony of the

terrain. The northern most part of toposheet No.78J/16 which falls mostly in Barpeta district

is flood prone area. A significance of SE part of the study area is the large number of sandy

river islands in the Brahmaputra river. The alluvial land is flat with gentle slope of less than

1m/ km towards Brahmaputra River. The hills mostly are isolated inselbergs with heights

ranging between 60 m to 269 m above msl.


Data Collection and Generation 2.1 Depth to Water Level

Sixty-nine key observation wells, comprising Dug wells were established in the study

area to study the water level fluctuation and its behavior in the study area. These key

observation wells were monitored periodically (Pre-monsoon and Post-monsoon) during the

course of study detail of monitoring stations given table No- 01

Table 1: Water level monitoring stations locations

Unique ID Location Lat Long Est

Year RL Total Depth

Type of

Well

Aquifer Group MP(m) Source

/Agency

1 Krishnai Village

26.71 90.75 2012 40 5.68 DW Phreatic 0.85 Private 2 Matia 26.06 90.78 2012 40 4.56 DW Phreatic 0.56 Private 3 Kadurtala 26.10 90.78 2012 41 6.36 DW Phreatic 0.58 Private 4 Baikaiteri

village 26.06 90.83 2012 40 6.58 DW Phreatic 0.78 Private

5 Nandeshwar 26.04 90.78 2012 40 7.87 DW Phreatic 1.02 Private 6 Sarapara 26.02 90.81 2012 40 8.56 DW Phreatic 0.66 Private 7 Sidhibari 26.07 90.82 2012 40 15.25 DW Phreatic 0.58 Private 8 Kahibari 26.02 90.93 2012 40 12.25 DW Phreatic 0.78 Private 9 Bhalukjulia 26.01 90.92 2012 58 10.36 DW Phreatic 0.99 Private

10 Simlitola. 26.07 90.92 2012 40 11.58 DW Phreatic 0.54 Private 11 Silmari 26.26 90.79 2012 41 9.5 DW Phreatic 0.44 Private 12 Karipara 26.03 90.83 2012 40 12.25 DW Phreatic 0.58 Private 13 Bahati 26.09 90.83 2012 40 6.36 DW Phreatic 0.58 Private 14 Dolepara 26.03 90.76 2012 55 8.89 DW Phreatic 0.69 Private 15 Simlitola II 26.00 90.97 2012 40 10.23 DW Phreatic 0.69 Private 16 chackla 26.24 90.99 2012 40 11.25 DW Phreatic 0.89 Private 17 Damnapara 26.06 90.88 2012 41 9.68 DW Phreatic 0.99 Private 18 Kadamtala 26.09 90.78 2012 40 6.59 DW Phreatic 1.05 Private 19 Deochar-I 91.24 26.09 2013 44 5.65 DW Phreatic 0.89 Private 20 Lampara FG 91.28 26.02 2013 56 8.69 DW Phreatic 0.56 Private 21 Panchmtola 91.40 26.03 2013 38 15.2 STW Phreatic Private 22 Panchmtola -

FG 91.40 26.03 2013 39 5.65 DW Phreatic 0.7 Private

23 Sapotari 91.38 26.09 2013 41 9.89 STW Phreatic Private 24 Gumi 91.34 26.08 2013 45 5.6 DW Phreatic 0.7 Private 25 Deochar-II 91.25 26.00 2013 41 7.56 DW Phreatic 0.5 Private 26 Diliapara 91.24 26.04 2013 42 8.65 DW Phreatic 0.6 Private 27 Allagjiari 91.19 26.03 2013 44 5.36 DW Phreatic 0.5 Private 28 Bitamari 91.10 26.08 2013 45 8.85 STW Phreatic Private 29 Michilamara 91.08 26.04 2013 41 4.65 DW Phreatic 0.8 Private 30 Milanpara 91.29 26.01 2013 51 6.36 DW Phreatic 0.5 Private 31 Khorkhari 91.3 26.03 2013 56 4.65 DW Phreatic 0.6 Private 32 Kutari 91.44 26.11 2013 39 6.56 DW Phreatic 0.9 Private 33 Simena 91.45 26.11 2013 40 5.69 DW Phreatic 0.7 Private


34 Kachumara 91.05 26.14 2013 45 8.69 DW Phreatic 0.7 Private 35 Samtoli 91.10 26.14 2013 46 7.68 STW Phreatic 0.5 Private 36 Purangaaon 91.14 26.12 2013 40 8.8 DW Phreatic 0.6 Private 37 Manjuri 91.21 26.09 2013 42 4.65 DW Phreatic 0.6 Private 38 Madhupur 91.18 26.09 2013 46 6.65 STW Phreatic 0.9 Private 39 Duramari 91.09 26.09 2013 41 5.69 DW Phreatic 0.7 Private 40 Rangeshwari 91.02 26.11 2013 43 7.98 DW Phreatic 0.8 Private 41 Paharpur 91.01 26.24 2013 39 14.25 STW Phreatic Private 42 harapara 91.48 26.04 2013 45 4.65 DW Phreatic 0.6 Private 43 Gharmara 91.43 26.01 2013 57 12.32 STW Phreatic Private 44 Ranpur 91.48 26.07 2013 46 6.65 DW Phreatic 0.9 Private 45 Patgaon 91.5 26.02 2013 45 6.69 DW Phreatic 1 Private 41 Paharpur 91.01 26.24 2013 39 14.25 STW Phreatic Private 42 harapara 91.48 26.04 2013 45 4.65 DW Phreatic 0.6 Private 43 Gharmara 91.43 26.01 2013 57 12.32 STW Phreatic Private 44 Ranpur 91.48 26.07 2013 46 6.65 DW Phreatic 0.9 Private 45 Patgaon 91.5 26.02 2013 45 6.69 DW Phreatic 1 Private 46 Dekapara 91.29 26.10 2013 42 5.69 DW Phreatic 0.5 Private 47 Vishwakama

Temple 91.71 26.16 2013 55 9.98 DW Phreatic 0.7 Private

48 Patgaon 91.60 26.09 2013 43 5.69 DW Phreatic 0.5 Private 49 Bhellaguri 91.70 26.21 2013 43 7.65 DW Phreatic 0.9 Private 50 Lachitpur 91.64 26.18 2013 45 4.65 DW Phreatic 1 Private 51 Mairapatti 91.69 26.18 2013 41 5.65 DW Phreatic 0.9 Private 52 Ashwaklanta

Temple 91.74 26.21 2013 38 7.58 DW Phreatic 0.9 Private

53 Avayapui 91.70 26.21 2013 41 4.65 DW Phreatic 1 Private 54 Survey

Odalbakra 91.74 26.12 2013 44 5.69 DW Phreatic 0.9 Private

55 Dirgheswari 91.74 26.23 2013 47 5.69 DW Phreatic 0.7 Private 56 Azara Phc 91.50 26.11 2013 43 4.65 DW Phreatic 0.8 Private 57 Maligaon 91.62 26.12 2013 42 5.65 DW Phreatic 1 Private 58 Boragaon 91.61 26.08 2013 41 4.56 DW Phreatic 0.6 Private 59 Lalganesh

Chariali 91.74 26.1 2013 39 6.65 DW Phreatic 0.7 Private

60 Fatasil Ambari

91.72 26.00 2013 40 6.59 DW Phreatic 0.7 Private 61 Mmc Hospital

Panbazar 91.74 26.18 2013 38 111.3 DTW Phreatic 1.3 Govt

62 Odalbakra 91.74 26.14 2013 42 89.65 DTW Phreatic 1.2 Private 63 Adagudam 91.74 26.13 2013 41 125.3 DTW Phreatic 1 Private 64 Betkuchi 91.72 26.11 2013 54 123.3 DTW Phreatic 1.3 Private 65 Iit, North

Guwahati 91.69 26.18 2013 46 98.65 DTW Phreatic 1.2 Govt

66 Garigaon 91.64 26.15 2013 47 88.58 DTW Phreatic 1.3 Private 67 Panbazar

Circuit House 91.68 26.19 2013 43 5.65 DW Phreatic 0.7 Private

68 Auu,kahikuchi 91.60 26.10 2013 44 6.56 DW Phreatic 0.9 Private


2.2 Ground Water Exploration:-

During the aquifer mapping Central Ground water Board (C.G.W.B) has been drilled

7 exploratory well in area, for finding vertical and horizontal delineation of aquifer system

and their hydrogeological properties. Table No.2: Detail of Exploratory wells drilled under Aquifer Mapping

SI No

Location Depth ( m)

Dia in

Inch

Toposheet No

Lat Long Type of Well

1 Dalgoma 103.3 6” 78J/16 90.8 26.0833 EW+OW 2 Sidhabari 107.6 8” 78J/16 90.8256 26.0711 EW+OW 3 Simlitola 136.1 8” 78J/16 90.9239 26.0703 EW 4 Digheli 183 8” 78J/16 91.0167 26 EW+OW 5 Deochar 120.3 8” 78N/8 91.2461 26.0494 EW+OW 6 Agchia 194.45 8” 78N/12 91.5711 26.1295 EW+OW

7 Chamaria 200 8” 78N/4 91.1511 26.0511 EW+OW

2.3 Geophysical studies:- Vertical Electrical Sounding (V.E.S) were carried out to assess the feasibility of

construction of exploratory tube well at selected sites in the study area and to get information

on subsurface geology at particular places where gaps in data exists. Accordingly, the surface

geophysical studies were conducted during APP -2012-13 and 2013-14. Details of V.E.S.

given table No-03

Table No.03: Location of V.E.S SI. No

District Location/ Village

Depth (m)

Hard rock/ Soft

Rock

Conducted during

AAP-2012-14

Long Lat Remarks

1 Kamrup 2 no. Jaikur Village

62.00 Soft Rock 2013-14 91.4219 26.0986

Semiconsolidted and consolidated rock encountred after 187 m acccording to Geophysical data

2 Kamrup Rani 70.00 Soft Rock 2013-14 91.6317 26.0564 3 Kamrup 1no. Jaikur

village 120.0 Soft Rock 2013-14

91.4167 26.0833 4 Kamrup Gumi I 38.00 Soft Rock 2013-14 91.0950 26.0950 5 Kamrup Bholagaon 63.00 Soft Rock 2013-14 91.5083 26.0189 6 Kamrup Badekuchi 161.0 Soft Rock 2013-14 91.3794 26.0244 7 Kamrup Hathigarh 114.0 Soft Rock 2013-14 91.3753 26.9867 8 Kamrup 1 no. Balasidhi

village 67.00 Soft Rock 2013-14 91.3981 26.0358

9 Kamrup Simina 44.00 Soft Rock 2013-14 91.2361 26.0356 10 Kamrup Chamaria 92.00 Soft Rock 2013-14 91.1689 26.0533 11 Kamrup Hafshapara 34.00 Soft Rock 2013-14 91.1264 26.1350 12 Kamrup 1 no. Rangapani 67.00 Soft Rock 2013-14 91.0792 26.1261


13 Kamrup Rajapukhari 49.00 Soft Rock 2013-14 91.0633 26.1147 14 Kamrup Chapathuri 63.00 Soft Rock 2013-14 91.4525 26.1214 15 Kamrup Rampur 96.00 Soft Rock 2013-14 91.4706 26.0914 16 Kamrup Mirza city 225.0 Soft Rock 2013-14 91.5381 26.1083 17 Kamrup Palasbari 57.00 Soft Rock 2013-14 91.5408 26.1242 18 Kamrup Lakhadubi 65.00 Soft Rock 2013-14 91.3100 26.0292 19 Kamrup Hatipara 57.00 Soft Rock 2013-14 91.2744 26.0864 20 Kamrup Gumi II 16.50 Soft Rock 2013-14 91.3417 26.0942 21 Kamrup Tarabari 85.00 Soft Rock 2013-14 91.1378 26.0153 22 Kamrup Jugipara 76.00 Soft Rock 2013-14 91.0822 26.0422 23 Kamrup Chaplai 38.00 Soft Rock 2013-14 91.0500 26.0203 24 Kamrup Azara 150 Soft Rock 2013-14 91.6208 26.1097 25 Kamrup Mirza 86.70 Soft Rock 2013-14 91.5667 26.0833 26 Kamrup Pubmajir Gaon 24.65 Soft Rock 2013-14 91.5847 26.1250 27 Kamrup Palli 50.85 Soft Rock 2013-14 91.5628 26.1153 28 Kamrup Andherjuli 31.96 Soft Rock 2013-14 91.6008 26.0456 29 Kamrup Gotanagar 161.1 Soft Rock 2013-14 91.6767 26.1439 30 Kamrup Singijani 61.7 soft rock 2012-13 90.9142 26.0358 31 Goalpara Dulehaparyanpu

ra 19 soft rock 2012-13 90.7606 26.0317

32 Goalpara Dalgoma 87 soft rock 2012-13 90.7875 26.1011 33 Goalpara Sidhabari 187 soft rock 2012-13 90.8322 26.0750 34 Goalpara Simlitola 108 soft rock 2012-13 90.9164 26.0631 35 Goalpara Digheli 272 soft rock 2012-13 91.0531 25.9836 36 Goalpara Uparthala 32 soft rock 2012-13 90.7889 26.0350 37 Goalpara Sonapur 38 soft rock 2012-13 90.7025 26.0358 38 Goalpara Domani 28 soft rock 2012-13 90.7603 26.0769 39 Goalpara Matia 89 soft rock 2012-13 90.7836 26.0414 40 Goalpara Bakrapara 59 soft rock 2012-13 90.9356 26.0239 41 Goalpara Kalubari 82 soft rock 2012-13 90.9822 26.1042 42 Goalpara Rabhapara 132 soft rock 2012-13 90.9283 25.9703 43 Goalpara Darrang giri 110 soft rock 2012-13 90.7242 25.9711

2.4 Ground water quality:- To know the water quality of the study area, water sampling done from both shallow

and deeper aquifers. Ground water quality both in shallow and deeper zones are discussed

below. Water samples collected from the key wells that are established during NAQUIM

2012-13 and 2013-14 for finding the chemical quality in the study area, 46 water samples

collected from the dug wells and 10 water samples collected from the tube wells and

analyzed for the different chemical constituents at the Regional chemical laboratory of

CGWB, NER Guwahati and result are as given in table No-02


2.5 Pumping test – During the aquifer mapping 2012-14, eight pumping test conducted for finding

Hydrogeological properties of the aquifer in study area .like transitivity, Storatitivity etc.

Table No.04: Basic Information of Exploratory wells Constructed under APP

Village Taluka/Block Dist. Toposheet No

Lat Long Type of Well

Dalgaoma Matia

Goa

lpar

a 78J/16 90.80 26.0833 EW+OW Sidhabari Matia 78J/16 90.8256 26.0711 EW+OW Simlitola Matia 78J/16 90.9239 26.0703 EW Digheli - 78J/16 91.0167 26.00 EW+OW Deochar Boko

Kam

rup 78N/8 91.2461 26.0494 EW+OW

Agchia Palasbari 78N/12 91.5711 26.1295 EW+OW Chamaria Boko 78N/4 91.1511 26.0511 EW+OW


3. Data Interpretation, Integration and Aquifer Mapping- 3.1 Depth to Water Level -

Sixty-nine key wells have been monitored during the aquifer mapping and water level

(W.L.) ranges from 0.50 to 4.64 m bgl during post-monsoon and water level ranges from 1.00

to 7.85 m bgl during pre-monsoon. In major part of the study area, seasonal fluctuation varies

from 0.22 m at Maligaon to 4.12 m at Azara. Prepared the pre-monsoon and post-monsoon

contour map, most of the key wells W.L. data and water level contour maps are showing

water level varies between 2 to 5 m bgl in the study area except inselbergs area. The details

of key wells have given in table no 01.

3.2 Ground Water Exploration:-

It can be deciphered from the litholog of different exploratory wells drilled by

C.G.W.B. that EW show in regional scale mono aquifer system occur in the area. The aquifer

is comprised mainly of medium to coarse sand. This sandy aquifer is having gravel and clay

intercalations in places. In some places due to the presence of clay intercalations, 2 to 4

granular zones occur in the study area. Separations of two or more granular zones by clay

beds often misguide to classify the aquifers into a multiple aquifer system. However, these

clay beds are mostly in lensoid shape and they pinches out within a short distance. Thickness

of the saturated zone varies from 50 to 100 m within a depth range of 160m. The isopach map

of this aquifer shows that isopach value increases towards north of the study area i.e., towards

the Brahmaputra flood plain. Eight pumping has conducted during the aquifer mapping in

area, details of pumping test given below. The deep tube wells constructed by CGWB show

yield of 33 to 46 m3/hr for a drawdown of 2.46 to 7.46 m (maximum drawdown observed

near inselbergs). Details of aquifer parameter given table no 02.

3.3 Geophysical studies:-

Forty-three Vertical Electrical Sounding (V.E.S.) under surface geophysical studies

conducted during APP -2012-13 and 2013-14. By Mr. S.K Pali-Sc-C and Mr.P.P.Dookia

STA Geophysicist, According to the results of interpretation of V.E.S curves, correlation of

the data with hydrogeological details of exploratory boreholes and taking into account the

apparent resistivity following conclusions have been drawn in respects of parts of Kamrup

distt.:


1. The top soil with resistivity in the range of 100 and 270 Ohm with thickness within

10m comprises top soil with clays / hard clays etc.. 2. The underlying layers below the top soil in the depth below the top soil layer with

varying resistivity within 100 Ohm m in general is indicative of sandy formation

intercalated with clays / hard clays etc. Comparatively high resistivity above 100 Ohm

m is indicative of the hard clay/semi-consolidated or consolidated formation. 3. The inferences for bottom portion are drawn on the basis of interpreted results of

surface resistivity surveys, apparent resistivity pertaining to extreme portion of VES

curves and hydrogeological data.

The VES locations are shown in Map No-05.During the survey H, HK, HA type VES

curves were obtained. The inferences drawn on the basis of interpreted results could not be

obtained for deeper formation due to the limitations of unavailability of large and straight

stretch for current electrode separation. Interpreted results of VES and inferences with respect

to possible sub-surface geology.


3.4 Aquifer Geometry:-

The main objective of the study is to delineate the horizontal and vertical disposition

of aquifer as well as to study the aquifer character. In this connection 69 key wells including

existing CGWB monitoring stations (Dug well & Tube well) were monitored in different

season. Locations of the monitoring stations were shown in Map No-02 & 05. To know the

aquifer disposition in the study area, exploratory wells data, V.E.S. data available with

CGWB and some data of state departments, Govt. of Assam were utilized.

CGWB has drilled 16 EWs within a depth range of 94 to 220 m. A thin layer of

discontinuous clay beds occur at surface all over the alluvial deposit ranging in thickness

from 5 to 10 m. The tube wells drilled in alluvial deposits show alternate thick beds of sand,

gravel and thin beds of clay.

It can be deciphered from the lithologs of different exploratory wells drilled by

C.G.W.B. that EW show that in regional scale mono aquifer system occur in the area. The

aquifer is comprised mainly of medium to coarse sand. This sandy aquifer is having gravel

and clay intercalations in places to place. In some places due to the presence of clay

intercalations 2 to 4 granular zones occur in the study area. Separations of two or more

granular zones by clay beds often misguide to classify the aquifers into a multiple aquifer

system. However, these clay beds are mostly in lensoid shape and they pinches out within a

short distance. Thickness of the saturated zone varies from 50 to 100 m within a depth range

of 160m. The isopach map of this aquifer shows that isopach value increases towards north of

the study area i.e., towards the Brahmaputra flood plain. The deep tube wells constructed by

C.G.W.B. show yield of 33 to 46 m3/hr for a drawdown of 2.46 to 7.46 m (maximum

drawdown observed near inselbergs).

Table No. 05: Aquifer parameter in study area

Aquifer Depth of occurrence (m bgl)

Yield (m3/hr)

Sustainability(hr/day)

DD (m) T (m2/day) S

Mono aquifer

Up to 160 35-55 10-12 2-8 120-1540 4.2×10-6 to 1.24×10-3


3.5 Ground water quality:-

To know the water quality of the study area, water sampling done from both shallow

and deeper aquifers. Ground water quality of both shallow and deeper zones were discussed

below. 10 nos. of water samples from deep tube wells and 47 nos. of water samples from dug

wells were collected during the aquifer mapping or study for the chemical analysis. Water

samples collected during the study were analyzed for the different chemical constituents at

the Regional chemical laboratory of C.G.W.B. NER Guwahati and result are as given in table

No -02.

Table No.06: Sample wise chemical result

SI.No Location Name Long Lat pH EC µs/cm F Fe

1 Krishani 90.7570 26.7171 7.5 103.7 0.63 0.03 2 Matia 90.7864 26.0603 8.7 130.5 1.08 0.13 3 Kadutal 90.7864 26.1022 6.7 119.1 0.73 0.1


4 Kaduratal 90.8375 26.0603 8.8 260.6 1.45 0.02 5 Nanadeshwar 90.7894 26.0478 7.1 55.9 0.77 0.03 6 Sarapara 90.8166 26.0208 8.7 120.3 0.8 0.01 7 Sidhabari 90.8256 26.0711 8 133.1 1.28 1.44 8 Kahibari 90.9308 26.0299 8.6 107 1.22 0.02 9 Bhalukjulia 90.9400 26.0169 7.9 101.7 0.64 0.03

10 Simlitola 90.9239 26.0703 8.5 102.1 1.16 0.01 11 Karipara 90.8338 26.0308 7.7 92 0.86 0.02 12 Bahati 90.8375 26.0903 7.2 141.8 0.34 0.02 13 Dolepara Vill 90.7633 26.0322 7.5 59.2 0.72 0.05 14 Dalgoma 90.7858 26.1008 7.4 405 0.11 1.03 15 Kadamtala 90.7789 26.0981 6.6 68.2 0.12 0.17 16 Deochar-I 91.2489 26.0492 9 310 0.29 0.9

17 Panchmtola 91.4061 26.0631 8.6 127 1.01 0.6

18 Sapotari 91.3831 26.0919 8.9 266 1.32 2.25

19 Gumi 91.3492 26.0844 8.9 284 0.43 3.38

20 Deochar-II 91.2603 26.0033 9 366 0.45 0.69

21 Diliapara 91.2489 26.0492 8.6 188 0.56 1.24

22 Allagjiari 91.1936 26.0306 8.9 214 0.53 1.13

23 Bitamari 91.1297 26.0808 8.8 310 0.29 0.9

24 Michilamara 91.0892 26.0444 8.6 151 0.82 1.01

25 Vishwakama Temple 91.7156 26.1656 8.4 922 0.55 4.17

26 Patgaon 91.6017 26.0978 8.4 244 0.37 11.47

27 Bhellaguri 91.7078 26.2117 8.3 192 0.13 0.54

28 Dirgheswari 91.7428 26.2383 8.5 163 0.66 0.67

29 Azara Phc 91.5000 26.1167 7.8 206 0.3 bdl

30 Maligaon 91.6278 26.1278 8.3 806 0.32 bdl

31 Boragaon 91.6167 26.0833 8.4 710 0.33 4.55

32 Lalganesh Chariali 91.7431 26.1400 8.8 660.9 0.54 1.55

33 Fatasil Ambari 91.7258 26.0011 7 1028 0.37 2.03

34 Odalbakra 91.7464 26.1417 7.8 1199 0.8 0.17

35 Adagudam 91.7414 26.1367 7.1 1406 0.82 0.31

36 Garigaon 91.6486 26.1544 8.5 1223 0.33 5.13 37 Panbazar Circuit House 91.6819 26.1914 8.4 522 0.56 0.54

38 Auu,kahikuchi 91.6094 26.1061 8.3 136 0.23 1.63

The pH of the Ground water varies from 7 to 9 indicating slightly basic character of

the water. The value of EC varies from 1406 to 114 µs/cm at 250 C. The fluoride content of

water samples are varies from 0.13 to 1.02 mg/l that is within permissible limit. The iron

content of dug well water samples varies from 0.17 to 11.47 mg/l and from 0.37 to 5.82 mg/

lit for deep tube well sample. Location of higher concentration of iron in groundwater is


depicted in Map-11. Summary of results of chemical analysis data showing concentration of

iron in groundwater is shown in table below.

Table No. 07:- Concentration of Iron (Fe) in groundwater

Result of Water samples from dug wells Result of Water samples from deep tube wells

SI. No

Fe (mg/l) No. of samples

% No. of samples % of samples

01 0-0—0.3 16 36.36 00

02 0.3---1.00 11 25.00 4 40.00

03 >1.00 17 38.64 6 60.00

It can be seen from the above table that 64% water samples collected from dug wells

are having iron content more than the desirable limit i.e., 0.30 mg/ lit (set by BIS). And 100%

water samples collected from deep tube wells are having iron content more than the desirable

limit.

3.6 Pumping test and hydrogeological Properties of aquifer –

Eight pumping test have been conducted during aquifer mapping-2012-14 for finding

the hydrogeological properties and details of results given in tabular form-

Table No.08:- Hydrogeological Properties of Aquifer in study area.

Location Depth m

Dia in

Inch

Date Of Pumping

test

SWL (m bgl)

Q (lps)

DD (m)

T (m2/day) Sr/Sy Specific capcity (lpm/m)

Dalgaoma 103.3 6” 14-07-2014 4.3 12 1.99 1197 2.65*10-4 334 Sidhabari 107.6 8” 23-03-2014 12.5 15 4.91 1110 1.72*10-3 108 Simlitola 136.1 8” Digheli 183 8” 04-09-2013 4.75 9.2 7.21 112.8 3.11*10-3 69 Deochar 120.3 8” 24-11-2013 3.5 9.21 3.36 138.74 2.36×10-4 172 Agchia 194.45 8” 29-10-2014 2.76 12.68 2.46 227.86 2.21×10-4 259 Chamaria 200 8” 28-02-2015 4.85 12.93 3.54 808.75 4.20×10-6


3.7 Soil Infiltration studies- Infiltration test: Salient features of the test sites are provided in Table 09. A perusal of

the table shows that the tests have been conducted and the soil types encountered in the sites

are clay loam to sandy soil(as per infiltration classification). In general, infiltration test was

conducted for duration of 210 minutes.Soil infiltration studies locatio is showing in Map no.

Table 09: Salient features of Soil Infiltration the test

SI No

Location Latitude Longitude Infiltration Rate (mm/hour)

Infiltration factor

Soil Type

1 Chamaria 26˚03ʹ58ʺ 91˚10ʹ11ʺ 96 21.52 Sandy Soil 2 Lachitpur 26011'11" 91⁰38'56" 21 5.91 Sandy loam 3 Alegjari 26⁰02' 10" 91⁰11’37” 12 4.59 Loam 4 Sontali 26⁰08'47" 91⁰06' 24" 27 7.3 Sandy loam 5 Palashbari 26⁰7' 46" 91⁰34'16" 9 3.16 clay loam 6 Abhayapuri 26⁰12'42" 91⁰42'28" 9 3.28 clay loam 7 Simlitola 26˚04ʹ23ʺ 90˚55ʹ44ʺ 11 10.68 Loam 8 Matia 26˚04ʹ00ʺ 90˚47ʹ31ʺ 48 11.21 Sandy Soil 9 Bhalukjuli 26˚01ʹ15ʺ 90˚56ʹ42ʺ 42 15.38 Sandy Soil

10 Sarpara 26˚01ʹ03ʺ 90˚49ʹ52ʺ 36 11.25 Sandy Soil 11 Bahati 26˚06ʹ34ʺ 90˚49ʹ25ʺ 45 11.75 Sandy Soil 12 Digir Pam 26˚13ʹ12ʺ 90˚58ʹ10ʺ 15 5.58 Loam 13 Mahurigaon 26˚14ʹ36ʺ 90˚58ʹ19ʺ 10 8.26 Loam

14 Konra Chachra 26˚13ʹ47ʺ 90˚55ʹ26ʺ 18 5.77 Loam

15 Satra Konra 26˚14ʹ16ʺ 90˚52ʹ45ʺ 12 4.21 Loam


4. Ground Water Resources:-

As per the report on dynamic groundwater resources of Assam, 2011 the study area is

having a net groundwater availability of 545 mcm, gross annual draft of 130 mcm and stage

of development is 24%.

It is proposed to bring 60% of the net sown area under paddy cultivation and 40%

under non-paddy cultivation.

Water requirement for

- Paddy(∆=1.2m) =63446*0.6*1.2=45681 ham = 457 mcm

- Non-paddy(∆=0.3m) = 63446*0.4*0.3 =7613 ham = 76 mcm

4.1 Nos of tube well feasible in area 4.1.1 Based on available resource- By utilizing 60% of Balance dynamic groundwater resource 246 mcm and

considering unit draft 3 ham; 8220 no’s of tube wells can be constructed in the area.

4.1.2 Based on spacing

For 63446 ha of un-irrigated land and considering 200m spacing between two well

and one shallow tube wells (S.T.W) covering 4 ha area; 15861 no’s of tube wells can be

constructed in the area.

4.1.3 Based on command area As per area (un-irrigated) i.e. 63446 ha/634.46 unirrigated land and considering

command area as per shallow tube well as 3 ha, 21148 no’s of tube wells are feasible.

So, based on above calculation it appears that 8220 no’s of tube wells can be

constructed for irrigation

CGWB has established that aquifer in the area is a prolific one and this can be sustainability

development to irrigate vast non-irrigated land.

A tube yielding 36m3/hr., runs for 12 hr. /day for 150day will create a draft of

6.5ham. To meet the water requirement of 533 mcm, 8200 no’s of such tube well will be

required.


Based on available resource- Table-10: Dynamic Groundwater Resources, 2011 in the Study Area

District (p) Stage of

Ground Water

development (%)

Category Net GW Availability

(ham)

Existing Ground Water Draft for Irrigation

Existing Gross Ground Water Draft for All

Uses

Provision for Domestic & Industrial

requirement for upto 2025

Balance GW Availability for future irrigation

(ham)

Barpeta Safe 5213 2288 2505 286 2639

Goalpara Safe 14195 1988 2270 375 11832

Kamrup Safe 35067 7307 8212 1104 26656

Total 24 Safe 54475 11584 12986 1765 41127


5. Ground Water related Issues:-

5.1. Ground Water Quality:

The main issue in study area is water quality, concentration of Iron having more than

permissible limit identified in Kamrup, Goalpara, districts, Assam.

5.2 Ground Water Development:

In the study area Net sown area is 74755 ha out of which total irrigated area is 11309

ha (15%) and unirrigated area is 63446 (85%) (as per Agriculture data). Stage of ground

water development in the study area is less than 50%. From the aforesaid data it indicates that

the study area is having meager irrigation facility while having a huge ground water resource

for utilisation. Infrastructure for irrigation in the study area is very meager and oother issues

related to ground water development are- I. Majority of farmers are marginal and poor. II.

Irregular / no power supply

Table 11:- District wise net sown area

District (p) Study area

(in Ha)

Net Area Sown

(in Ha)

Land under Irrigation

(in Ha)

Land which can be brought under

Irrigation (in Ha)

Kamrup 103000 54918 10837 44081 Goalpara 25000 11540 80 11460 Barpeta 17000 8297 392 7905 Total 145000 74755 11309 63446


5. Management Strategies

The study area is having meager irrigation facility. A vast land of 63446 ha does not

have any irrigation facility, which can be brought under irrigation using the huge dynamic

groundwater resources available in the area. It is proposed to bring 60% of area under paddy

and 40% under non-paddy cultivation. Water requirement for paddy cultivation would be 457

mcm while that for non-paddy cultivation would be 76 mcm. Total water requirement to

bring this entire uncovered area under irrigation is 533 mcm.

As per the report on dynamic groundwater resources of Assam, 2011 the study area is

having a balance groundwater availability for future uses in the order of 411 mcm. If a plan is

made to develop 60% of the balance dynamic groundwater resources available (246 mcm) in

the area for the irrigation purposes then 8220 nos. of tube wells (considering a unit draft of 3

ham/yr) can be constructed in the area.

CGWB has established that aquifer in the area is a prolific one and this can be

sustainably developed to irrigate this vast land. A tube well yielding 36 m3/hr, runs for

12hrs/day for 150 days will create a draft of 6.5 ham. To meet the water requirement of 533

mcm, 8200 nos. of such tube well will be required (considering a unit draft of 6.5 ham/yr).

Extraction of 295 mcm more water from the aquifer will lower water level by 1 m which will

be easily replenished during monsoon (Avg annual rainfall 2m). Tube wells can be designed

in the study area within a depth of 50 m, tube wells can be constructed by tapping 20 m of

granular zone is expected to yield 40 m3/hr for a drawdown of 4 m. Wells may be constructed

by using 6// dia casing pipe down to 20m, 6// dia 1 to 1.5 mm slot pipes for 20m and 6// dia 10

m blank pipe.

Though huge GW resource is available but farmers in the area are poor and it may not

be possible for them to construct tube wells individually. Community based irrigation

schemes through groundwater may be taken up by Govt., which will greatly boost the socio-

economic conditions in the area. In view of the grim power situation in the area, and –

SOLAR PV Pumps would not be able to deliver the requisite water, diesel pumps are the

best available option inspite of high running cost.


Table 12:- District wise Ground Water Resource District (p) Stage of

Ground

Water

developme

nt (%)

Category Net GW

Availability

(ham)

Existing Ground

Water Draft for

Irrigation

Existing

Gross

Ground

Water Draft

for All Uses

Provision for

Domestic &

Industrial

requirement

for upto 2025

Balance GW

Availability for

future irrigation

(ham)

Barpeta

Safe 5213 2288 2505 286 2639

Goalpara

Safe 14195 1988 2270 375 11832 Kamrup

Safe 35067 7307 8212 1104 26656

Total 24

Safe 54475 11584 12986 1765 41127

Cost Estimates

One time expenditure to construct 8220 tube wells @ Rs. 2,00,000/= is Rs. 164 crores and

cost of 5 HP diesel pumps, yearly running cost and maintenance @ Rs. 91,300/= is Rs. 75

crores.

MANAGEMENT PLAN By providing irrigation facilities to 38000 ha of paddy land 1102000 quintal of food

grains (@ 2900 kg/ha) can be produced. This will boost the economy by providing Rs. 198

crores per annum income (Recent minimum price of common paddy Rs. 1800/Qn). Further,

by providing irrigation facilities to 25000 ha of non-paddy land 15, 0000 quintal of non-

paddy can be produced. This will generate an income of Rs. 8 to 45 crores per annum (recent

minimum price of vegetables Rs. 520/Qn to Rs. 3000/ Qn of oilseeds). Total one time

expenditure Rs. 239 crores. Benefit Rs. 206 to 243 crores per annum.

Groundwater in the area is infested with iron, therefore before consumption aeration/

filtering/ installation of Iron Removal Plant is necessary. At present PHED, Assam is

supplying treated drinking water in the area. Apart from this, individual houses are using sand

filter to remove iron.

Farmer’s co-operative societies may be formed which will look after maintenances of

the tube wells.


Map No-01


Map No- 2


Map No- 3


Map No- 4


Map No- 5


Map No- 6


Map No- 7


Map No- 8


Map-9


Map No-10


Map No-11



Documents

AQUIFER MAPPING - Central Ground Water Boardcgwb.gov.in/AQM/NAQUIM_REPORT/Assam/Goalpara,Kamrup,Bapeta.pdf · AQUIFER MAPPING REPORT- 2012-14 4 | P a g e because area has large reservoir