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
26. 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
27.
28.
29. Why Use Vegetation?
• Low cost
• Ease of use
• Extremely effective
• Aesthetic
• Easy to maintain
• Habitat benefits
• Public demand
30. 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
31. 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
47. HISTORICAL USE
• Original product for this application
was hay bales or rock dams
• More recently, synthetic berms
have been introduced to
accomplish this task
48. GeoRidge Features
• Length: 1 metre
• Height: 230 mm
• Inside width: 270 mm
• Weight: 1 kilogram
49. GeoRidge Function
• Reduces water velocity
• Causes soil & sediment to drop out
• Allows for establishment of vegetation
50.
51.
52.
53.
54. 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
61. Channel Liner
Performance Comparison
Max. Permissible
Material Shear Stress (lbs/ft2)
Blown Straw 0.00
Sod 1.00
4” Rock Riprap 1.33
Straw Coconut 1.80
6” Rock Riprap 2.00
Coconut 2.25
62. 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.
102. 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
103. 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
104. 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
107. 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
111. 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
