Related by context. Frequent words. (Click for all words.) 72 groundwater pumping 68 groundwater 61 groundwater recharge 61 aquifer 59 wastewater discharge 57 aquifers 57 streamflow 57 underground aquifer 56 watersheds 56 Edwards Aquifer 54 floodplain 54 hydrologic 54 stormwater runoff 54 saltwater intrusion 54 reservoirs 54 turbidity 54 underground aquifers 54 river basin 53 River basin 53 groundwater contamination 53 salinity 53 polluted runoff 53 river basins 53 drainage basin 52 Ogallala Aquifer 52 shoreland 52 Groundwater 52 irrigated agriculture 52 nutrient pollution 51 sedimentation 51 reservoir 51 valley fills 51 stormwater 51 freshwater 51 hydrological 50 headwaters 50 lawn watering 50 sewer overflows 50 sediment 50 wetlands 49 timber harvests 49 wetland 49 Snowpack 49 Clean Water Act 49 mountain snowpack 49 Great Lakes basin 49 mgd 49 water 49 basin 49 outdoor watering 49 septic systems 49 fecal coliform bacteria 49 wastewater 49 dissolved oxygen 49 TMDL 48 lakes 48 irrigators 48 riparian 48 snowmelt 48 snowpack 48 timber harvest 48 treated effluent 48 Swiftmud 48 Aquifer 48 impervious surfaces 48 phosphate mining 47 flood plain 47 impervious surface 47 fecal coliform 47 Reservoirs 47 Reclamation 47 River Basin 47 Lake Okeechobee 47 pollution 47 hydrologists 47 snow melt 47 effluent 47 phosphorus 47 suspended solids 47 sewage spills 47 aquatic ecosystems 46 pollutant 46 Water Quality 46 sewage overflows 46 Soil moisture 46 PUDs 46 CAFOs 46 perchlorate 46 shellfish harvesting 46 algae blooms 46 tributaries 46 Delta smelt 46 wildlife habitat 46 nitrate 46 alkalinity 46 soils 46 atrazine 45 aquatic habitat 45 snowpacks 45 coalbed methane 45 mercury contamination