Related by context. Frequent words. (Click for all words.) 63 Murrumbidgee River 55 Clutha River 54 water 53 Otways 53 creek 53 Great Artesian Basin 53 Fitzroy River 52 effluent discharge 52 Lake Rotoiti 52 rivers 52 watercourse 51 creeks 51 underground aquifer 51 Waitaki River 50 Great Dividing Range 50 effluent 50 Lake Hawea 50 unnamed tributary 50 yabbies 50 hydro dams 50 Wandoan 50 headwaters 50 Berners Bay 49 stormwater drain 49 weir 49 Raw sewage 49 catchment 49 freshwater 49 waterways 49 catchments 49 Coorong 48 estuary 48 headwater 48 stormwater drains 48 treated effluent 48 tributary streams 48 Waimakariri River 48 tributaries 48 groundwater 48 pine plantation 48 tributary 47 Warrego 47 waterway 47 river 47 aquifer 47 cumecs 47 Ohau 47 Yarra River 47 bushland 47 outfall 46 Lake Lavon 46 Athabasca River 46 aquatic weeds 46 aquifer recharge 46 Lake Wakatipu 46 Murrumbidgee 46 Mokelumne 46 sediment 46 salinity 46 Wivenhoe Dam 46 Vaal River 46 waterholes 46 aquifers 46 waterhole 46 Kilcoy 46 megalitres 46 Wimmera River 46 evaporation ponds 46 Algae blooms 46 Tarawera 46 Manukau Harbour 45 Barwon Water 45 tailrace 45 downstream 45 Creek tributary 45 algal bloom 45 Reservoir 45 Harpeth River 45 upstream 45 Middle Fork 45 turbidity 45 inlet 45 Didymo 45 Bald Hills 45 billabong 45 Fleurieu Peninsula 45 tidal rivers 45 Landholders 45 hydro lakes 45 megalitre 45 Namoi 45 sewage discharges 45 weirs 45 saltwater 44 sewage 44 Catchment 44 Bunyip 44 reed beds 44 Esopus Creek 44 aquatic ecosystem 44 Murray Darling