Related by context. Frequent words. (Click for all words.) 67 watersheds 62 headwaters 59 wetlands 59 valley fills 56 streambed 56 aquatic habitat 56 spawning habitat 56 wildlife habitat 55 waterways 55 aquatic ecosystems 55 rivers 55 trout streams 55 hardwood forests 54 lakes 54 streams 54 ecosystems 53 wetland 53 estuaries 53 tributaries 53 aquatic organisms 52 aquifers 52 groundwater 51 vernal pools 51 sediment 51 river valleys 51 wildlife habitats 51 aquatic vegetation 51 ponds 50 habitats 50 oyster reefs 50 biologically diverse 50 freshwater lakes 50 wetland habitat 50 river bottoms 50 eelgrass 50 bull trout 50 tributary 49 hemlocks 49 creeks 49 habitat 49 shorelines 49 impoundments 49 Watersheds 49 river basins 49 aquifer 48 floodplain 48 forest ecosystems 48 rivers lakes 48 riverbeds 48 mountaintops 48 Clean Water Act 48 coastal ecosystems 48 watershed 48 mine tailings 48 ocean ecosystems 48 aquatic insects 48 glaciers 48 boreal 47 karst 47 watercourse 47 brook trout 47 reefs 47 groundwater recharge 47 underground aquifers 47 soils 47 vegetation 47 Appalachian Mountains 47 creek 47 estuary 47 shellfish beds 47 reservoirs 47 floodplains 47 Middle Fork 47 sedimentation 47 river basin 47 forests 46 shoreline 46 sediments 46 freshwater 46 spawning grounds 46 streamside 46 cutthroat trout 46 migratory fish 46 drainages 46 groundwater pumping 46 marine ecosystems 46 drainage basin 46 pollutants 46 coal ash 46 mountain glaciers 46 lakebed 46 seamounts 46 salt marshes 46 polluted runoff 46 peat bogs 46 coastal wetlands 46 lake 45 lagoons 45 woodlands 45 boreal forest 45 hydrologic