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State Profile
Ground Water Scenario
Nagaland
Area (Sq.km) |
16,579 |
Rainfall (mm) |
1927 |
Total Districts / Blocks |
8 districts/ 52 Blocks |
GROUND WATER MEDIUM (Hydrogeological Conditions)
Physiographically, the State consists of narrow strip of hills running from east to south west and facing the Assam plains to its north and north east. The deep aquifers are thinly bedded down to 300 m. The water table rests within 4 mbgl except in some pockets towards Naga-Patkai hills where it goes upto 12 m bgl. The yield of tubewells on the bank of Dhansiri and Diphu rivers is around 2 m3/hr. The low yield is because of finer nature of aquifer materials. Besides the foothill zones, some intermontane valleys have also been observed like at Tijit, Tiru, Longnoth and Baghty valleys. Yield of the wells in these areas vary from 16 to 62 m3/hr. The thickness of saturated zone is 30 to 70m with in 300 m depth one an average, the wells of 250 m depth can yield between 20-30m3/hr. The quality of ground water is generally good.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
0.36 BCM |
Net Annual Ground Water Availability |
0.32 BCM |
Annual Ground Water Draft |
0.009 BCM |
Stage of Ground Water Development |
3 % |
Developmental Monitoring |
Over Exploited |
NIL |
Critical |
NIL |
Semi- critical |
NIL |
Exploratory Tube wells Constructed (as on 31.03.2007) |
11 |
No. of ground water observation wells |
17 |
Ground water user maps |
4 |
Artificial Recharge to Ground Water (AR) |
- Feasible AR structures: 500 check dams, 1000 weirs, 1000 gabion structures, 300 roof top harvesting, 200 development of springs.
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AR schemes completed during IX Plan: 3 |
Enactment of Ground Water Bill to regulate and control the development of ground water:
To be enacted.
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 |
NIL |
For Registration of GW abstraction Structures |
NIL |
Mass Awareness Programmes (as on 31.03.2007) |
Nil |
Water Management Training Programme (as on 31.03.2007) |
1 |
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Ministry
of Water Resources