CENTRAL GROUND WATER BOARD
State Profile
Ground Water Scenario of Arunachal Pradesh
Area (Sq.km) |
83,743 |
Rainfall |
2872(average annual) |
Total Districts / Blocks |
17 Districts |
Hydrogeology
The entire foothill belt running along the Himalayan front can be correlated to the “Bhabar belt” of Ganga basin with exception of some areas of Lohit and Tirap Districts. Ground water occurs under unconfined to semi-confined conditions. In Namsai and Mino sub-divisions, the depth to water level is essentially governed by topography. Sediments down to 106 meters below ground level (m.bgl) are predominantly sandy and discharge of tube wells ranges up to 54m3/hr.
Dynamic Ground Water Resources (2011) |
|
Annual Replenishable Ground water Resource |
4.51 BCM |
Net Annual Ground Water Availability |
4.06 BCM |
Annual Ground Water Draft |
0.003 BCM |
Stage of Ground Water Development |
0.08 % |
Ground Water Development & Management |
|
Over Exploited |
NIL |
Critical |
NIL |
Semi- critical |
NIL |
Artificial Recharge to Ground Water (AR) |
|
Feasible AR structures:
|
|
Ground Water Quality Problems |
|
Contaminants |
Districts affected (in part) |
Salinity (EC > 3000 µS/cm at 25 ° C) |
|
Fluoride (>1.5 mg/l) |
|
Iron (>1.0 mg/l) |
Changlang, Lohit. Papumpare, Tirap |
Nitrate (>45 mg/l) |
|
Arsenic(above 0.05 mg/l) |
|
Heavy metals: |
|
Central Ground Water Authority
Areas Notified for Regulation for ground water development |
NIL |