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Module 3: Bioretention Structures

Module 3: Bioretention Structures. Melanie Mills, MLA Central Coast LIDI. What is a bioretention area?. depressed planting area receives flows from small drainage areas has special soil mix allows stormwater to be retained stormwater can infiltrate into the native soil

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Module 3: Bioretention Structures

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  1. Module 3: Bioretention Structures Melanie Mills, MLA Central Coast LIDI

  2. What is a bioretention area? depressed planting area receives flows from small drainage areas has special soil mix allows stormwater to be retained stormwater can infiltrate into the native soil specially selected plants

  3. Bioretention Areas

  4. Bioretention Areas • depressed planting area • open bottom • receives stormwater (DMAs) • has special soil mix • allows stormwater to be retained • stormwater infiltrates to the native soil • has specially selected plants

  5. Bioretention Areas

  6. Basic Types sloped sides flat bottom

  7. Characteristics of Types High Point Community, SvR Design • Sloped Sides (rain garden, linear swale) • Edge transition achieved w/ planting surface (shelf) • Landscape condition differs (ponding at bottom)

  8. Characteristics of Types photo: SvR Design • Flat Bottom (planter) • requires more structure at edges (walls) • edge considerations for pedestrian interface (curb) • one landscape condition (ponding across entire surface)

  9. Advantages to Types High Point Community, SvR Design Contra Costa C3 Manual • Sloped Sides (rain garden, linear swale) • reduced cost of structural components (walls/deep curbs) • landscaped slope may be perceptually less abrupt for peds

  10. Advantages to Types • Flat Bottom (planter) • fits in constrained sites • urban sensibility • 100% of area functions El Cerrito rain gardens, photo: bluegreenbldg.org Glashaus condominiums, Emeryville, photo: bluegreenbldg.org

  11. Applications An Vo, Landscape Architecture Cal Poly SW 12th Ave., Portland, Kevin Perry Central Coast LIDI Sites Streets Parking Lots

  12. Applications photo: Tracy Tackett, SPU Stephen Epler Building, Portland, OR Hidden Creek, photo: bluegreenbldg.org • Sites • single family • housing developments • commercial/ civic buildings

  13. Applications High Point Community, SvR Design City of Portland, Environmental Services SW 12th Ave., Portland, Kevin Perry • Streets • street edge swale • street edge planter cells • curb extensions and bulbs • medians

  14. Applications Northgate Mall, SvR Design Morton Arboretum, Illinois El Monte, photo: Bill DeFoto • Parking Lots • between stalls linear • end bulbs • buffer required landscape

  15. Pedestrian Considerations Portland, photo: Andy Rowe SW 12th Ave., Portland, Kevin Perry High Point Community, SvR Design adjacent parking access safe conveyance features curb along planters crossing swales/planters 2% shelf at pedestrian edge

  16. LID Transformations BEFORE SW 12th Ave., Portland, Kevin Perry

  17. LID Transformations AFTER SW 12th Ave., Portland, Kevin Perry

  18. LID Transformations BEFORE Mount Tabor Middle School, Portland, Kevin Perry

  19. LID Transformations AFTER Mount Tabor Middle School, Portland, Kevin Perry

  20. www.centralcoastlidi.org

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