Soil Bioengineering Methods
Compare methods for eroding slopes, streambanks and disturbed mine land. Treatment selection depends on site conditions and the problem to address.
Soil bioengineering uses living plant material as part of a restoration treatment. Wattle fences retain surface soil, and live pole drains provide paths for seepage. Rough and loose surface preparation creates protected places where vegetation can establish.
PES selects and combines living treatments, drainage, planting and conventional protection to suit the site. Water, soil, access, suitable species and establishment care all affect the choice. The techniques below support our services.
Field-Tested Techniques
From live staking and joint planting to brush layering and wattle fencing, each method is matched to the plant materials and site conditions found across British Columbia.
Site-Specific Selection
Soil, slope, water, climate and available plant material guide treatment selection. PES assesses these conditions before recommending a method.
Ecological Recovery
The goal is recovery beyond initial stabilization: techniques can create conditions for vegetation to establish and ecological function to develop over time.
The Techniques
Open a method to explore its purpose, installation approach and site requirements.
Live Staking
Dormant willow, cottonwood or red-osier dogwood cuttings are installed where species, moisture and ground conditions support rooting. Established plants can help retain surface soil and develop woody cover.
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Wattle Fencing
Living retaining walls of horizontal willow stems laid behind vertical posts, backfilled and lightly tamped down that terrace a slope into small steps, intercepting eroding material and creating protected microsites for native vegetation to establish. Used on documented slopes as steep as 70 degrees, where site conditions are suitable.
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Live Bank Protection
Dense wattle construction along a stream or river edge that forms a woody buffer protecting against lateral erosion while re-establishing functional riparian vegetation. Often combined with brush mats on high-erosion sites.
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Live Palisades
Large living cottonwood posts set by excavator beside eroding riverbanks. Suitability depends on bank conditions, water levels and whether the posts can establish.
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Live Gravel Bar Staking
Large willow and cottonwood cuttings installed in suitable gravel bars to encourage sediment deposition and woody vegetation establishment.
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Modified Brush Layers
Logs placed along the contour and anchored with live stakes form small benches that catch moving surface material and create planting sites. The method can suit dry, raveling slopes where the materials and anchoring are appropriate.
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Live Pole Drains
Trenches filled with live poles provide drainage paths for suitable seepage conditions. They may be combined with wattle fences where assessment identifies both drainage and surface-erosion needs.
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Rough and Loose Surface Treatment
An excavator creates holes and mounds across disturbed ground. This uneven surface traps seed, moisture, and organic matter and provides sheltered microsites for natural colonization.
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Live Shade
A-frame structures of live poles span a stream channel to provide shade. The diagram shows how the poles are arranged above the water; establishment depends on suitable species, moisture, and site conditions.
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Live Reinforced Earth Walls
Earth structures incorporating live willow material. Structural design, drainage and suitable growing conditions are needed for the intended support and vegetation establishment.
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Live Silt Fences
Rows of live willow, red-osier dogwood or balsam poplar cuttings slow water and trap sediment in suitable small, low-gradient channels with seasonal flow. The cuttings can develop into woody cover where conditions support establishment.
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Live Smiles
Willow bundles anchored across confined drainages in a catenary arc. The curved form works in tension against flowing silt, while the live cuttings can root where moisture and site conditions support establishment.
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Live Sills
A low-profile structure of living willow cuttings across small gullies and drainages, used to slow water and retain sediment while vegetation establishes.
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Live Gully Protection
A sequence of structures, including sills, wattle fences and live stakes, selected to slow erosion, retain sediment and support vegetation in suitable gullies. Treatment depends on flow, ground conditions and the cause of erosion.
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Pocket Planting
Individual pockets of loosened soil create planting sites in compacted or coarse ground, including mine waste rock and highway cut slopes.
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Vegetated Riprap
Rock armouring with live willow or cottonwood cuttings installed where they can reach suitable rooting conditions. Vegetation can develop alongside the rock protection when moisture, species and installation conditions permit.
Learn more →Start with the Site
Technique selection begins with soil type, slope angle, hydrology, and plant availability specific to the location.
Combine Treatments Where Needed
Living treatments, surface preparation, drainage and conventional protection can be combined where the site requires them.
Establishment Window Matters
Dormancy timing, plant-material quality and available moisture affect early establishment. Care and monitoring needs depend on the site.
Which Technique Fits Your Site?
The examples below indicate methods to consider during assessment. Final selection depends on the cause of the problem, water, soil, scale and the consequences of failure:
Stream erosion cutting a bank → live bank protection, wattle fences, live palisades
Braided channel with bare gravel → live gravel bar staking
Subsurface seepage causing slope failure → live pole drains
Overland flow eroding a slope → wattle fences, modified brush layers
Dry, well-drained slope → modified brush layers
Mine waste rock and tailings → rough and loose plus live staking
A site may require several treatments, such as drainage for seepage, wattle fences for moving surface material and live staking where cuttings can establish. PES assesses the combination and identifies where engineering or other specialist input is needed.
Field Resources That Support These Methods
Explore guidance on plant materials, treatment selection and establishment, alongside the original papers and field examples.
Not Sure Which Method Your Site Needs?
We assess slope angle, moisture regime, soil type, disturbance history, and your restoration objectives, then recommend the right technique or combination.
Serving municipal governments, mining and resource companies, developers, First Nations, and provincial agencies across British Columbia.