Related by context. Frequent words. (Click for all words.) 49 groundwater aquifers 49 Aquifers 49 deltaic 48 alluvial deposits 47 Geochemistry 47 basin 46 fertile soils 46 headwater 46 Hydrological 46 reservoirs 45 Basins 45 aquifers 45 hydrogeology 44 reservoir 44 groundwater recharge 44 arid lands 44 Carbonate 44 IWRM 44 embayment 43 basins 43 Groundwater 43 sedimentary basins 43 groundwater 43 biogeochemical 43 Basin 43 rivers 43 Salinity 43 Brahmaputra River 42 aquifer recharge 42 soils 42 mud volcanoes 42 silts 42 river deltas 42 hydrological cycle 42 Sediments 42 geomorphology 42 Potable water 42 River Basins 42 methane hydrate 42 river basin 42 placer deposits 42 Reservoirs 41 salination 41 hydrological 41 marine sediments 41 sediments 41 river basins 41 Upper Cretaceous 41 sorption 41 irrigated agriculture 41 Aquifer 41 wetland ecosystems 41 hydrology 41 aquifer 40 Amu Darya 40 Watersheds 40 Paradox Basin 40 crustal 40 watersheds 40 heavily polluted 40 depositional 40 artesian wells 40 biodiversity hotspot 40 Hydrologic 40 salinity 40 karst 39 sedimentation 39 alluvium 39 glacial lakes 39 geological formations 39 Soil erosion 39 lowlands 39 Turbidity 39 freshwater 39 ecologic 39 River basin 39 shallow aquifer 39 CO2 sequestration 39 sedimentary basin 39 watershed 39 geologic formations 39 tributaries 39 upstream 39 Soils 39 Evaporation 39 gasfields 39 anoxia 39 headwaters 39 plankton blooms 38 hydrologic 38 mg l 38 arsenic contamination 38 Alluvial 38 systematics 38 ecology 38 wellfields 38 rainfed 38 irrigated crops 38 Watershed 38 inter tidal 38 terrestrial ecosystems