Related by context. Frequent words. (Click for all words.) 72 salination 68 Soil erosion 62 siltation 59 soil erosion 58 rampant deforestation 58 salinity 58 saltwater intrusion 57 saturated soils 57 species extinctions 57 eutrophication 57 sedimentation 57 nutrient runoff 56 silting 56 frequent droughts 55 prolonged droughts 55 desertification 55 Salinity 55 lowland flooding 55 toxic algae blooms 54 severe droughts 54 riparian vegetation 54 polluted runoff 54 Stormwater runoff 54 groundwater aquifers 54 acidification 54 overexploitation 54 nutrient loading 54 acidify 54 nitrification 54 periodic droughts 53 floods droughts 53 overfishing pollution 53 ecological degradation 53 plankton blooms 53 groundwater extraction 53 soils 53 rotting vegetation 53 shoreline erosion 52 overgrazing 52 coastal erosion 52 Murrumbidgee River 52 Melting glaciers 52 ponding 52 biodiversity hotspot 51 Severe drought 51 hydrological cycle 51 environmental degradation 51 deforestation 51 thawing permafrost 51 algal blooms 51 aquifer recharge 51 heavy rainfall 51 heavy rainfalls 51 bilharzia 51 acidifying 51 upwellings 51 desiccation 51 monsoonal rains 51 snow melt 51 worsening droughts 51 freshwater ecosystems 50 habitat fragmentation 50 wetland ecosystems 50 deplete oxygen 50 incessant rainfall 50 silts 50 groundwater recharge 50 Algae blooms 50 drier summers 50 nonpoint source pollution 50 Lake Alexandrina 50 algal bloom 50 catchments 50 arable lands 50 habitat degradation 50 sediment runoff 50 Turbidity 50 dieback 50 aquatic weeds 50 vegetation 49 irrigated agriculture 49 groundwater pumping 49 subsidence 49 Rapid urbanization 49 nutrient uptake 49 deltaic 49 silt 49 sediment 49 sewage effluent 49 ocean acidity 49 seagrasses 49 flooding 49 Desertification 48 prolonged drought 48 Droughts 48 melting snowpack 48 aquifers 48 glacial lakes 48 aquatic habitats 48 Omo River 48 inundation