Related by context. Frequent words. (Click for all words.) 61 underground aquifer 59 aquifer 58 underground aquifers 57 reservoirs 56 aquifers 53 groundwater 52 basin 52 reservoir 52 groundwater pumping 52 River basin 51 Ogallala Aquifer 50 groundwater recharge 49 wellfield 49 water 48 river basins 48 river basin 48 headwaters 47 basins 46 irrigate crops 46 recharge 46 Aquifer 46 watersheds 45 irrigation 45 mgd 45 Groundwater 45 Edwards Aquifer 45 drainage basin 45 Garrison Dam 44 streamflows 44 lakes 44 River Basin 43 irrigated agriculture 43 bottomland 43 Reservoir 43 recharging 43 submersible pumps 43 streamflow 43 ponds 43 storage caverns 43 streambeds 43 Lake McConaughy 43 wetlands 43 rivers 43 irrigate 43 lakebed 43 drainage basins 42 lake 42 treated effluent 42 wetland habitat 42 irrigation canals 42 wells 42 retention basins 42 Basin 42 wastewater 42 Reservoirs 42 dams 41 tailwaters 41 subsoil moisture 41 hydrologic 41 hydrology 41 River tributary 41 Water Conservancy 41 irrigation pumps 41 wetland 41 tributaries 41 tailwater 41 waterlines 41 Water Resources 41 Friant Dam 41 irrigators 40 hydrological 40 irrigated 40 freshwater 40 manmade lake 40 aquatic habitat 40 river crests 40 wastewater treatment 40 Water Supply 40 water mains 40 riparian habitat 40 hydropower 40 bottomlands 40 Lake Sakakawea 39 sandy soils 39 river 39 salt caverns 39 potable water 39 fertile soils 39 electricity 39 sewer mains 39 headwater 39 hydroelectric plants 39 irrigating 39 geologic formations 39 saltwater intrusion 39 arid regions 39 potable 39 Soil moisture 39 Irrigation 39 fish hatchery 39 lagoons