Related by context. Frequent words. (Click for all words.) 67 Coorong 53 gigalitres 51 freshwater 50 rivers 50 catchments 50 salinity 49 irrigated agriculture 48 estuary 48 aquatic ecosystems 48 catchment 47 aquatic ecosystem 47 freshwater ecosystems 47 waterbirds 47 Salinity 47 algal bloom 46 freshwater lakes 46 river basins 46 Murray Darling 46 lakes 46 Athabasca River 45 aquatic habitat 45 algal blooms 45 estuaries 45 biota 45 freshwater mussels 45 lungfish 45 river basin 44 Murray Darling Basin 44 Murrumbidgee 44 trout fishery 44 River Basin 43 River basin 43 Goolwa 43 marine ecosystems 43 basin 43 Catchment 43 biodiversity 43 freshwater fish 43 headwater 43 Yarra River 43 river 42 salmonids 42 Waitaki River 42 River tributary 42 tributaries 42 River 42 freshwater lake 42 Coho salmon 42 tributary 41 acidification 41 Didymo 41 Apalachicola River 41 oxygenation 41 waterways 41 seagrasses 41 headwaters 41 irrigated crops 41 mainstem 41 wetland habitats 41 weir 41 aquifers 41 aquatic species 41 aquifer 41 storages 40 streamflows 40 water 40 marine biodiversity 40 dissolved oxygen levels 40 Great Barrier Reef 40 eutrophication 40 aquaculture 40 ocean acidity 40 Severe drought 40 reservoirs 40 Great Dividing Range 40 transboundary 40 Yarra 40 Fitzroy River 39 lake 39 overexploitation 39 coastal ecosystems 39 silting 39 rivers lakes 39 toxic algae 39 Murraylands 39 Sharman Stone 39 tailwaters 39 wetland habitat 39 terrestrial ecosystems 39 irrigators 39 species 39 ecosystems 39 bio diversity 39 watercourse 39 siltation 39 habitat 39 estuarine 38 watersheds 38 salmon fisheries 38 hydrological cycle 38 groundwater