Central Ground Water Board

Ministry of Water Resources
Government of India

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State Profile

 

Maps of Hydrogeology, Physiography and categorisation of Kerala

District Profiles of Kerala

 

 

 

State Profile
Ground Water Scenario of Kerala

 

Area (Sq.km)

38,863

Rainfall (mm)

3073

Total Districts / Blocks

14 districts / 154 Blocks

Hydrogeology

Physiographically, the state can be divided into three zones namely the Coastal plains, the Midlands and the Hill ranges. Major portion of the State is underlain by the crystalline rocks of Archaean age. Sedimentary formations of Eocene to Recent overlie these crystalline rocks along the coastal belt. The tubewells tapping the aquifers in crystalline rocks yield between 6-10 m3/hr. The midland area is capped by laterites where the yield of tube well varies from 10-15 m3/hr. In the coastal area, where Tertiary formations possess promising aquifers, the tube wells yield 12-15 m3/hr under free flow conditions.

Dynamic Ground Water Resources

Annual Replenishable Ground water Resource

6.84 BCM

Net Annual Ground Water Availability

6.23 BCM

Annual Ground Water Draft

2.92 BCM

Stage of Ground Water Development

47 %

Ground Water Development & Management

Over Exploited

5 Blocks

Critical

15 Blocks

Semi- critical

30 Blocks

Ground Water User Maps

14 districts

Artificial Recharge to Ground Water (AR)

  • Area identified for AR: 4650 sq km
  • Quantity of Surface Water to be Recharged: 1078 MCM
  • Feasible AR structures:  4312 check dams, 7181 sub surface dykes, 10780 gully plugs, 10780 nalah bunds, RTRWH (0.7 lakh houses) , run off water harvesting (1200 structures)

AR schemes completed during VIII Plan: 5
AR schemes completed during IX Plan: 13

 

Ground Water Quality Problems

Contaminants

Districts affected (in part)

Salinity  (EC > 3000 µS/cm at 25 ° C)

Palakkad

Fluoride (>1.5 mg/l)

Palakkad

Iron (>1.0 mg/l)

Alappuzha, Ernakulam, Idukki, Kannur, Kasaragod, Kollam, Kottayam, Kozhikode, Malappuram, Palakkad, Pathanamthitta, Thiruvananthapuram, Thrissur, Wayanad

Nitrate  (>45 mg/l)

Alappuzha, Idukki, Kollam, Kottayam, Kozhikode, Malappuram, Palakkad, Pathanamthitta, Thiruvananthapuram, Thrissur, Wayanad

Enactment of Ground Water Bill to regulate and control the development of ground water: 
The “Kerala Ground Water (Control and Regulation) Act, 1997” has been enacted.

Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:

Roof top RWH has become mandatory as per Kerala Municipality Building (Amendment) Rules, 2004 for all new buildings.

Central Ground Water Authority



Areas Notified for Regulation of ground water development

NIL

Mass Awareness Programme (as on 31.03.2010)

21

Water Management Training Programme (as on 31.03.2010)

19

 
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