A river is generally a natural watercourse that runs perennially or seasonally from definite sources (e.g. hills, rivers, waterbodies), with defined banks, contributes to the water and sediment budget of the basin/catchment, and discharges into an outfall (e.g. rivers, waterbodies, Bay of Bengal). A socially and historically recognized watercourse will also be considered as a river.

North-West 313 28 341
North-Central 87 28 115
North-East 318 33 351
South-West and South-Central 133 252 385
South-East 69 22 91
Eastern-Hills 0 52 52
920 415 1335
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North-West 0 222 341
North-Central 45 30 115
North-East 32 140 351
South-West and South-Central 224 5 385
South-East 37 8 91
Eastern-Hills 22 9 52
594 733 1335
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North-West 1 340 341
North-Central 0 115 115
North-East 0 350 351
South-West and South-Central 310 75 385
South-East 14 77 91
Eastern-Hills 20 31 52
345 988 1335
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North-West 338 3 0 341
North-Central 115 0 0 115
North-East 351 0 0 351
South-West & South-Central 385 0 0 385
South-East 90 0 1 91
Eastern-Hills 52 0 0 52
1331 3 1 1335
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