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State Profile
Ground Water Scenario
Karnataka
Area (Sq.km) |
1,91,791 |
Rainfall (mm) |
1779 |
Total Districts / Talukas |
27 districts/ 175 Talukas |
GROUND WATER MEDIUM (Hydrogeological Conditions)
The state is covered by peninsular gneisses, granites, schists, & basalts along with sedimentaries of Kaldagi and Bhima groups. The recent alluvium is restricted to coastal areas and stream courses. The water bearing and yield characteristics in hard rock are primarily controlled by the extent of weathering and fracturing. In limestone areas, solution cavities impart secondary porosity. The yield of tubewells tapping hard rocks is as high as 50 m3/hr. The tubewells in sedimentaries can yield up to 15 m3/hr.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
15.93 BCM |
Net Annual Ground Water Availability |
15.30 BCM |
Annual Ground Water Draft |
10.71 BCM |
Stage of Ground Water Development |
70 % |
Developmental Monitoring |
Over Exploited |
65 Talukas |
Critical |
3 Talukas |
Semi- critical |
14 Talukas |
Exploratory Tube wells Constructed (as on 31.03.2007) |
1197 |
No. of ground water observation wells |
1499 |
Ground Water User Maps |
27 districts |
Artificial Recharge to Ground Water (AR) |
- Area identified for AR: 36710 sq km
- Quantity of Surface Water to be Recharged: 2065 MCM
- Feasible AR structures: 1040 sub surface dams, 5160 percolation tanks/ desilting of old tanks, 17182 check dams, 8.3 lakh RTRWH with filter bed.
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AR schemes completed during VIII Plan :2
AR schemes completed during IX Plan: 2 |
Ground Water Quality Problems |
Contaminants |
Districts affected in parts |
Salinity |
Bijapur, Belgaum, Raichur, Bellary, Dharwar |
Fluoride |
Tumkur, Kolar, Bangalore, Gulbarga, Bellary, Raichur |
Enactment of Ground Water Bill to regulate and control the development of ground water:
The Karnataka Ground Water (Regulation and Control) Bill, 2002 has been finalized and efforts are being made to get it passed from the State Legislature. To be enacted.
Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:
Karnataka Government has initiated action to amend building bye-laws in major cities having population of more than 20 lakh to make rain water harvesting mandatory. To be included.
Central Ground Water Authority
Areas Notified |
For Regulation for ground water development |
NIL |
For Registration of GW abstraction Structures |
- Anekal of Bangalore (Urban) District
- Bangalore (North) of Bangalore (Urban) District
- Bangalore (South) of Bangalore (Urban) District
- Mallur of Kolar District
- Bangarapet of Kolar District
- Sidlaghhatta of Kolar District
- Chik Ballapur of Kolar Distict
- Gauribidanur of Kolar District
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Mass Awareness Programmes (as on 31.03.2007) |
17 |
Water Management Training Programme (as on 31.03.2007) |
14 |
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Ministry
of Water Resources