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9. lvrm ch 13 14 ukraine- erosion control-eb

erosion control

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9. lvrm ch 13 14 ukraine- erosion control-eb

  1. 1. Erosion ControlErosion Control •Physical MethodsPhysical Methods •Vegetative MethodsVegetative Methods •Biotechnical MethodsBiotechnical Methods •Control of GulliesControl of Gullies
  2. 2. Goals:Goals: •Control of WaterControl of Water •Restore the sponge effect ofRestore the sponge effect of native soilnative soil
  3. 3. Ground CoverGround Cover
  4. 4. • Happens on a tiny scale • Repeats over and over • Can become a huge problem Where it all startsWhere it all starts R. Douglas
  5. 5. • Raindrop • Sheet • Rill • Gully • Channel Types of erosionTypes of erosion USFS Stream DiversionCulvert Scour
  6. 6. StabilizingStabilizing Roads andRoads and ConstructionConstruction Sites in PalauSites in PalauBob GavendaBob Gavenda USDA-NRCSUSDA-NRCS
  7. 7. inadequate waterinadequate water managementmanagement
  8. 8. erosion fromerosion from unprotectedunprotected constructionconstruction sitessites
  9. 9. Ngerikiil WatershedNgerikiil Watershed erosion from different land useserosion from different land uses land useland use relative erosionrelative erosion roadsroads 244244 developeddeveloped 6 – 396 – 39 agricultureagriculture 2.5 – 1642.5 – 164 grasslandgrassland 0.5 - 490.5 - 49 forestforest 11
  10. 10. General Erosion Control and Revegetation Plan A Description of Project 1.Project Objectives 2.Project Location 3.Work Plan 4.Description of Local Environment B Planning 1. Site Analysis a.Climate and Microclimate b.Vegetation Spectrum c.Soils, Erosion Potential, and Fertility 2. Project Scheduling to Minimize Area of Disturbance (Stage Construction?) 3. Physical, Vegetative, or Biotechnical Measures?? A Mix? 4. Water and Sediment Control, Ground Cover Measures 5. Developing the Revegetation Plan a.Plant Species Selection c. Aesthetics b.Site Preparation d. Sources 6.Types of Plant Materials a.Seeds c. Tublings b.Cuttings d. Other Container Plants 7. Importance of Ecotypes and Use of Native Species
  11. 11. General Erosion Control and Revegetation Plan C Implementation 1. Purchasing and Placing Fencing, Ground Cover, Mats, Etc. 2. Planting Methods--Cuttings and Transplants – Tools and Materials – Planting Holes and Methods 3. Planting Methods--Seeding and Mulching – Hydroseeding - Fertilizer – Range Drills - Holding Mulch in Place – Type and Quantity of Seed -Tackifiers – Type and Quantity of Mulch -Netting 4. Other Planting Methods--Biotechnical – Live Stakes - Brush Layering – Wattling - Brush Matting 5. Timing – Fall versus Spring Planting – Summer Plantings Advance Planning 6. Hardening-off and Holding Plants (Acclimatized) 7. Handling Live Brush and Cuttings D Maintenance and After Care 1. Short and Long-term Care Irrigation Weed Control Fertilization Replanting 2.Plant Protection Wire Caging, Fencing the Entire Site
  12. 12. PHYSICAL METHODS
  13. 13. VEGETATIVE METHODS
  14. 14. mulched,mulched, fertilizedfertilized & seeded& seeded
  15. 15. BIOTECHNICAL METHODS
  16. 16. AMANCO-Colombia
  17. 17. • Minimize Site Disturbance • Schedule Work to Reduce Erosion Risk • Use Locally Available Materials • Cover Disturbed Areas • Control Water Flow • Install EC Measures Prior to Rain • Save Organic Topsoil • Separate Clean and Dirty Water • Rehabilitate Disturbed Areas Progressively SUMMARYSUMMARY Key Erosion Control Measures
  18. 18. GULLY STABILIZATION

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