Related by context. Frequent words. (Click for all words.) 53 freshwater 51 estuaries 51 delta smelt 49 estuary 49 Delta smelt 49 groundwater basin 48 Apalachicola River 47 delta 47 aquatic ecosystem 47 underground aquifer 47 drainage basin 47 groundwater pumping 47 river basins 47 basin 47 Great Lakes basin 46 tidal wetlands 46 polluted runoff 46 coastal wetlands 46 salmon fishery 46 riparian habitat 45 spawning grounds 45 Friant Dam 45 chinook salmon 45 saltwater intrusion 45 spawning habitat 45 Great Lakes Compact 45 headwaters 45 underground aquifers 45 spawning beds 45 Upper Klamath 45 wetlands 44 river basin 44 migratory fish 44 seagrass beds 44 freshwater wetlands 44 aquifer 44 aquifers 44 irrigated agriculture 44 freshwater ecosystems 44 River basin 44 groundwater 44 watersheds 44 aquatic ecosystems 43 reservoirs 43 Apalachicola Bay 43 weirs 43 Ogallala Aquifer 43 wetland habitat 43 Chinook salmon 43 steelhead trout 43 tidal marsh 43 Coho salmon 43 wetland habitats 43 estuarine 43 freshwater lake 43 freshwater lakes 43 coastal waters 43 marine ecosystem 43 rivers 42 tidelands 42 Lake Okeechobee 42 endangered salmon 42 ocean ecosystems 42 groundwater recharge 42 tributaries 42 coastal marshes 42 Klamath River 42 waterways 42 fragile ecosystem 42 microscopic algae 42 Mokelumne River 42 headwater 42 water 42 river deltas 42 Willapa Bay 42 Raw sewage 41 Murray Darling 41 seagrasses 41 hydroelectric dams 41 CalFed 41 aquatic habitat 41 lakes 41 waterway 41 Snake River dams 41 dams 41 sewage discharges 41 salmon 41 Indus river 41 Caloosahatchee River 41 Klamath Basin 41 habitat 41 wildlife habitat 41 endangered species protections 40 Murray Darling Basin 40 underwater grasses 40 Edwards Aquifer 40 irrigation 40 River tributary 40 wetland 40 wildlife habitats 40 migrating salmon