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Soil Erosion & Sedimentation

Soil Erosion & Sedimentation. Primary Causes of Soil Erosion in The US. Poor Farming Practices Exposing bare soil to wind and rainfall increases soil erosion. Plowing parallel to slopes Overgrazing by domestic animals Deforestation Construction. Results of Erosion & Sedimentation:.

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Soil Erosion & Sedimentation

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  1. Soil Erosion & Sedimentation

  2. Primary Causes of Soil Erosion in The US Poor Farming Practices Exposing bare soil to wind and rainfall increases soil erosion. Plowing parallel to slopes Overgrazing by domestic animals Deforestation Construction

  3. Results of Erosion & Sedimentation: The economic cost of soil erosion in the U.S. has been estimated as $44 billion a year. Reduction of top soil depth impairs the lands productivity

  4. Results of Erosion & Sedimentation: Transport of sediments clogs ditches, culverts and storm sewers which increases flooding

  5. Sediment fills ponds, lakes, reservoirs and waterways Sediment creates muddy or turbid lakes and streams

  6. Sediment damages aquatic habitats and reduced recreational value and use Erosion can cause undermining and structural damage to buildings, roads and other structures.

  7. Agricultural Erosion Control Measures Terracing prevents rapid surface run-off & soil erosion Contour plowing across a slope following its elevation contour lines. The rows formed have the effect of slowing water run-off during rainstorms and allows for percolation.

  8. No-Till Farming • Growing crops from year to year without tilling the soil. • Known as “chemical farming”

  9. Terracing, cover crops and retaining walls in Machu Picchu, Peru. Built about 1450

  10. Construction: Soil Erosion Problems

  11. Prevention:Woven Mats & Riprap

  12. Prevention:Straw Bale Barriers

  13. Prevention: Silt Fences

  14. Prevention:Seeding and Vegetation

  15. Prevention:Geotextiles Cellular Confinement Systems

  16. THESE ARE JUST A FEW!

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