erosion control

1. Erosion ControlErosion Control
•Physical MethodsPhysical Methods
•Vegetative MethodsVegetative Methods
•Biotechnical MethodsBiotechnical Methods
•Control of GulliesControl of Gullies

2. Goals:Goals:
•Control of WaterControl of Water
•Restore the sponge effect ofRestore the sponge effect of
native soilnative soil

3. Ground CoverGround Cover

6. • Happens on
a tiny scale
• Repeats
over and
over
• Can become
a huge
problem
Where it all startsWhere it all starts
R. Douglas

7. • Raindrop
• Sheet
• Rill
• Gully
• Channel
Types of erosionTypes of erosion
USFS
Stream DiversionCulvert Scour

11. StabilizingStabilizing
Roads andRoads and
ConstructionConstruction
Sites in PalauSites in PalauBob GavendaBob Gavenda USDA-NRCSUSDA-NRCS

12. inadequate waterinadequate water
managementmanagement

13. erosion fromerosion from
unprotectedunprotected
constructionconstruction
sitessites

14. 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

15. 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

16. 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

17. PHYSICAL METHODS

30. VEGETATIVE METHODS

32. mulched,mulched,
fertilizedfertilized
& seeded& seeded

40. BIOTECHNICAL METHODS

46. AMANCO-Colombia

49. • 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

50. GULLY STABILIZATION