Related by context. Frequent words. (Click for all words.) 66 basin 66 Basins 60 River Basin 55 River basin 54 basins 54 River 50 Piceance 49 Reservoir 48 Anticline 48 river basin 47 Middle Fork 47 Creek 46 River Watershed 46 headwaters 46 river basins 45 headwater 45 mainstem 45 aquifer recharge 44 Gippsland Basin 44 Niobrara 44 Fault Zone 44 Snake River 44 sedimentary basin 44 Uinta Basin 44 Watershed 44 coalbed methane CBM 44 Anadarko Basin 44 Matagorda Bay 44 Creek Watershed 43 Flaming Gorge 43 Reservoirs 43 streamflows 43 Creek tributary 43 undeveloped acreage 43 Surat Basin 43 estuary 43 Gulch 43 Salinity 43 rivers 43 Lagoon 43 Woodford Shale 42 alluvial deposits 42 streamflow 42 Fayetteville shale 42 Bight 42 Catchment 42 Flats 42 drainage basin 42 Alluvial 42 Aquifer 42 Carbonate 42 Floodplain 42 sedimentary basins 42 Creek Reservoir 42 tributaries 42 Arkoma Basin 42 Pipeline 42 Valley 42 reservoirs 41 farmout 41 South Timbalier 41 Salt Creek 41 Groundwater 41 Suisun Marsh 41 Lodgepole 41 groundwater basin 41 undrilled 41 Irrigation District 41 River tributary 41 drainages 41 Bakken shale 41 Petsec 41 Mokelumne 41 tributary 41 Galilee Basin 41 gasfields 41 Piceance Basin 40 irrigators 40 Watersheds 40 Powder River 40 tailwaters 40 Geologically 40 areal extent 40 Powder River Basin 40 Jolly Ranch 40 Yampa River 40 Carnarvon Basin 40 Granite Wash 40 Klamath 40 Albany Shale 40 Willapa Bay 40 Metolius 40 Utica Shale 40 Australian Bight 40 reservoir 40 coalbed methane 40 acreage 40 aquifer 40 Lake 40 Washita 40 upstream