low impact development - nacd...distributed decentralized micro- scale controls. lid's goal is...
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LOW IMPACT DEVELOPMENT IN NORTHERN VIRGINIA
NACD Urban & Community Conservation Webinar June 19, 2014
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What is Low Impact Development?
manage rainfall at the source using uniformly distributed decentralized micro-scale controls. LID's goal is to mimic a site's predevelopment hydrology by using design techniques that infiltrate, filter, store, evaporate, and detain runoff close to its source.
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LID Principles
Increase Infiltration
Minimize Disturbance
Reduce Runoff
Filter, Absorb Pollutants
Retain Natural Drainage
Minimize Imperviousness
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Our vision: An informed community working together to protect natural resources.
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Working as a Team
Conservation Specialist Urban Conservation Engineer
Watershed Specialist Environmental Educator
Soil Scientist Admin and Technical Assistant
Financial Assistant Executive Director
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Education & Engagement • Watershed
Science • Stream
Monitoring • Storm Drain
Marking • Watershed
Friendly Garden Tours
Technical Assistance • Soil
Characteristics • Drainage • Erosion • Plan Review • Stormwater
Permit Support
Urban Conservation • Stream
Restoration • Rain Gardens • Rain Barrels • Composters • Conservation
Landscaping • Ag Cost-Share
Collaboration & Partnering • Local, State, &
Federal Govt • Industry • Nonprofits • Community
Leaders • Watershed
Roundtables
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0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
Population Households
Growth in Fairfax County
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Watershed Community Individual Lots
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LID Principles
Increase Infiltration
Minimize Disturbance
Reduce Runoff
Filter, Absorb Pollutants
Retain Natural Drainage
Minimize Imperviousness
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Roles of NVSWCD
Learn • Communicate with peers • Visit sites & attend conferences
Pilot • Design & install practices
Monitor • Assess performance
Share • Provide trainings • Feature sites in annual tours & events • Engage in policy discussions
Support • Provide technical review / assistance • Provide resources (BYO-rain barrels)
Research • Monitor emerging trends, concerns and
techniques • Perform intensive assessments
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Physical Assessment of Selected Rain Gardens in Fairfax County (2007)
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Maintenance
Challenge Opportunity!
Not enough trained landscaping companies Establish a regular training / certification program.
Many HOAs haven’t budgeted for maintenance needs…
Provide HOAs with a general maintenance cycle and associated costs. Create a support fund for HOAs, if acceptable.
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In 2012, we had: 1.1 Million Residents 400,000 Households
In 2025, we anticipate: 1.2 Million Residents 450,000 Households
Between 2011 and 2012, roughly 8% of the population were new to the area.
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Constantly Learning & Sharing
Coast Guard HQ, Washington, D.C. 3rd Largest Green Roof in the World
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To Google…
Northern Virginia SWCD Resources Rain Garden Guidebook Residential Low Impact Landscaping Handbook Solving Drainage & Erosion Online Guidebook Rain Barrel Partnership
Low Impact Development Center Inspiration, Landscaping
Chesapeake Stormwater Network
Design Standards, Inspection, Maintenance, Credits
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Thank you!
Laura Grape
District Manager Northern Virginia SWCD
703-324-1425 www.fairfaxcounty.gov/nvswcd