Related by context. Frequent words. (Click for all words.) 67 Soil erosion 63 Sedimentation 62 siltation 60 salination 60 silting 60 salinization 60 groundwater depletion 59 Algae blooms 58 tributary rivers 58 toxic algae blooms 57 Snowmelt 57 seawater intrusion 57 sedimentation 56 Ice jams 56 lowland flooding 56 nutrient loading 56 Severe drought 56 shoreline erosion 56 phosphorus runoff 56 Boat capsizes 55 harmful algae blooms 55 streambanks 54 soil erosion 54 soil salinity 54 creeks rivers 54 Stormwater runoff 54 silts 54 oxbows 54 gully erosion 54 Sewage spill 54 nutrient runoff 54 rampant deforestation 54 waterflow 53 saltwater intrusion 53 silt 53 Swollen rivers 53 lakeshores 53 Naches River 53 Flooding 53 nitrate contamination 53 melting snowpack 53 sediment runoff 52 Turbidity 52 Polluted 52 riparian vegetation 52 silted 52 Severe flooding 52 recharge groundwater 52 overflowing rivers 52 eutrophication 52 headwater 51 Sinkholes 51 denudation 51 habitat degradation 51 Boat sinks 51 flooding 51 rivers 51 Salinity 51 Melting snow 51 tributary streams 51 groundwater recharge 51 Subsidence 51 aquatic weeds 51 aquifer recharge 51 overexploitation 50 mainstem 50 riparian zones 50 toxic algae bloom 50 Erosion 50 Omo River 50 endangered pallid sturgeon 50 deplete oxygen 50 nonpoint source pollution 50 aquatic habitat 50 polluted runoff 50 bd.className + = 50 nutrient pollution 50 peat swamps 50 river deltas 50 Melting glaciers 50 rapid snowmelt 50 salinity 50 overharvesting 50 Schistosomiasis 50 Rapid urbanization 50 nitrogen deposition 50 coastal estuaries 50 Drought worsens 50 ice jams 49 ponded 49 Methylmercury 49 Poyang Lake 49 eel grass 49 freshwater 49 wetlands 49 overharvest 49 oxygen depletion 49 Bus plunges 49 winterkill 49 Receding 49 dissolved oxygen levels