Related by context. Frequent words. (Click for all words.) 49 rivers 47 River basin 47 tributary 46 oxbows 45 Brahmaputra River 44 river basins 44 tributaries 43 hydroelectric dams 43 river basin 43 River tributary 43 River 43 glacial melt 42 Zambezi river 42 Omo River 42 River Basin 42 river valleys 42 river 42 River Basins 41 Amu Darya 41 headwaters 41 hydro electric dams 40 Tungabhadra 40 headwater 40 beaver ponds 40 deltaic 40 hydropower dams 40 river deltas 40 river Brahmaputra 40 Xijiang River 40 Xingu River 40 navigable rivers 40 Presumpscot River 40 tailrace 40 Swollen rivers 40 Basin 39 hydropower 39 dammed 39 hydroelectric plants 39 heavily polluted 39 tributary streams 39 streamflow 39 rivers overflowed 39 Tagus 39 coulees 39 Lake Turkana 39 Subarnarekha 39 Sedimentation 39 backwaters 39 Nile 38 hydroelectric generating 38 misty mountains 38 Murrumbidgee River 38 Soil erosion 38 streamflows 38 Swamps 38 hydro electric 38 mainstem 38 hydroelectric 38 irrigated agriculture 38 Turag 38 Tributary 38 Yangtze 38 Hydroelectric 38 basin 38 biodiversity hotspot 38 Altamaha 38 cypress swamp 38 Sutlej river 38 dams 38 Marais des Cygnes 38 Creek tributary 37 hydro dams 37 Ganges 37 Desolation Canyon 37 wetland ecosystems 37 Mahanadi 37 arid plains 37 estuary 37 riverbanks 37 headwater streams 37 hydroelectric generators 37 River Chenab 37 Hydrological 37 oxbow 37 rivers creeks 37 Yangtze River 37 Salinity 37 hydroelectric dam 37 Harpeth River 37 deforesting 37 Chartiers Creek 36 Mahanadi river 36 freshwater ecosystems 36 Indus river 36 Ocmulgee River 36 crocodile infested 36 Hydropower 36 Elevation normal 36 creeks 36 streams creeks 36 Three Gorges Reservoir