The Jaikwadi Dam And Its Nath Sagar Reservoir : The Jaikwadi Dam And Its Nath Sagar Reservoir Vijay Diwan
Nisarg Mitra Mandal, Aurangabad
email@example.com Jaikwadi Dam : Jaikwadi Dam Largest earthen dam in Asia
Dam wall 10.2 km across
Dam height : 82 ft below 40 ft above
Catchment area 21,750 sq.km
Expenditure Planned - 800 cr. Actual - 4,700 cr. To date -11,000 cr. IrrigationPaithan left bank canal - 208 km, Paithan right bank canal - 132 kmMajalgaon Right Bank Canal - 84 km, Total command - 2,71,000 haRevised command - 1,32,000 ha, Actual – 27,500 ha, Efficiency – 15% : IrrigationPaithan left bank canal - 208 km, Paithan right bank canal - 132 kmMajalgaon Right Bank Canal - 84 km, Total command - 2,71,000 haRevised command - 1,32,000 ha, Actual – 27,500 ha, Efficiency – 15% Power Generation : Power Generation A pump-storage power house exists
A reversible turbine installed
Capacity 12 mw
Peak time power generation - 5 mw
Off-peaktime power consumption - 10 mw The Nath Sagar Reservoir : The Nath Sagar Reservoir Fed by rivers Godavari and Pravara
55 km Long & 27 km wide
Area : 339.80 sq.km or 34105 hectares
Impounds : 2909 mcm Dead storage : 1000 mcm The Nath Sagar Reservoir : The Nath Sagar Reservoir Terrain flat, waters shallow
Fills once in 3 or 4 years
Highest & lowest utilizable level difference - 10 mts
Shore line - 480 km
Typical wetland with high productivity The Nath Sagar ReservoirBenchmark Survey - 1987 : The Nath Sagar ReservoirBenchmark Survey - 1987 pH - 7.3 to 8.4
Total solids - 11.1 to 133.33 gm/ltr
Conductivity - 1.08 x 10 -² to 7.05 x 10 -³ siemens
Total hardness - 130 to 1330 mg/ltr
DO - 5.0 to 11 mg/ltr
Suitable for beers/liquors? The Nath Sagar Reservoir : The Nath Sagar Reservoir Aquatic vegetation has sps of Chara, Spirogyra, Hydrilla, Potamogeton, & Vallisneria.
Surrounding areas grow Argimone mexicana and Ipomoea fistulosa.
37 species of flora reported in the viscinity of reservoir
Seasonal farming (Gal Pera)carried out on the exposed land when the waterline recedes. The Nath Sagar Reservoir : The Nath Sagar Reservoir 30 island of various sizes in the shallow waters, with trees for roosting.
264 species of waterfowl & migratory birds.
Year 2000 IBA survey - 50,000 birds , 10,000 Demoiselle Cranes noted.
Many species reported in numbers larger than 1% of their bio-geographic population thresholds *
(* Wetlands International Norms – 2002) The Nath Sagar Reservoir : The Nath Sagar Reservoir Important stopover in migratory flyways of cranes
Species of congregatory waterfowl - 38
The site qualifies for the congregatory criteria A4-i, A4-iii and A4-iv.
[A4i (≥1% biogeographic population), A4iii (≥20,000 water birds), A4iv (known to exceed thresholds set for migratory species) ] Avifauna of Jaikwadi : Avifauna of Jaikwadi Cranes, Flamingoes, Brahmany duck, Pochards, Teals, Pintails, Shovellar, Godwits, black and glossy Ibis.
Critically endangered species are Oriental white-backed vulture, & Lesser Kestrel.
Near threatened are Darter, Painted Stork White Ibis , Lesser Flamingo & Pallid Harrier Other Key Fauna : Other Key Fauna Fishes - 43 species belonging to 27 genera, 14 families and 8 orders
Many species of mollusks, crustaceans, and other aquatic fauna
Black buck, Golden Jackal, Indian fox and black-naped hare Conservation Issues : Conservation Issues Series of dams constructed upstream and barrages downstream - blockades in the fish breeding migration path.
Use of chemical fertilizers and pesticides in farming - a potential polluting source.
Introduction of Gangetic fishes - a threat to the local fish fauna.
Sewage discharge from Aurangabad and Paithan M.I.D.C.s, and 61 surrounding villages Project viability : Project viability WRD calculations include many indirect factors to arrive at a convenient Internal Rate of Return.
An economist from BAMU has calculated IRA of the project – 7.3% (12 %).
Any delay in delivering benefits OR increase in expenditure would make
the project non-viable. The Jaikwadi project and Nath Sagar Wetland awaits further studies : The Jaikwadi project and Nath Sagar Wetland awaits further studies Let us explore the possibility to turn an un-sustainable project into a sustainable one!