View
220
Download
1
Category
Preview:
Citation preview
Tamilnadu Hydrology Project-II
Chief Engineer, WRD State Ground & Surface Water Resources Data Centre,
Chennai-600113
DSS(Planning) for IWRD
By
SGSWRDC, TNWRD, Chennai
About SG&SWRDC
Custodian of Groundwater resources of Tamilnadu.
Assess and categorize the GW potential of the State.
Support the government in the policy matters and governance of
groundwater.
Repository of Hydrological, Hydro-meteorological , Hydro-
geological and Water Quality data.
Implemented the Hydrology Project-I and established the data
collection system.
Implements the Hydrology Project-II and develops DSS for 3
river basins and Hydrological Design Aids for balance basins
of Tamilnadu.
Synopsis on Hydrology Project-I
• Implemented during 1995 – 2003 at a cost of Rs 57.37 crore.
• Objective is to establish a Hydrological Information System (HIS) in
Tamilnadu among other States.
S.No Assets created Nos
1 Rainfall Stations (daily) 213
2 Rainfall Stations (Hourly) 57
3 Climatic Stations (manual) 45
4 Climatic Stations (automatic) 6
5 Stream flow stations 112
6 Piezometers 852
7 Water Quality (SW) 71
8 Water Quality (GW) 2074
9 Laboratories 1+3
• The HIS is well institutionalized in SG&SWRDC.
DSS Overview
Before DSS - Tank -Dry After DSS- Tank –Water Plenty
Objective of DSS
Dynamic Water budgeting at river basin scale.
To assess the spatial and temporal distribution of
Surfacewater and groundwater in the State.
Use the Water Balance information for IWRM in the
basin.
Institutionalize and sustain the DSS in the State.
Technological backing for the SWARMA.
Concept of DSS
• Integrated Water Resources Management (IWRM) covering the
following modules in the DSS (Planning) of each Basin.
Surface water Planning
Drought Management
Conjunctive use of Ground & Surface water
Reservoir Operation
Water Quality
Benefits of Decision Support System
Spatial & Temporal Assessment of Surface Water and Groundwater
in the river basin.
Judicious planning and allotment of SW and GW for a predicted
monsoon, year, decade.
Scenario Analysis of adopting different Cropping pattern and their
impact on the SW and GW resources.
Identification of sites fit for Artificial Recharge Schemes and
quantification of their impact on the Groundwater augmentation.
Spatial & Temporal distribution of WQ across the basin.
Collaborative Decision making by all stakeholders in a river basin.
Kind of DSS that the State requires
Gives the spatial and temporal water balance (SW+GW) of a
basin.
Based on a distributed 3D Hydrological model of the basin.
Take into account of the tank system on the hydrology of the
basin.
Dynamic and at daily time steps.
Simulates the SW and GW and validate them against the
observed catchment outflow and piezometric heads.
Web-enabled.
User-friendly and supports the SWARMA
Data Availability –
Readily Available
Timeseries
Rainfall (daily),
Rainfall (hourly),
Eto(daily),
GWL (monthly),
Water Quality(bi-annual)
Static
Lithology,
Cartosat-1 stereo imageries.
Basin Boundaries.
Geology maps.
Geomorphology maps.
Soil maps.
Data Availability –
Secondary data to be collected
Timeseries
Cropping pattern under
irrigation tanks and
river/canal sluices (Fasli)
Tank filling details
Reservoir
(inflow,storage,outflow)
GW abstraction from TWAD
and Industrial wells.
Static
DEM from Cartosat-1 stereo
imageries.
Location of TWAD and
Industrial wells.
Data Availability –
Primary data to be collected
Command Area maps under tanks and river/canal sluices.
Ground Control Points to calibrate the DEMs.
River/ canal Cross-sections.
Tank FTLs and Sluice levels.
Sill levels of River/Canal sluices.
Drainage network of Supply channels from weirs and surplus
courses of tanks.
Implementation Strategy
Agreement on the Tamilnadu DSS Framework.
Agreement on the modeling code and databases to be used for
the future DSSs.
Identification of basins among the agencies.
Counterparts personnel for the identified basins
between IWS + SG&SWRDC + Consultancy + PF + Regions.
Training for the Counterpart Personnel on modelling.
Vaippar
Tamiraparani Basin
Agniar Basin
Integrated Water Resources
Management (IWRM), covering SW,
GW & WQ in 3 Basins.
Basins for DSS
Present Status of DSS Goals Component Status
Goal1 For a given Monsoon
prediction, which part of
the basin can go in for
Wet/Dry crop?
1. Basin is divided into Subbasins.
2. Methodology has been evolved to populate subbasins in DSS Software with SW &
GW availability obtained from MikeSHE and MikeBasin.
3. For a given Monsoon prediction, recommended subbasins for Wet/ Dry crop will
be shown as a GIS Map.
Goal2 How much for different
sectors? How much from
SW and how much from
GW and when?
1. MikeSHE model is being set up.
2. Methodology to assess available SW & GW as a time series has been evolved.
3. Upon calibration of the models, allocation for different sectors will be assessed.
Goal3 Shall we invest in Artificial
Recharge Structures in a
particular location of the
basin? What are the
impacts on GW and SW?
1. MikeSHE model is being set up.
2. It has complete lithology and topsoil GIS Maps.
3. Upon calibration, the model will show the sites fit for ARS and impact on both the
GW & SW.
Goal4 Whether to grant a
Groundwater abstraction
permit? How much?
1. MikeSHE model is being set up.
2. All existing abstraction wells are there in the model.
3. Upon Calibration, the new abstraction well with its demand will be simulated in the
model.
4. The output will show the feasibility of issuing the abstraction permits.
Architecture of Tamilnadu DSS
Level 1
Level 2
Level 3
Administrator (1)
SG&SWRDC (5) / SWaRMA (10)
Privileges
INPUT
Add/Edit data to
selected tables,
Feedback
WRD (100)
TWAD (50)
Agri (50)
Industries ( 50)
Collectors (32)
Tahsildars ( 215)
WUA (4100 + 8000)
+
RTDAS
CM (1)
Ministers (30)
Secretaries (30)
Chief Engineers (30)
+
Public (no limit)
OUTPUT
View MikeSHE results,
Run Mike Basin
Simulations
INPUT
Feedback
OUTPUT
View and download
Data
Text/Graphic/ Map
Reports (PDF),
for different users levels.
Stakeholders
INPUT
Control
Administration
Back-up
Recovery
Improvement
Output
Feedback
Hired Web/Database Server
Operational Structure of DSS
RDBMS
Internet / WAN Internet Server
WRD Agri Revenue
Policy makers Technocrats Farmers
State
Water
Authority
HDA DSS
Basin Info System
in GIS
Public
Drinking
Input Data
Output Reports
Industry
Data
Sharing
Towards a Multi-criteria Collaborative Decision Making in Water Resources Management in a River basin
Hydrological Models & DSS in Tamilnadu
Mike Basin
DSS Solution Software
MikeSHE
GW
(R
ech
arg
e/ A
va
ilab
ility
)
SW
(R
ive
r F
low
)
SW
(Tan
ks/ D
ete
ntio
n S
tora
ge
)
Pre Defined Scenario Outputs
Database with all GIS, TS, Results
Technology developed by DHI, now under testing
Technology developed by DHI, now under testing
Technology developed by DHI, now under testing
Technology developed by DHI, now under testing
Non Command Area digitization
DSS Progress - Vaippar
Command Areas under each Tank
DSS Progress - Tamiraparani
DSS Progress - Agniar
Why Decision Support System?
2004 2005 2006
2007 2008 2009
IMD Predicts an Above
or Below Normal
North-East
Monsoon!
How DSS can
help us?
2010
Conclusion
The Decision Support System, on its completion, will be
the Technological backing for the State Water Resources
Management Authority (SWaRMA).
It will way for better water resources management at
river basin framework.
Thokkalikadu Weir
THANK YOU
Recommended