Related by context. Frequent words. (Click for all words.) 56 underground aquifer 53 headwaters 52 Omo River 51 forested wetlands 51 navigable rivers 51 headwater 51 agriculturally rich 50 fertile plains 50 groundwater aquifers 50 shallow aquifer 50 spawning habitat 50 underground aquifers 50 headwater streams 50 tributary streams 49 riparian vegetation 49 fertile soils 49 coulees 49 artesian wells 49 Aquifers 49 cypress swamp 49 native brook trout 49 mudflat 49 arid lands 49 grazing pastures 49 alluvial deposits 48 limestone cave 48 oxbows 48 coastal estuaries 48 limestone caves 48 aquifers 48 tidal marshes 48 beaver ponds 47 phosphate mines 47 gulches 47 rock outcrops 47 coastland 47 sandstone formations 47 lakes 47 Creek tributary 47 temperate rainforest 47 largely uninhabited 47 irrigated farmland 46 cypress swamps 46 pupfish 46 riparian habitat 46 coastal bluffs 46 lava tubes 46 Fryingpan River 46 aquifer 46 Raton Basin 46 artesian 46 irrigation ditches 46 Yellowstone cutthroat trout 46 freshwater 46 lush farmland 46 Hanford Reach 46 waterholes 46 overgrazed 46 trout hatchery 46 diked 46 waterpower 46 bottomlands 46 pasturelands 45 rivers 45 alpine lakes 45 wetland ecosystems 45 Coho salmon 45 freshwater mussels 45 intertidal zone 45 alfalfa fields 45 aquifer recharge 45 arid climates 45 mussel species 45 arid 45 aquatic invertebrates 45 placer deposits 45 Hetch Hetchy Reservoir 45 trout stream 45 irrigated agriculture 45 freshwater ponds 45 Book Cliffs 45 watersheds 45 oxbow 45 biodiversity hotspot 45 streambeds 45 tributaries 45 freshwater wetlands 45 graze livestock 45 groundwater pumping 45 streambed 44 Strawberry Reservoir 44 Agua Fria River 44 bottomland 44 evaporation ponds 44 Hiking trails 44 river bottoms 44 fertile farmland 44 Pend Oreille River 44 water 44 reservoirs 44 limestone formations