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State Profile
Ground Water Scenario
Delhi
Area (Sq.km) |
1483 |
Physiography |
- Masudpur-Wazirabad Ridge
- Older Alluvial Plain
- Yamuna Flood Plain
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Drainage |
The state is drained by river Yamuna |
Rainfall (mm) |
Average Annual rainfall:
Safdarjung-712 mm |
Total Districts |
9 Districts / 27 Tehsils |
GROUND WATER MEDIUM (Hydrogeological Conditions)
The Ground water availability in the territory is controlled by the hydrogeological situation characterized by occurrence of alluvial formation and hard rocks such as quartzite. The hydrogeological set up and the following distinct physiographic units further influence the ground water occurrence: (1) Older Alluvial Plain on the eastern and western side of the ridge. (2) Yamuna Flood Plain deposits. (3) Isolated and nearly closed Chattarpur alluvial basin. (4) NNE-SSW trending Quartzite Ridge. The yield of tubewells ranges between 18-144 m3/ hr in Yamuna Flood Plain aquifers. In Older Alluvium of eastern and western sides of the ridge, the yield of tubewells ranges between 12 to 36 m3/ hr. Tubewells constructed in Chattarpur alluvial basin tapping the aquifers of both alluvium and weathered and fractured quartzite yield about 9 to 27 m3 / hr. Discharge of tubewells constructed in Quartzites varies from 6-15 m3 / hr.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
0.30 BCM |
Net Annual Ground Water Availability |
0.28 BCM |
Annual Ground Water Draft |
0.48 BCM |
Stage of Ground Water Development |
170 % |
Developmental Monitoring |
Over Exploited |
7 blocks |
Critical |
NIL |
Semi- critical |
NIL |
Exploratory Tube wells Constructed (as on 31.03.2007) |
142 |
No. of ground water observation wells |
87 |
Ground Water User Maps |
9 districts |
Artificial Recharge to Ground Water (AR) |
- Area identified for AR: 693 sq. km.
- Quantity of Surface Water to be Recharged: 444 MCM
- Feasible AR structures Percolation Tanks: 23, Check Dams and nala bunds: 10,
- RWH in Urban Areas: 21735
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AR schemes completed during VIII Plan: 1
AR schemes completed during IX Plan: 16 |
Ground Water Quality Problems |
Salinity |
The ground water is fresh at all depths in the areas around the ridge in the Central, New Delhi, South and Southwest Districts and also Chattarpur basin. In the areas west of the ridge, ground water is generally brackish with fresh water is existing down to 25 to 30 m only. In the flood plains of Yamuna, in general, fresh water aquifers exist down to 30-45 m. |
Fluoride |
Especially in southwest, west and parts of north-west districts. |
Enactment of Ground Water Bill to regulate and control the development of ground water:
The State Government proposes to amend the Delhi Water Board Act to accommodate concerns expressed in the Model Bill, draft of which has since been prepared and at consultation stage.
Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:
Ministry of Urban Development and Poverty Alleviation vide notification dated the 28th July 2001 has included Roof Top Rain Water harvesting in building byelaws for a plot of 100 sq. m or more. All buildings having minimum discharge of 10,000 litres and above per day have been advised to incorporate wastewater recycling system which should be used for horticulture purposes.
Central Ground Water Authority
Areas Notified |
For Regulation of ground water development |
- South West District
- South District
- Yamuna Flood Plain area
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For Registration of GW abstraction Structures |
- East District
- New Delhi District
- North East District
- North West District
- West Delhi District
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Mass Awareness Programmes (as on 31.03.2007) |
22 |
Water Management Training Programme (as on 31.03.2007) |
19 |
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Ministry
of Water Resources