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Erosion and Sedimentation Control Workshop Why are we doing all of this?

Erosion and Sedimentation Control Workshop Why are we doing all of this?. Stripped riparian areas Increased stormwater runoff Riparian buffers along streams filter out sediment and pollutants Like rebar in concrete, roots hold banks together. Haul/Access Roads

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Erosion and Sedimentation Control Workshop Why are we doing all of this?

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  1. Erosion and Sedimentation Control WorkshopWhy are we doing all of this?

  2. Stripped riparian areas Increased stormwater runoff Riparian buffers along streams filter out sediment and pollutants Like rebar in concrete, roots hold banks together Haul/Access Roads Interruption of natural drainage patterns Some loggers plow right through stream Concentrate runoff Generate extra sediment Can be direct conduits for sediment and pollutants to the stream system Issues With Logging and OGM

  3. Sediment Effects on Aquatic Communities

  4. Damaged Gills on Fish • Sediment is very abrasive to the gills of the fish (sandpaper) • Leaves fish susceptible to disease and parasites

  5. Streambed is filled with fine sediment Fish and aquatic macro-invertebrates need open spaces in stream bottom Fills in stream and often removes overhead cover for fish Can alter fish and aquatic insect communities Fills in Streambed

  6. Blocking of sunlight • Increased sediment loads does not allow direct sunlight to hit the streambed • Hard for freshwater plants to grow • Decreases the ammount of oxygen in the water • Also inhibits feeding (can’t see prey)

  7. Increased sediment into the stream causes an increase in sediment scouring a streambank Loss of property Loss of habitat Causes even more sediment load Increased Streambank Erosion

  8. We All Live Downstream • Anything that happens here effects someone else downstream. • This area drains to both the Chesapeake Bay • The Bay is suffering from severe sedimentation • Loss of habitat and pollutants are killing the oceanic ecosystems • Nitrogen, Phosphorous, sediment, etc.

  9. Manage the forest with BMP’s Leave riparian areas along the stream Minimize concentration of flow and volume of water Outlet drainage to stable filter areas not directly into the stream What We Can Do

  10. Human impacts on aquatic communities are widespread • With preventative steps we can work in harmony with the environment

  11. QUESTIONS?

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