Usage
The primary uses of Kaveri are providing water for irrigation, water for household consumption and the generation of electricity.
An estimate at the time of the first Five Year Plan puts the total flow of the Kaveri at 12,000,000 acre feet (15 km3), of which 60% was used for irrigation.
The Torekadanahalli pumpstation sends 540 Mld (million liters per day) of water from Kaveri 100 km to Bangalore.
The water for the Kaveri is primarily supplied by monsoon rains. Dams, such as the Krishna Raja Sagara Dam and Mettur Dam, and those on its tributaries such as Banasura Sagar Dam project on a Kabini tributary, store water from monsoon periods and release the water during the dry months. Even so, during the months of February–May, water levels are often quite low, and some channels and distributaries riverbeds may become dry. Flow generally begins to increase in June or July. However, in some years when rains are light, the low river level can lead to agricultural distress in areas dependent upon the Kaveri for irrigation.
The hydroelectric plant built on the left Sivanasamudra Falls on the Kaveri in 1902 was the first hydroelectric plant in Karnataka.
The Krishna Raja Sagara Dam has a capacity of 49 tmc ft. and the Mettur Dam which creates Stanley Reservoir has a capacity of 93.4 tmc ft. (thousand million cubic ft)
In August 2003, inflow into reservoirs in Karnataka was at a 29 year low, with a 58% shortfall. Water stored in Krishna Raja Sagara amounted to only 4.6 tmc ft.
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