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State Profile
Ground Water Scenario
Bihar
Area (Sq.km) |
94,163 |
Rainfall (mm) |
1232 |
Total Districts / Blocks |
37 districts / 589 Blocks |
GROUND WATER MEDIUM (Hydrogeological Conditions)
Hydrogeologically, the various litho-units of the State can be grouped as unconsolidated / Alluvial formation; semi-consolidated formations and consolidated/fissured formations. The main alluvial tract covers entire north Bihar and a sizeable area south of the Ganga River. These alluvial formations constitute prolific aquifers where the tubewell can yield between 120-247m3/hr. The potentiality of these aquifer decreases due south in the marginal tract. Auto flow conditions occur in the sub-Tarai region of Madhubani, Sitamarhi and West Champaran districts. In the hard rock areas of South Bihar, borewells located near lineaments/fractures can yield between 10-50 m3/hr.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
29.19 BCM |
Net Annual Ground Water Availability |
27.42 BCM |
Annual Ground Water Draft |
10.77 BCM |
Stage of Ground Water Development |
39 % |
Developmental Monitoring |
Over Exploited |
NIL |
Critical |
NIL |
Semi- critical |
NIL |
Exploratory Tube wells Constructed (as on 31.03.2007) |
255 |
No. of ground water observation wells |
373 |
Ground Water User Maps |
38 districts |
Artificial Recharge to Ground Water (AR) |
- Area identified for AR: 1650 sq. km.
- Quantity of Surface Water to be Recharged: 574 MCM
- Feasible AR structures: 891 Percolation Tanks, 2260 Check Dams, 1630 Recharge Shaft, 1303 Contour Bunding, RWH in Urban Areas
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AR scheme completed during IX Plan: 1 |
Ground Water Quality Problems |
Contaminants |
Districts affected in parts |
Salinity |
Begusarai |
Iron |
Champaran, Muzaffarpur, Gaya, Munger, Deoghar, Madhubani, Patna, Palamau, Nalanda, Nawada, Banka |
Fluoride |
Giridih, Jamui, Dhanbad |
Arsenic |
Bhojpur and Patna |
Enactment of Ground Water Bill to regulate and control the development of ground water:
Bihar Ground Water (Regulation & Control of Development and Management) Act, 2006 enacted and notified on 29.01.2007 by the State Government of Bihar.
Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:
To be included.
Central Ground Water Authority
Areas Notified |
For Regulation |
NIL |
For Registration of GW abstraction Structures |
NIL |
Mass Awareness Programmes (as on 31.03.2007) |
15 |
Water Management Training Programme (as on 31.03.2007) |
6 |
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Ministry
of Water Resources