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 331 30 361
North-Central 93 28 121
North-East 352 36 388
South-West and South-Central 137 261 398
South-East 72 23 95
Eastern-Hills 0 52 52
985 430 1415
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North-West 0 361 361
North-Central 58 63 121
North-East 72 316 388
South-West and South-Central 377 21 398
South-East 68 27 95
Eastern-Hills 39 13 52
614 801 1415
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North-West 0 361 361
North-Central 0 121 121
North-East 0 388 388
South-West and South-Central 321 77 398
South-East 14 81 95
Eastern-Hills 20 32 52
355 1060 1415
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North-West 358 3 0 361
North-Central 121 0 0 121
North-East 388 0 0 388
South-West & South-Central 398 0 0 398
South-East 94 0 1 95
Eastern-Hills 52 0 0 52
1411 3 1 1415
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