Related by context. Frequent words. (Click for all words.) 60 Olifants River 56 tidal estuary 55 heavily silted 55 wetland ecosystem 54 Hanjiang River 54 coastland 54 coastal lowlands 54 riverways 54 floating pontoon 54 freshwater springs 54 Nagarjuna Sagar 53 river catchments 53 tidal creek 53 seawaters 52 Doubtful Sound 52 deltaic 52 Kotri Barrage 52 freshwater wetland 52 navigable rivers 51 Kaipara Harbour 51 salinization 51 Vast stretches 51 Qiantang River 51 vlei 51 Altamaha River 51 Manukau Harbour 51 Wairau River 51 Subarnarekha 51 Maroochy River 51 Vaal Dam 51 Murrumbidgee River 51 Arafura Sea 51 Potable water 50 navigable waterways 50 ocean outfall 50 estuary 50 basin 50 channelization 50 mudflat 50 coastal 50 Xijiang River 50 Maribyrnong River 50 Poyang Lake 50 Dalyan 50 embayments 50 Sand dunes 50 Lake Chivero 50 saltwater marsh 50 Algoa Bay 50 watercourse 50 escarpments 50 Brahmaputra River 50 Ethiopian highlands 50 inlet 49 Three Gorges Reservoir 49 wetland vegetation 49 Pamban 49 Jinsha River 49 Zambezi River 49 Shashe 49 Huaihe 49 Lyttelton Harbour 49 Gippsland Lakes 49 Vaal River 49 groundwater aquifer 49 Zambezi river 49 salination 49 riverine 49 quay wall 49 tidal basin 49 irrigational 49 river Jhelum 49 landward 49 tablelands 49 Loch Linnhe 49 Ghaggar 49 Rivanna River 49 millrace 48 Omo River 48 Cahora Bassa dam 48 oxbows 48 Kakanui 48 hydro electric dams 48 waterways 48 Great Dividing Range 48 waterway 48 Xemxija 48 Transboundary 48 Wyangala Dam 48 Menai Strait 48 dolerite 48 reedbeds 48 Turag 48 silts 48 ecologically fragile 48 Indus basin 48 ocean basins 48 Godavari river 48 Yolo Bypass 48 stopbanks 48 river Brahmaputra