Nilex ec seminars 1 18-05

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Nilex ec seminars 1 18-05

  1. 1. Erosion Control Materials- North American Green Erosion Control Blankets- Gabions- Concrete Revetment Systems- Silt Fence- GeoRidge
  2. 2. Types of ErosionSheet Flow Rill Erosion Gully Erosion
  3. 3. Types of ErosionChannel Scour Erosion by Wave Action
  4. 4. Wind Erosion - Remember the Dust Bowl!
  5. 5. Problems Associated with Erosion• On-Site Loss of precious topsoil Instability of structures due to undermining Regrading and reseeding site• Off-Site Sediment Migration from site Choking and filling of lakes, streams and waterways Degrades Aquatic habitat Buries critical spawning gravel and fish eggs
  6. 6. Single & Double-Net Straw Blankets
  7. 7. North American Green Short-Term ECBs• Short-Term up to 1 year – Rapid degrading • DS75 & DS150 – Photodegradable • S75 & S150 – Biodegradable • S75BN & S150BN
  8. 8. Erosion Control Blankets• Short Term – straw (3-12) months• Extended Term- straw coconut , coconut (24- 36) months• Permanent- TRM’s, C-TRM’s
  9. 9. Slope Installation
  10. 10. Channel Installation Staple Patterns
  11. 11. Types of ErosionChannel Scour Erosion by Wave Action
  12. 12. Wind Erosion - Remember the Dust Bowl!
  13. 13. North American Green Short-Term ECBs• Short-Term up to 1 year – Rapid degrading • DS75 & DS150 – Photodegradable • S75 & S150 – Biodegradable • S75BN & S150BN
  14. 14. Ultra Short-Term ECBs• DS75 single net, 100% straw matrix• DS150 top & bottom net, 100% straw matrix• Rapid degrading thread• Performance identical to S75 & S150• Functional longevity up to 2 months• Ideal for high maintenance
  15. 15. Short-Term Photodegradable• S75: single net, 100% straw• S150; double net, 100% straw• Up to 12 mo. functionality• Netting & thread are photodegradable
  16. 16. Single & Double-Net Straw Blankets
  17. 17. C125 – Long-Term • Heavyweight UV stabilized top & bottom net • 100% coconut fiber matrix • Functional longevity up to 36 months
  18. 18. SC150 BioNet• 100% Natural materials, Leno woven top net• 70% straw/30% coconut fiber matrix• Functional longevity up to 18 months
  19. 19. C125 BioNet• 100% Natural Fiber material, Leno woven top net• 100% coconut fiber matrix• Functional longevity up to 24 months
  20. 20. BMP’s• Best management practices for soil erosion control and sediment control• Protect water quality
  21. 21. Erosion Control Prevents soil movement Sediment ControlTrap detached soil particles
  22. 22. Erosion Control/ Prevention
  23. 23. Sediment Control / Treatment
  24. 24. Where and Why Use Temporary Degradable RECPs• Anywhere land disturbing activities will take place where erosive forces exceed the limits of conventional vegetation establishment methods - Use where mulches & blown straw fail
  25. 25. Why Use Vegetation?• Low cost• Ease of use• Extremely effective• Aesthetic• Easy to maintain• Habitat benefits• Public demand
  26. 26. How ECBs Work• ECBs provide erosion protection prior to vegetation establishment – Reduce runoff velocity and volume (improve infiltration of water) – Reduce soil detachment and transportation – Absorb raindrop energy – Trap soil particles
  27. 27. Additional Benefits Of ECBs• Organic matrix materials provide mulching action to enhance vegetation establishment – Moisture absorption and retention – Reduces soil temperature fluctuation – Physically supports young plants
  28. 28. Double Net Extended - Term RECP• Temporary Degradable RECPs –
  29. 29. Double Net Long - Term RECP• Temporary Degradable RECPs
  30. 30. GeoRidge System
  31. 31. GeoRidgeSediment Control Berm • Easily installed • Effective • Permeable • Reusable • Easy to store & carry
  32. 32. GeoRidgeSediment Control Berm
  33. 33. HISTORICAL USE• Original product for this application was hay bales or rock dams• More recently, synthetic berms have been introduced to accomplish this task
  34. 34. GeoRidge Features• Length: 1 metre• Height: 230 mm• Inside width: 270 mm• Weight: 1 kilogram
  35. 35. GeoRidge Function• Reduces water velocity• Causes soil & sediment to drop out• Allows for establishment of vegetation
  36. 36. Spacing• Height of GeoRidge/slope in per cent• 2% slope – 0.23 m / .02 = 11.5 metre spacing• 6% slope – 0.23 m /.06 = 3.8 metre spacing
  37. 37. Pictures provided A.S. P. Enterprises - Omaha, NE
  38. 38. Russellville Road; Douglas County, CO March 2003
  39. 39. Channel Liner Performance Comparison Max. PermissibleMaterial Shear Stress (lbs/ft2)Blown Straw 0.00Sod 1.004” Rock Riprap 1.33Straw Coconut 1.806” Rock Riprap 2.00Coconut 2.25
  40. 40. 100% Biodegradable RECPs • Ideal for use in environmentally sensitive areas where synthetics are unwelcome. • Reduces the likelihood of wildlife entanglement. • Excellent for wetland/bioengineering sites. • Increased erosion control capabilities.
  41. 41. Biodegradable Net Weave Patterns
  42. 42. Channel Installation
  43. 43. Shoreline Installation
  44. 44. SedimentSTOP
  45. 45. Active construction sites
  46. 46. Designing with TurfReinforcement Mats (TRM’s)
  47. 47. TAKING VEGETATION TO THE HIGHEST POWER
  48. 48. SC250• Permanent Matting Structure Reinforces Vegetation High Strength• Fiber Matrix Provides Top Net Immediate Erosion Control and Assists in Seed 3-D Corrugated Germination/growth Center Net• Designed for Severe Slopes Straw/Coconut & Drainage Channels Matrix Material Slopes Channels High Strength Bottom Net
  49. 49. C350• 100% Coconut Fiber Matrix• C350 Performance Widely Documented Super High Strength Top Net• Protects Soil, Seed & Root Systems From Flowing 3-D Corrugated Center Net Water Coconut Fiber Slopes Channels Matrix Material Super High Shorelines Strength Bottom Net
  50. 50. P550• Polypropylene Matrix Increases Permanent Vegetation Reinforcement Ultra-High Strength• Excellent for Shorelines Top Net• Replacement for Rock and 3-D Corrugated Concrete Center Net Slopes Channels Polypropylene Matrix Material Ultra-High Strength Shorelines Top Net
  51. 51. TRM’sEnable Vegetation UseIn Severe Applications
  52. 52. How TRMs Work Phase 1 - Pre-emergence• Unvegetated TRM provides primary protection for seed and bare soil.• Randomly oriented fibers provide barrier for soil and seedbed from erosive forces
  53. 53. Phase 2 EstablishmentPartially Vegetated; TRM provides primaryprotection and seedling reinforcement
  54. 54. Phase III Mature Vegetation•Fully Vegetated; Vegetation provides primary erosion protection while TRM provides supplemental erosion control and vegetation reinforcement (Occurs 6-36 months after installation).•The permanent structures in the Vmax products reinforces the vegetation and provides supplemental erosion control to protect the soil from shear forces penetrating the vegetative cover
  55. 55. Permanently Reinforces & Anchors Roots & Stems
  56. 56. Mulching AspectEnhances VegetationEstablishment
  57. 57. Aesthetics AndHabitat Enhancement
  58. 58. Other Applications
  59. 59. ECONOMIC BENEFITS• Less Expensive to Install Than Soil In-filled TRMs• Up to 60% Savings Over Rock Riprap
  60. 60. Vegetated C-TRMs Outperform Rock 14.00 12.00Shear Stress Permissible 10.00 (lbs/ft2) 14 8.00 12 6.00 10 10 4.00 8 2.00 4 0.00 12 50 24 ck k k 0 0 oc oc 25 35 P5 o SC C R R R " " " 30

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