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Toward Sustainable, Resilient Stormwater Management in Southeast Florida - Green Infrastructure Design & Place-Making
January 22, 2015
Toward Sustainable, Resilient Stormwater Management in Southeast Florida - Green Infrastructure Design & Place-Making
January 22, 2015
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Low-Impact Development and Green Infrastructure - EPA Low-impact development is an approach to
land development (or re-development) that works with nature to manage stormwater as close to its source as possible. LID employs principles such as preserving and recreating natural landscape features, minimizing effective imperviousness to create functional and appealing site drainage that treat stormwater as a resource rather than a waste product.
Green infrastructure refers to systems and practices that use or mimic natural processes to infiltrate, evapotranspirate, or reuse stormwater or runoff on the site where it is generated.
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Old Style Development and Regulation
Clear
Fill
Compact
Make impervious
Treat/attenuate centrally
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Low-Impact Development/Green Infrastructure Approach
Maintain vegetation
Minimize fill, compaction, and imperviousness
Use vegetation and soils
Promote infiltration
Distribute treatment
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Low-Impact Development/Green Infrastructure Examples
• Conservation areas• Narrower streets
Site design
Bioretention, boiswales, biofiltration
Greenroof treatment systems
Pervious pavement
Stormwater reuse
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Historical Hurdles for LID/GI Practices
SFWMD/FDEP Environmental Resource Permit
Basin Management Action Plan
• BMPs outside of easements
• Difficulty in determining if functioning as designed
• Magnitude makes inspection/enforcement impractical
Reasonable assurance
Lack of monitoring/ performance data
• May not be directly recognized in ERP process
Lack of local design criteria
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Helping with Regulatory Acceptance
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Source: Evaluation of CurrentStormwater DesignCriteria within theState of Florida (Harper and Baker, 2007)
Inadequacy of Conventional BMPs
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Town of Melbourne Beach Challenges
Facing large TMDL goal
Lack of real estate for improvements
Expensive cost of property acquisition
Regional projects difficult
Crowned median, grassed edging
Impervious areas directly connected
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Sunset Blvd Project Elements
1,000 LF median bioretention swale
Use of curb and flumes to protect median
Pervious pavers at median ends
Native plants used, especially on west end with higher groundwater table
Areas in front of lots graded for rain garden at resident’s request
Normal Flow.
Overflow during extreme events.
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West End
Pre and Post Construction
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East End
Pre and Post Construction
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Sunset Blvd Performance
Town received approximately 8 inches of rainfall October 7 - 9, 2011
Visual monitoring performed
No runoff observed
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