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Subject
Inland Waters
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188
Rivers
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188
Hydrology
105
Watersheds
94
Groundwater
70
Groundwater flow
31
Bodies of water
9
Hydrography
9
Lakes
9
Boundaries
6
Environment
5
Waterways
5
Canals
4
Drainage
4
Ponds
4
Reservoirs
4
Bays
3
Biology and Ecology
3
Godāvari River Watershed (India)
3
Indus River Watershed
3