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Ground Water is a Precious National Resource - Preserve it, Protect it and Don't Pollute it.

State Profile

 
Ground Water Scenario of Karnataka


Area (Sq.km)

1,91,791

Rainfall (mm)

1779

Total Districts / Talukas

30 Districts

Hydrogeology 

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 tube wells tapping hard rocks is as high as 50 m3/hr. The tube wells in sedimentaries can yield up to 15 m3/hr.


Dynamic Ground Water Resources (2009)

Annual Replenishable Ground water Resource

16.81 BCM

Net Annual Ground Water Availability

14.81 BCM

Annual Ground Water Draft

10.01 BCM

Stage of Ground Water Development

68 %

Ground Water Development & Management

Over Exploited

71 Talukas

Critical

11Talukas

Semi- critical

34 Talukas

Artificial Recharge to Ground Water (AR)

  • Area identified for AR: 74007 sq km
  • Volume of water to be harnessed: 11367 MCM
  • Volume of water to be harnessed through RTRWH:167.33 MCM
  • Feasible AR structures: 59853 Check dams; 271 sub-surface dykes; 2695 Point Recharge structures; 665000 RTRWH (H); 35000 RTRWH (G& I)

 

Ground Water Quality Problems

Contaminants

Districts affected (in part)

Salinity  (EC > 3000 µS/cm at 25 ° C)

Bagalkote, Bangalore-Rural, Bangalore-Urban, Belgaum, Bellary, Bijapur, Chamarajnagara, Chikballapur, Chikmagalur, Chitradurga, Dakshina Kannada, Davanagere, Dharwad, Gadag, Gulburga, Hassan, Haveri, Kodagu/ Coorg, Kolar, Koppal, Mandya, Mysore, Raichur, Ramanagara, Shimoga, Tumkur, Udupi, Uttara Kannada, Yadgir

Fluoride (>1.5 mg/l)

Bagalkot,  Bangalore, Belgaum, Bellary, Bidar, Bijapur, Chamarajanagar, Chikmagalur, Chitradurga,  Davanagere, Dharwad, Gadag, Gulburga, Hassan, Haveri, Kolar, Koppal, Mandya, Mysore, Raichur, Tumkur

Iron (>1.0 mg/l)

Bagalkot, , Bangalore, Belgaum, Bellary, Bidar, Bijapur, Chamrajnagar, Chikmagalur, Chitradurga,  Davanagere, Dharwad, Gadag, Gulburga, Hassan, Haveri, Kodagu, Kolar, Koppal, Koorg, Mandya, Mysore, Raichur. Shimoga, Tumkur, Udupi, Uttar Kannada.

Nitrate  (>45 mg/l)

Bagalkot,  Bangalore, Belgaum, Bellary, Bidar, Bijapur,  Chikmagalur, Chitradurga,  Dakshina Kannada, Davanagere, Gulburga, Hassan, Haveri, Kodagu, Kolar, Koppal, Mysore, Raichur, Shimoga, Tumkur, Udupi, Uttar Kannada

Central Ground Water Authority


Areas Notified for Regulation of ground water development
  • Badami, District Bagalkote
  • Bagalkote(P), District Bagalkote
  • Anekal, District Bangalore (U)
  • Bangalore (N), District Bangalore (U)
  • Bangalore (S), District Bangalore (U)
  • Devanhalli, District Bangalore(R)
  • Dod Ballapur , District Bangalore(R)
  • Hoskote, District Bangalore(R)
  • Nelamangala(P), District Bangalore(R)
  • Ramdurg, District Belgaum
  • Raybag(P), District Belgaum
  • Gadag(NC), District Gadag
  • Bangarapet, District Kolar
  • Chik Ballapur, District Chikballapur
  • Chintamani, District Chikballapur
  • Gauribidanur, District Chikballapur
  • Gudibanda, District Chikballapur
  • Malur, District Kolar
  • Mulbagal, District Kolar
  • Sidlaghhatta, District Chikballapur
  • Koratagere(P), District Tumkur
  • Madhugiri(P), District Tumkur