Related by context. Frequent words. (Click for all words.) 44 basins 37 basin 36 salt caverns 35 gas hydrates 34 waterways 34 wetlands 33 drainage ditches 33 dissolved solids 32 lagoons 32 streambeds 32 groundwater 32 storage tanks 32 sediment 32 silt 31 rock formations 31 subsurface 31 wetland 31 underground aquifer 30 rivers 30 drainage basin 30 geological formations 30 ponds 30 peat bogs 30 river basin 30 geologic formations 30 sumps 29 geologically 29 aquifers 29 reservoirs 29 groundwater recharge 29 groundwater pumping 29 undrilled 28 underground aquifers 28 sediments 28 water 28 shale 28 shale gas 28 tailings 28 lakes 28 coal seams 28 estuaries 28 dams 27 headwaters 27 deepwater 27 arid regions 27 oilfields 27 hydrocarbons 27 estuary 26 watercourse 26 weirs 26 diking 26 impoundments 26 glacial lakes 26 Creek tributary 26 freshwater lakes 26 creeks 26 landforms 26 Ogallala Aquifer 26 fluvial 26 reservoir 26 watersheds 26 shale deposits 26 silty 26 sedimentary basins 26 coalbed methane 25 Harding MLB.com 25 hydrocarbon 25 hydrocarbon reserves 25 hydrologic 25 Sediment 25 landmasses 25 submersible pumps 25 geologic 25 dewatering 25 drainages 25 aquifer 24 lithium brine 24 Marc Gonsalves 24 watercourses 24 outfalls 24 meltwater 24 drainage 24 freshwater 24 irrigated agriculture 23 hydrology 23 geological 23 tributaries 23 limestones 22 Navy frigate 22 Keith Stansell 22 Marine Pfc 22 river basins 22 Aquifer 22 River basin 22 Basins 22 tributary 22 Geologically 22 onshore 21 wells 21 salar 21 hydrological