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Using the Vetiver Grass Technology to Protect Shorelines - Golabi

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70th SWCS International Annual Conference
July 26-29, 2015
Greensboro, NC

Published in: Environment
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Using the Vetiver Grass Technology to Protect Shorelines - Golabi

  1. 1. Using Vetiver Grass System toUsing Vetiver Grass System to protect Water from Sedimentationprotect Water from Sedimentation and other Pollutionand other Pollution Mohammad H. GolabiMohammad H. Golabi Professor of Soil and Environmental SciencesProfessor of Soil and Environmental Sciences College of Natural and Applied SciencesCollege of Natural and Applied Sciences University of GuamUniversity of Guam Presented at thePresented at the 7070thth Annual SWCSAnnual SWCS Greensboro, NCGreensboro, NC
  2. 2. The Basic concept of Vetiver Grass Technology  The Vetiver Grass Technology (VGT), in its most common form, is simply the establishment of a narrow (less than 1 meter wide) live stiff vetiver grass barrier, in the form of a hedge, across the slope of the land.  When applied correctly the technology is effective on slopes from less than 1 to over 100%. A well-established Vetiver grass hedge will slow down rainfall runoff, spreading it out evenly, and will trap runoff sediments to create natural terraces.  In addition its massive root system will increase the shear strength of soil (thus providing improved stability of soils on steep slopes).
  3. 3. VETIVER SYSTEMS APPLICATIONS  ••Soil and Water Conservation  •Land Reclamation  •Slope Stabilization  •Disaster Mitigation  •Interface between Water and Structures  •Improved Water Quality and Remediation of  Polluted Sites  •Agricultural Uses  •Other Uses
  4. 4. Physiological Characteristics  Tolerant to:  Cold and hot weather  Fire  Water logging, inundation  Salinity  Acidity/Alkalinity  Aluminum and Manganese  Heavy metals  Herbicides/Pesticides
  5. 5. OTHER CHARACTERISTICS (Its Root System)
  6. 6. Deep, Dense and Penetrating Root System One year plants 3m deep Roots Courtesy of: Richard Grimshaw, Chairman The Vetiver Network The Vetiver Network
  7. 7. Six Month old Vetiver plant – Dakar, Senegal. In the background, Vetiver planted “by the meter” or in strips to speed up transplanting in erosion control sites. The Vetiver Network
  8. 8. Extensive and Deep Root Systems Venezuela case display
  9. 9. Some other Uses Waste Water Treatment
  10. 10. Vetiver Systems for Treating Wastewater and for Pollution Control The Vetiver Network
  11. 11. For Slope Stabilization and Agro forestry (Venezuela) Agro forestry Slope Stabilization Dr. Golabi participating in an Agro-forestry project in Venezuela
  12. 12. Different uses in In China use in landfillFor sewage water treatment and pollution control Slope Stabilization and watershed management
  13. 13. Use of Vetiver Grass Technology for Watershed Management and Sediment Control at the River Banks and Shorelines
  14. 14. End Goal Stop Erosion From Source Stop Major Sediment Outfalls
  15. 15. Coral Reef Degradation As the Result of Severe Soil Erosion Photo (Anae Island, Guam) by David Courtesy of Dr. Minton, NPS
  16. 16. Mud in Pauliluc Bay Courtesy of Dr. Minton, NPS
  17. 17. Healthy Coral Reef Photo (11 miles reef, Guam) by David Burdick Courtesy of Dr. Minton, NPS
  18. 18. Converting Badlands to Green lands Badland Six Months after Planting
  19. 19.  USE OF VETIVER TECHNOLOGY FOR RIVER BANK PROTECTION AND SHORELINE EROSION CONTROL
  20. 20. Vetiver Systems for Flood Control Flood protection of Sea Walls - Vietnam 2005 In 2005 Vietnam experienced its worst typhoons in 60 years. Trial plantings of Vetiver proved very effective in preventing breaching of sea walls. The Vetiver Network
  21. 21. Application of Delta Stabilization in the Mekong Delta, VIETNAM The Vetiver Network
  22. 22. Vetiver Systems - The Interface between Water and Structures Vetiver hedgerows protecting the inside curve of a highway in Malaysia from river water damage The Vetiver Network
  23. 23. What Is Vetiver GrassWhat Is Vetiver Grass  Scientific Name;Scientific Name; Vetiveria ZizanioidesVetiveria Zizanioides Vetiver in Nature Seedlings
  24. 24. Case Study I: X-Island Road Project Use of Vetiver Technology to control erosion as a watershed management strategy for water quality improvement and natural resource preservation in southern Guam
  25. 25. Cross Island Road ProjectCross Island Road Project (4treatments)(4treatments) Burned Vetiver & Sunn Hemp Tilled Natural Cover
  26. 26. Size and slope of the study plots Management practices (Soil surface conditions) Soil loss (tons/ha/yr)Area ha Length m Slope % 0.0037 21.95 12 Burn 14.13 0.0037 21.95 12 Vetiver 1.47 0.0037 21.95 12 Till 104.75 0.0037 21.95 12 Natural 5.22 Table 2: Annual Soil loss from each plot with different treatments.
  27. 27. Case Study II – Sedimentation Mitigation at the construction site near shoreline  Pago Bay Site
  28. 28. Pago Bay construction site before a big rain
  29. 29. Pago Bay construction site after a big rain
  30. 30. Mitigation Project
  31. 31. Showing runoff path
  32. 32. Showing runoff path cont’d
  33. 33. At maturity after 6 month
  34. 34. Time to cut
  35. 35. Cutting at hip height
  36. 36. Showing at work trapping sediment
  37. 37. More HedgesMore Hedges
  38. 38. A year later two additional hedges were planted to ensure healthy hedges for complete beach protection from sedimentation and Erosion
  39. 39. A distant view of the ‘Green Wall’ protecting the ocean
  40. 40. Examples of Coastal Areas that could be protected and/or preserved by using Vetiver System/ Technology
  41. 41. Coastal areas damaged by erosion that could be protected by using this technology
  42. 42. Coastal areas that could be protected and preserved using this technology
  43. 43. Thank You Si Yuus MaaseSi Yuus Maase
  44. 44. Any Question?Any Question?
  45. 45. Six years after plantingSix years after planting
  46. 46. Vetiver hedgesVetiver hedges

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