|
|
State Profile
Ground Water Scenario
Andhra Pradesh
Area (Sq. km) |
2,75,069 |
Physiography |
- The Coastal Plain
- The Eastern Ghat
- The Western Pedeplain
|
Drainage |
The state is drained by three major perennial rivers viz. Godavari, Krishna and Pennar and several other rivers of lesser significance |
Rainfall |
Varies from 561 mm in Rayalsema Region to about 1113 mm in the northeastern part of the state. |
Total Districts / Mandals |
23 districts / 1104 Mandals |
GROUND WATER MEDIUM (Hydrogeological Conditions)
Nearly 84% of the State is underlain by hard crystalline and consolidated formations like Archaean, Cuddapah, Dharwars, Kurnool, Deccan Traps etc. The rest of the State is underlain by semi-consolidated formation like Gondwanas and Tertiaries and unconsolidated deposits like Recent alluvium. The yield of wells ranges between 2-5 m3/hr in Dharwars comprising schist, phyllites, amphibolites and epidiorites. In granite gneiss, khondalites and charnokites, the yield ranges between 10-35 m3/hr. In Cuddapahs, the yield ranges between 7-50 m3/hr. In shales and Deccan traps, the yield ranges between 0.5-1.5m3/hr and 10-40 m3/hr, respectively. The yield of wells in soft rocks like Gondwana sand stone varies from 12-220 m3/hr. The alluvial formations are confined mainly in the delta region where the tubewells yield from 15-60 m3/hr.
GROUND WATER EXPLORATION/SOURCES FINDINGS
Dynamic Resources |
Annual Replenishable Ground water Resource |
36.50 BCM |
Net Annual Ground Water Availability |
32.95 BCM |
Annual Ground Water Draft |
14.90 BCM |
Stage of Ground Water Development |
45 % |
Developmental Monitoring |
Over Exploited |
219 Mandals |
Critical |
77 Mandals |
Semi- critical |
175 Mandals |
Exploratory Tube wells Constructed (as on 31.03.2007) |
1251 |
No. of Ground Water Observation Wells |
981 |
Ground Water User Maps |
23 districts |
Artificial Recharge to Ground Water
(AR) |
- Area identified for AR: 65,333 sq. km.
- Quantity of Surface Water to be Recharged: 1095 MCM
- Feasible AR structures: 3800 Percolation Tanks, 11167 Check Dams, RWH in Urban Areas
|
AR schemes completed during VIII Plan: 1
AR schemes completed during IX Plan: 10 |
Ground Water Quality Problems |
Contaminants |
Districts affected in parts |
Salinity |
East Godavari, West Godavari, Krishna, Guntur, Prakasam |
Fluoride |
Prakasam, Nellore, Anantapur, Nalgonda, Rangareddy, Adilabad |
Enactment of Ground Water Bill to regulate and control the development of ground water: Andhra Pradesh Water, Land and Trees Act, 2002 covering whole State has been enacted with effect from 19.04.2002.
Inclusion of Roof Top Rain Water Harvesting (RTRWH) in building by laws:
Andhra Pradesh Water, Land and Trees Act, 2002 covering whole State has been enacted with appropriate provision of RTRWH making it mandatory for new Buildings on plots area of 200 sq. m or more.
Central Ground Water Authority
Areas Notified |
For Regulation of ground water development |
- Midijil Mandal of Mahabubnagar District.
- Tirupathi (rural) Mandal of Chittor District
- Vempalli Mandal of Cuddapah district.
|
For Registration of GW Abstraction Structures |
- Armur Mandal of Nizamabad District.
- Husnabad Mandal of Karimnagar District
- Bachchannapet Mandal of Warangal district.
- Rolla of Ananthapur district
- Kadiam of East Godavari district
- Sodam of Chittor district
- Medchal of Ranga Reddy district
- Chityal of Nalgonda district
|
Mass Awareness Programmes (as on 31.03.2007) |
19 |
Water Management Training Programme (as on 31.03.2007) |
16 |
|
Ministry
of Water Resources