1 / 19

LID Case Study: The Madera Subdivision

M a r i o n C o u n t y L I D P r o g r a m. LID Case Study: The Madera Subdivision. Glenn Acomb, ASLA Department of Landscape Architecture Program for Resource Efficient Communities University of Florida. April 5, 2007.

cosima
Télécharger la présentation

LID Case Study: The Madera Subdivision

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. M a r i o n C o u n t y L I D P r o g r a m LID Case Study: The Madera Subdivision Glenn Acomb, ASLA Department of Landscape Architecture Program for Resource Efficient Communities University of Florida April 5, 2007

  2. M a r i o n C o u n t y L I D P r o g r a m LID Design Considerations Limit site disturbances; small footprint Mimic hydrologic function Limit impervious surfaces Utilize bioremediation Use native plants Limit use of irrigation and processed water Limit use of fertilizers and pesticides

  3. M a r i o n C o u n t y L I D P r o g r a m Case Study: Madera A Model Subdivision of LID Design Techniques

  4. M a r i o n C o u n t y L I D P r o g r a m Case Study: Madera Location: Gainesville, Florida Size: 44 acres Developer: GreenTrust, LLC (MD) in partnership with the University of Florida Energy Extension Office 88 single-family homes on 44 acres (2.0 units/acre) Uses LID practices for resource efficiency Significant community open space and buffers Uncurbed roads and narrow right-of-way (50’) Restrictions to protect hardwood tree canopy and understory vegetation Proximity to UF and trail connections All homes are EnergyStar, WaterStar & resource efficient

  5. M a r i o n C o u n t y L I D P r o g r a m Sustainable Design Techniques for the Community • First to be approved via the City’s Green Development Code • Reasonably compact houses (2,200-2,600 s.f.) • Limited clearing of lots; must submit site plan with tree locations • Native plants and very limited turf • Connectivity to University (1.5 mile; trail connection) • Goal of zero discharge of stormwater on lots • Minimally-sized community detention basin • Required use of EnergyStar and WaterStar appliances + • Porches encouraged; front-loaded garages discouraged

  6. M a r i o n C o u n t y L I D P r o g r a m Design Techniques for the Community Narrow, uncurbed roads Use of Eco-Block in construction Stormwater detention basin, Phase I Limited clearing & contractor care

  7. M a r i o n C o u n t y L I D P r o g r a m Sustainable Design Techniques for the Lot:Design Techniques of the Model • Limited clearing of site • Limited turf (35% of conventional) • Limited irrigation (50%); low-volume design • Limited impervious cover (encouraged) - Pervious pavers for driveway & sidewalk and shared driveway for some lots • Zero discharge of stormwater – Capture of 1/3 roof stormwater to an infiltration tank; water garden in front yard natural area • Use of natives and “Florida Friendly” plants; SJRWMD & Florida Yards & Neighborhood support • Retained snags in rear yard buffer • Model home displays an array of green products

  8. M a r i o n C o u n t y L I D P r o g r a m Madera Model Center Landscape Design Existing Vegetation Existing Vegetation Entry Rain Garden Model Center Garage Road Tank Guest Parking Guest Parking Existing Vegetation Shared Driveway (pervious pavement)

  9. M a r i o n C o u n t y L I D P r o g r a m Madera Model Center Permeable pavers Shared driveway and pavers Model front yard Native plant information

  10. M a r i o n C o u n t y L I D P r o g r a m Madera Site Details Turf reinforcing in spare parking areas Eco-Stone pervious pavers in driveway Roof stormwater infiltration tank under spare parking

  11. M a r i o n C o u n t y L I D P r o g r a m Madera Model Center Rain Garden Front yard and Shumard Oak Model side yard Water conservation information

  12. M a r i o n C o u n t y L I D P r o g r a m Madera Home 2003 No turf, front-loading garage; edge ornamental plantings

  13. M a r i o n C o u n t y L I D P r o g r a m Madera Home 2004 First 2-story; side-loading garage; no turf

  14. M a r i o n C o u n t y L I D P r o g r a m Madera Home 2005 Front-loading garage; very limited turf; extensive mulch; rain garden

  15. M a r i o n C o u n t y L I D P r o g r a m Comparison with Conventional:Site Design Techniques for the Lot Capital Costs: (2003/2004 dollars) Task Sustainable Conventional Sustainable Savings Clearing/Grading $1,612.00 $2,016.00 $400.00 Utility Connection same same --0-- Natural Area Mulch $245.00 $90.00 ($155.00) Landscape Area Mulch $665.00 $406.00 ($259.00) Landscaping $6,485.00 $6,485.00 --0-- Turf $720.00 $2,331.00 $1,611.00 Irrigation $1,275.00 $1,500.00 $225.00 Driveway* $6,084.00 $7,584.00 varies with material Infiltration Tank $1,032.00 --0-- ($1,032.00) Turf Reinforcing for Parking $845.00 --0-- ($845.00) SUB TOTAL $18,963.00 $20,412.00 * * Note: The driveway, if not shared, would cause an advantage of $5,294 in favor of the Conventional. If so, only in the maintenance per annum can the costs be recovered (in less than 3 years). Also, there should also be an adjustment of capital cost of the project-wide stormwater savings of reduced pond size due to the zero discharge at the lot (approx. $1,000 saved per lot).

  16. M a r i o n C o u n t y L I D P r o g r a m Comparison with Conventional:Site Design Techniques for the Lot Maintenance Costs: (annual costs, 2003/2004 dollars) Task Sustainable Conventional Sustainable Savings Landscape service (incl. mowing) $1,470.00 $3,150.00 $1,680.00 Pesticide applications by service $200.00 (IPM) $300.00 $100.00 Irrigation $71.84 $167.51 $115.67 [31,602 gal.] [74,120 gal.] SUB TOTAL $1,721.84 $3,617.51$1,895.67 Result: The approach to the maintenance considers 42 landscape maintenance visits to the residential site and 5 visits for application of pesticide. Also there would be increased maintenance of the project-wide stormwater pond due to the greater depth of pond and greater accumulation of silt, debris and noxious plants in the bottom.

  17. M a r i o n C o u n t y L I D P r o g r a m Comparable used in figures Comparable price point; subdivision across from project; comparable site characteristics

  18. M a r i o n C o u n t y L I D P r o g r a m Email Contact Web Sites Program for Resource Efficient Communities: www.energy.ufl.edu UF Department of Landscape Architecture: www.dcp.ufl.edu/landscape acomb@ufl.edu

  19. M a r i o n C o u n t y L I D P r o g r a m Bibliography Arendt, Randall. Conservation Design for Subdivisions. Island Press, 1996. EPA. Our Built and Natural Environments: A Technical Review of the Interactions between Land Use, Transportation and Environmental Quality. 2001. Florida Green Building Coalition. “Green Development Design Standards.” FGBC, 2003. NAHB Research Center. The Practice of Low Impact Development. Prepared for the U.S. Department of Housing & Urban Development, 2003 Rocky Mountain Institute. Green Development. John Wiley & Sons, 1998. Sustainable Industries Building Council. “Green Design Guidelines,” SIBC, 2004. Thompson, William and Sorvig, Kim. Sustainable Landscape Construction. Island Press, 2000.

More Related