Related by context. Frequent words. (Click for all words.) 53 river basin 53 Lake Lavon 53 basin 52 Creek tributary 52 aquifer recharge 52 Pueblo Reservoir 52 Elevation normal 51 Tombigbee River 51 Marais des Cygnes 51 tributary 51 River basin 51 Ogallala Aquifer 51 Bull Shoals Lake 51 Ocmulgee River 51 headwaters 51 River tributary 50 River Basin 50 drainage basin 50 river basins 50 oxbow 49 Middle Fork 49 unnamed tributary 49 Lake Tenkiller 49 Withlacoochee River 49 underground aquifer 49 Fayetteville shale 49 reservoir 48 NGL pipeline 48 Scenic Rivers 48 Spavinaw 48 Lake Texoma 48 Woodford Shale 47 groundwater pumping 47 Bend Reservoir 47 tailwater 47 basins 47 Neches River 47 creek 47 tributaries 47 Floridan Aquifer 47 Cow Creek 47 upstream 47 wastewater 47 coulee 46 aquifer 46 Toutle River 46 Ouachita River 46 Paradox Basin 46 Mississippi River 46 Water Reclamation Facility 46 reservoirs 46 diking 46 upstream reservoirs 46 Snowmelt 46 tributary streams 46 Apalachicola River 46 Flaming Gorge Reservoir 46 rivers 46 Central Flyway 46 headwater 46 Arkoma Basin 45 irrigated farmland 45 Recreational Trail 45 bottomland 45 tailwaters 45 Lake Eufaula 45 Lake Tawakoni 45 Apalachicola Chattahoochee Flint 45 Gavins Point Dam 45 groundwater basin 45 Alafia River 45 creeks 45 River 45 tailrace 45 Aquifer 45 Tributaries 45 river 45 Pigeon River 45 drainage ditch 45 Cahaba River 44 downstream 44 Cache la 44 Book Cliffs 44 detention basins 44 bottomlands 44 Roaring Fork River 44 Edwards Aquifer 44 mgd 44 Floodway 44 groundwater 44 intertie 44 trunkline 44 Creek Reservoir 44 Mokelumne 44 Water Conservancy 44 Horseshoe Bend 44 Creek 44 Grande Ronde 44 Tombigbee 44 Anticline 44 waterway