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Everest Landscaping & Erosion Control Everest Landscaping & Erosion Control ServicesServicesKalyan Thapa,Kalyan Thapa,Operations ManagerOperations Manager Erosion Prevention, Restoration and Land reclamation using soil Bioengineering Erosion Prevention, Restoration and Land reclamation using soil Bioengineering techniquestechniques

"Winning is important to me,"Winning is important to me,but what brings me real joy isbut what brings me real joy isthe experience of being fullythe experience of being fullyengaged in whatever engaged in whatever I'm doing” - Phil JacksonI'm doing” - Phil Jackson

Picture of slope protection using soil Picture of slope protection using soil BioengineeringBioengineering

techniques in the project under City of Edmontontechniques in the project under City of EdmontonSaskatoon river bank protection.Saskatoon river bank protection.

Soil bioengineering (SB) uses live plant materials to provide erosion control, slope Soil bioengineering (SB) uses live plant materials to provide erosion control, slope and stream bank stabilization, landscape restoration, and wildlife habitat. These and stream bank stabilization, landscape restoration, and wildlife habitat. These techniques are used alone or in conjunction with conventional engineering techniques are used alone or in conjunction with conventional engineering techniques. Kalyan Thapa, has over 15 years of experiencetechniques. Kalyan Thapa, has over 15 years of experience in the in the use of soil use of soil bioengineering to treat problem sites and have worked in countries of Nepal, bioengineering to treat problem sites and have worked in countries of Nepal, Canada, Bhutan, India and East Timor.Canada, Bhutan, India and East Timor.

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WHAT IS SOIL BIOENGINEERING?WHAT IS SOIL BIOENGINEERING?

Bio-engineering is the use of living vegetation, either alone or In Bio-engineering is the use of living vegetation, either alone or In conjunction with civil engineering structures and non-living plant conjunction with civil engineering structures and non-living plant material, to reduce shallow-seated instability and erosion.material, to reduce shallow-seated instability and erosion.

Pictures of before and after of the Brush layers installation.Pictures of before and after of the Brush layers installation.

2008 Sep2008 Sep 2010 June2010 June

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HISTORY OF SOIL BIOENGINEERINGHISTORY OF SOIL BIOENGINEERING

Financial restrictions of pre-war years Financial restrictions of pre-war years (1930’s) in Germany and Austria(1930’s) in Germany and Austria

favoured the use of low cost local favoured the use of low cost local materials and traditional construction materials and traditional construction methods for public works projects. This methods for public works projects. This

was a big boost to the development was a big boost to the development of new soil bioengineering of new soil bioengineering

techniquestechniques..

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HISTORY OF SOIL BIOENGINEERINGHISTORY OF SOIL BIOENGINEERING

(Lisa Lewis, U.S.D.A. 2000)(Lisa Lewis, U.S.D.A. 2000)

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ADVANTAGE OF SOIL ADVANTAGE OF SOIL BIOENGINEERINGBIOENGINEERING

Control of accelerated erosion while Control of accelerated erosion while re-establishing native vegetation re-establishing native vegetation and restoring surface hydrology. and restoring surface hydrology.

Cost-effective treatments for Cost-effective treatments for landslides, roadside failures, river landslides, roadside failures, river stream banks and mining stream banks and mining reclamationreclamation

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EXAMPLE OF THE MAJOR EXAMPLE OF THE MAJOR BIOENGINEERING TECHNIQUESBIOENGINEERING TECHNIQUES

Live hardwood cuttings (≈ 20 mm dia., 500 mm length) laid in shallowLive hardwood cuttings (≈ 20 mm dia., 500 mm length) laid in shallowtrenches. These give immediate and increasingly strong protection trenches. These give immediate and increasingly strong protection

and and reinforcement. As with grass planting, they can also be angled to reinforcement. As with grass planting, they can also be angled to enhance drainage enhance drainage

1. 1. Brush Layers:Brush Layers:

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TYPICAL DESIGN OF BRUSH LAYERS AND TYPICAL DESIGN OF BRUSH LAYERS AND STRAW WATTLESSTRAW WATTLES

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22. . Grass plantingGrass plantingLarge grass clumps, usually planting in lines across the slope. Large grass clumps, usually planting in lines across the slope. Lines are usually horizontal to maximize the protection against Lines are usually horizontal to maximize the protection against erosion. Grass slips should plant at 100mm centers within rows erosion. Grass slips should plant at 100mm centers within rows and row spacing 500mm in most slopes. and row spacing 500mm in most slopes.

Grass planting in horizontal configurations for road side slope protection Grass planting in horizontal configurations for road side slope protection Experience in Nepal.Experience in Nepal.

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TYPICAL CONFIGURATIONS OF TYPICAL CONFIGURATIONS OF GRASS PLANTINGGRASS PLANTING

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3. Live pole drains:3. Live pole drains:Live pole drains (a tube of about 300 mm diameter of live Live pole drains (a tube of about 300 mm diameter of live cuttings) are laid in shallow trenches across the slope. They cuttings) are laid in shallow trenches across the slope. They prevent surface scour and gullying. These poles can be laid in prevent surface scour and gullying. These poles can be laid in two ways: along the contour; or in a herring bone patterns (fish two ways: along the contour; or in a herring bone patterns (fish bones) to double as to improve surface drainage system.bones) to double as to improve surface drainage system.

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Vegetated riprap incorporates a combination of riprap class 1 (40mm - 450 mm) and class 2 (200 mm - 800 mm) and native vegetation in the form of live cuttings.

The cuttings are planted in conjunction with the placement of rock along watercourses.

 

• Establishment of vegetation will improve fish habitat and provide added bank protection through development of root mass.

• Provides a softer more natural appearance to the installed rocks.

4. Vegetation Riprap

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Vegetated Riprap: Slope Application

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VEGETATION RIPRAP

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VEGETATION RIPRAP

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Grass and tree seedlings planted at intervals. Roots penetrate Grass and tree seedlings planted at intervals. Roots penetrate relatively deeply and provide reinforcement and anchorage. They take relatively deeply and provide reinforcement and anchorage. They take a few years to establish properly and serve their full function. Plants a few years to establish properly and serve their full function. Plants spacing to be at 1000mm centers in off-set rows and rows 1000mm spacing to be at 1000mm centers in off-set rows and rows 1000mm apartapart

5. Slope planting with grass and trees5. Slope planting with grass and trees

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6. Wattle and Live fence6. Wattle and Live fence

Live fence is a line of closely spaced shrubs and treeLive fence is a line of closely spaced shrubs and treespecies, is planted and trained in such a way as tospecies, is planted and trained in such a way as toform a barrier or to mark the boundary of an area.form a barrier or to mark the boundary of an area.Fences used to separate a road from adjoining fieldsFences used to separate a road from adjoining fieldsor one house from another, and of sufficient age to or one house from another, and of sufficient age to incorporate larger trees, are known as hedgerows. Itincorporate larger trees, are known as hedgerows. Itis also provides an aesthetic view and habitations ofis also provides an aesthetic view and habitations ofnatural creatures in the property. natural creatures in the property.

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Live fence InstallationLive fence Installation

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Wattle fence Wattle fence installationinstallation

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Surface protection with stone pitching is strengthened Surface protection with stone pitching is strengthened by planting vegetation in the gaps. This is flexible but by planting vegetation in the gaps. This is flexible but provides very strong armouring in periodic stream provides very strong armouring in periodic stream channels, without the cost of concrete mortar.channels, without the cost of concrete mortar.

7. Vegetation stone pitching7. Vegetation stone pitching

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SITE SPECIFIC TECHNIQUESSITE SPECIFIC TECHNIQUES

There are numerous options for individual site There are numerous options for individual site solutions, depending on specific site requirements.solutions, depending on specific site requirements.Particular designs are best undertaken in conjunction Particular designs are best undertaken in conjunction with small scales engineering structures. Examples:with small scales engineering structures. Examples:

Soil trimming/removalSoil trimming/removal Coir or Jute nettingCoir or Jute netting Stone rip-rapStone rip-rap Stone check dam Stone check dam Stone toe wall.Stone toe wall.

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Specific erosion control Specific erosion control measuresmeasures

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Live materials (Cotton wood Live materials (Cotton wood and Willow cuttings) and Willow cuttings)

harvesting and soaking.harvesting and soaking.

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Thank You !Thank You !

If you hear you forget, if you see If you hear you forget, if you see you understand if you do you you understand if you do you

learnlearnFor more information:For more information:Kalyan ThapaKalyan Thapa, Operations Manager, Operations ManagerEverest Landscaping and Erosion Control Everest Landscaping and Erosion Control

ServicesServices152 - 7478 138 St, 152 - 7478 138 St, Surrey, BC, V3W 6G4Surrey, BC, V3W 6G4Phone – (604) 803 8256(Cell) (604) 595 3428 Phone – (604) 803 8256(Cell) (604) 595 3428

(Res)(Res)E-mail- E-mail- ktinearth@gmail.comktinearth@gmail.com