Related by context. Frequent words. (Click for all words.) 64 salinity 58 Catchment 57 Groundwater 56 headwater 54 Sediment 53 irrigated agriculture 51 Vegetation 50 Watersheds 50 Drought 50 Soils 50 Floodplain 49 Seawater 49 Nitrates 49 Biochar 49 catchments 48 Erosion 48 irrigated crops 48 Effluent 48 Oxidation 48 Stormwater 48 river basins 48 groundwater 48 Evaporation 48 soils 47 Nitrogen 47 estuarine 47 freshwater ecosystems 47 saltwater intrusion 47 Didymo 47 Murray Darling Basin 47 nutrient runoff 47 Riparian 47 aquifer 47 alga 47 groundwater recharge 47 sedimentation 46 intertidal 46 sediment 46 Climatic 46 groundwater pumping 46 Geochemistry 46 Wetland 46 Watershed 46 Campaspe 46 wetland habitat 46 watersheds 46 Pollution 46 algal bloom 46 dissolved oxygen levels 46 Carbonate 46 Waitaki River 46 Microbial 46 Biodiversity Conservation 46 Murrumbidgee 46 Nutrient 46 catchment 45 Hydrology 45 Soil 45 Slurry 45 basin 45 Particulate 45 Aquifer 45 nutrient pollution 45 Nitrate 45 hydrology 45 Water Quality 45 streamflow 45 Aquaculture 45 freshwater 45 harmful algal blooms 45 Methane 45 aquatic ecosystems 45 algal blooms 45 thermocline 45 Irrigation 45 Snowpack 44 Reservoirs 44 Coral Reefs 44 coastal erosion 44 aquifers 44 Great Dividing Range 44 Inland Bays 44 nitrogen fixation 44 Bacterial 44 turbidity 44 acidification 44 hydrological 44 Greenhouse Gases 44 Moisture 44 Hypoxia 44 estuaries 44 atmospheric carbon dioxide 44 Desertification 44 Wetlands 44 GRDC 44 Coorong 43 rivers 43 Landcare 43 hydrogeology 43 irrigators 43 Pollutants