Related by context. Frequent words. (Click for all words.) 62 recharge groundwater 62 groundwater aquifers 58 water 57 streambanks 57 aquifers 57 shallow aquifer 56 reservoirs 56 underground aquifers 56 wellfields 55 seawater 55 freshwater 54 underground aquifer 54 Aquifers 53 Septic tanks 53 sewage effluent 53 aquifer 52 brackish 52 groundwater 52 salination 52 Ogallala aquifer 52 deplete oxygen 52 stormwater ponds 52 hydrologic cycle 52 desalinization plants 51 basins 51 wetland ecosystems 51 Floridan Aquifer 50 rotting vegetation 50 soil salinity 50 bd.className + = 50 brackish water 50 reservoir 50 Reverse osmosis 49 desalinated 49 fertile soils 49 Melting glaciers 49 drainage basins 49 evaporation ponds 49 miscible 49 rivers lakes 49 Soil erosion 49 reverse osmosis desalination 49 hydrological cycle 49 seawater intrusion 49 freshwater marsh 49 peat swamps 49 tributary rivers 49 artesian wells 49 basin 49 subglacial 48 soils 48 creeks rivers 48 streambeds 48 sediment 48 quaggas 48 ponds 48 Latrines 48 Potable water 48 rivers 48 saltwater 47 groundwater extraction 47 brackish waters 47 freshwater ecosystems 47 Syr Darya 47 coastal estuaries 47 riparian zones 47 Menindee Lakes 47 Raised beds 47 depleted stockpiles 47 desalting 47 icecaps 47 Great Artesian Basin 47 groundwater depletion 47 salinity 47 feedwater 47 sumps 47 estuaries 47 seabeds 47 Odd numbered addresses 47 decaying vegetation 46 toxic residues 46 waterholes 46 plankton blooms 46 watersheds 46 wetlands 46 polluted groundwater 46 groundwater basins 46 silts 46 rainwater 46 hydro lakes 46 Three Gorges reservoir 46 desalinate 46 groundwater basin 46 coulees 46 warmer wetter 46 injection wells 46 cisterns 46 eelgrass beds 46 lagoons 46 arable lands 46 tributary streams