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State Profile
Ground Water Scenario
West Bengal
Area (Sq.km) |
88,752 |
Rainfall (mm) |
2074 |
Total Districts / Blocks |
18 districts / 341 Blocks |
GROUND WATER MEDIUM (Hydrogeological Conditions)
The state can be divided into two hydrogeological unit namely fissured hard rocks & porous alluvial formations. Fissured formation includes crystalline, metasedimentary and volcanic rocks. The yield of wells tapping fractured zones varies from 10-20 m3/hr. Two third of the State is underlain by alluvial sediments mainly deposited by Ganga & Brahmaputra rivers. Based on the yield of wells tapping these alluvial sediments, aquifers of the alluvial area can be divided into three zones. 1. Yielding about 150m3/hr, occurs from Jalpaiguri to Kochbihar in north to Medinipur & 24 Parganas in South. 2. Yielding about 50-150 m3/hr, occurs in parts of Malda, Dinanjpur and western part of Murshidabad districts. 3. Yielding less than 50m3/hr, occurs as Marginal alluvial tract in parts of Birbhum, Burdawan, Bankura and Murshidabad districts.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
30.36 BCM |
Net Annual Ground Water Availability |
27.46 BCM |
Annual Ground Water Draft |
11.65 BCM |
Stage of Ground Water Development |
42 % |
Developmental Monitoring |
Over Exploited |
NIL |
Critical |
1 Block |
Semi- critical |
37 Blocks |
Exploratory Tube wells Constructed (as on 31.03.2007) |
367 |
No. of ground water observation wells |
909 |
Ground Water User Maps |
18 districts |
Artificial Recharge to Ground Water (AR) |
- Area identified for AR: 7500 sq km
- Quantity of Surface Water to be Recharged: 2664 MCM
- Feasible AR structures: 11200 percolation tanks with shafts, 3606 gabion structures, 1054 nala bund/ cement plug, 1680 re excavation of tanks, 500 desiltation of village pond, 1000 spring development, 70 sub surface dykes, 1500 RTRWH for Kolkata & Darjeeling.
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AR schemes completed during VIII Plan: 2
AR schemes completed during IX Plan: 5 |
Ground Water Quality Problems |
Contaminants |
Districts affected in parts |
Iron |
Midnapore, Howrah, Hooghli, Bankura |
Fluoride |
Birbhum |
Arsenic |
Malda, South-24 Paraganas, Nadia, Hoogly, Murshidabad, Bardhaman, Howrah |
Enactment of Ground Water Bill to regulate and control the development of ground water:
“West Bengal Ground Water Resources (Management, Control and Regulation) Bill, 2000” came into effect from 15th September 2005.
Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:
To be included.
Central Ground Water Authority
Areas Notified |
For Regulation of ground water development |
Haldia Municipal area Medinipur District |
For Registration of GW abstraction Structures |
NIL |
Mass Awareness Programmes (as on 31.03.2007) |
20 |
Water Management Training Programme (as on 31.03.2007) |
15 |
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Ministry
of Water Resources