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Using the Vetiver Grass Technology to Protect Shorelines - Golabi
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.
3.
4. 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).
5. 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
6. Physiological Characteristics
Tolerant to:
Cold and hot weather
Fire
Water logging, inundation
Salinity
Acidity/Alkalinity
Aluminum and Manganese
Heavy metals
Herbicides/Pesticides
8. Deep, Dense and Penetrating Root System
One year
plants
3m deep
Roots
Courtesy of:
Richard Grimshaw, Chairman
The Vetiver Network
The Vetiver Network
9. 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
12. Vetiver Systems for Treating Wastewater and for Pollution
Control
The Vetiver Network
13. For Slope Stabilization and Agro forestry
(Venezuela)
Agro forestry
Slope Stabilization
Dr. Golabi participating in an
Agro-forestry project in Venezuela
14. Different uses in In China
use in landfillFor sewage water treatment and
pollution control
Slope Stabilization and
watershed management
15. Use of Vetiver Grass Technology
for Watershed Management and
Sediment Control
at the River Banks and Shorelines
21. USE OF VETIVER TECHNOLOGY FOR
RIVER BANK PROTECTION AND
SHORELINE EROSION CONTROL
22. 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
23. Application of Delta Stabilization in the
Mekong Delta, VIETNAM
The Vetiver Network
24. 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
25. What Is Vetiver GrassWhat Is Vetiver Grass
Scientific Name;Scientific Name; Vetiveria ZizanioidesVetiveria Zizanioides
Vetiver in Nature
Seedlings
26. 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
27.
28. Cross Island Road ProjectCross Island Road Project
(4treatments)(4treatments)
Burned Vetiver & Sunn Hemp
Tilled Natural Cover
29. 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.
30.
31. Case Study II – Sedimentation Mitigation at
the construction site near shoreline
Pago Bay Site