Slopes and Hillsides...and install your irrigation system. Runoff, erosion and efficient deep...
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57 SoCal garden plans Hardy Hillside Holders 1 Simmondsia chinensis Jojoba, Goatnut 2 Ceanothus ‘Yankee Point’ California Lilac 3 Isomeris arborea Bladderpod 4 Dalea frutescens Black Dalea 5 Baccharis pilularis ‘Pigeon Point’ Coyote Bush 1 2 3 4 5 Slopes and Hillsides are special Plan for Stabilization Working on a slope or hillside should be a collaborave process in which you should seek the advice of a licensed civil engineer, landscape architect, or other professional before grading and capturing rainwater on exisng hillsides. Get to know your soil type (see p. 22) and slope percentage (see p. 43) before moving forward with any disturbance. Whenever possible, do not disturb canyon hillsides. Select low water use plants, trees, deep-rooted nave plant species, and climate- appropriate plants with strong root structures for disturbed or built slopes and hillsides, as these root systems can help hold soil together. If your slope is gentle, 3:1 or less (33% grade) coarse compost and mulch can be applied directly to hillside and slope surfaces, providing surface protecon from the force of falling rain and shading exposed soils. With occasional irrigaon, mulch will “knit” together. Compost blankets are a kind of erosion control mat applied to the soil surface to protect and preserve it, and can be used either alone or with other organic engineered material with biodegradable grids for stabilizaon that will degrade into soil within a year or two. Compost mats allow water to penetrate through to underlying soils while retaining loose soil and debris and prevenng erosion. You can plant right through them or use pre-seeded products. Compost blankets can be found at specialized landscape products distributors. Consider working with an irrigaon design professional to design and install your irrigaon system. Runoff, erosion and efficient deep watering are important issues to keep in mind always, but especially on hillsides. Contouring across the slope can help slow, spread and sink rainwater into the planted areas and goes a long way toward reducing or eliminang any potenal runoff from irrigaon during dry months (see p. 43). Greater than 50%- revegetaon improbable without engineered soluons such as compost blankets 50% or “2:1”- revegetaon success poor Less than 25%- revegetaon success very good 25%- revegetaon success good 33% or “3:1”- revegetaon success fair Plants (CA nave grasses, shrubs), decomposing erosion control mats, compost blankets, engineered retaining walls, and stone rip rap up to 50% slope Mulches, rock, bark and CA nave grasses up to 33% slope. Bioswales ok here. © G3, Alex Stevens, 2020 Benefits Pollinators
Transcript of Slopes and Hillsides...and install your irrigation system. Runoff, erosion and efficient deep...
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SoC
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arde
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ans
Hardy Hillside Holders
1 Simmondsia chinensisJojoba, Goatnut
2 Ceanothus ‘Yankee Point’California Lilac
3 Isomeris arboreaBladderpod
4 Dalea frutescensBlack Dalea
5 Baccharis pilularis ‘Pigeon Point’Coyote Bush
1 2
3 4
5
Slopes and Hillsides are special
Plan for StabilizationWorking on a slope or hillside should be a collaborative process in which you should seek the advice of a licensed civil engineer, landscape architect, or other professional before grading and capturing rainwater on existing hillsides. Get to know your soil type (see p. 22) and slope percentage (see p. 43) before moving forward with any disturbance.
Whenever possible, do not disturb canyon hillsides. Select low water use plants, trees, deep-rooted native plant species, and climate- appropriate plants with strong root structures for disturbed or built slopes and hillsides, as these root systems can help hold soil together.
If your slope is gentle, 3:1 or less (33% grade) coarse compost and mulch can be applied directly to hillside and slope surfaces, providing surface protection from the force of falling rain and shading exposed soils. With occasional irrigation, mulch will “knit” together.
Compost blankets are a kind of erosion control mat applied to the soil surface to protect and preserve it, and can be used either alone or with other organic engineered material with biodegradable grids for stabilization that will degrade into soil within a year or two. Compost mats allow water to penetrate through to underlying soils while retaining loose soil and debris and preventing erosion. You can plant right through them or use pre-seeded products. Compost blankets can be found at specialized landscape products distributors.
Consider working with an irrigation design professional to design and install your irrigation system. Runoff, erosion and efficient deep watering are important issues to keep in mind always, but especially on hillsides. Contouring across the slope can help slow, spread and sink rainwater into the planted areas and goes a long way toward reducing or eliminating any potential runoff from irrigation during dry months (see p. 43).
Greater than 50%-revegetation
improbable without engineered solutions
such as compost blankets
50% or “2:1”-revegetation success poor
Less than 25%-revegetation
success very good
25%-revegetation success good
33% or “3:1”-revegetation success fair
Plants (CA native grasses, shrubs), decomposing erosion control mats,
compost blankets, engineered retaining walls, and stone rip rap up to 50% slope
Mulches, rock, bark and CA native grassesup to 33% slope. Bioswales ok here.
© G3, Alex Stevens, 2020
Benefits Pollinators
