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Low Impact Development

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Ashley Timm

on 30 April 2013

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Transcript of Low Impact Development

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli Ashley Timm
Nima Khoshand
Anthony Ennis Low Impact Development Description -LID is a series of methods used to utilize stormwater as an asset by mimicking the natural water cycle

-These methods include... Brief History -Began in the 1990's by Maryland Department of Environmental Resources
-The first LID manual was made in 1998
-National manual made in 2000
-In 2002, study done by LID Center to show how LID could improve urban areas Benefits -Reuses stormwater close to source
-Improved water quality
-Recharge of groundwater
-Water filtration (bioretention, use of biosoils)
-Decreases pollution, runoff, and inorganics
-LID reduces amount of chemicals used and fertilizer needed
-Aesthetically pleasing Disadvantages -Can lead to more damage if area is already polluted
-If road sanding/salting is common, LID would create more sediment in the subsurface
-Common pavements such as asphalt can support busy roads better than the porous concrete. Here in Virginia... -2010, Friends of the Rappahannock, James River Association, & Potomac Conservancy award 0.5 million USD by Chesapeake Bay Stewardship Fund

-Partnered with universities (inc. GMU)

-Project finished an extensive evaluation of the stormwater runoff in VA's rivers and how LID can help to improve the situation Conclusion Low Impact Development:
-Uses stormwater as a resource as opposed to a potential issue
-Beneficial to the environment
-New practice that helps decrease pollution
-Controls drainage http://www.haywood.edu/UserFiles/natural_resources_management/LIDSedimentsResidential.jpg Vegetated Rooftops -Insulates building
-Absorbs rainwater
-Provides habitat
-Helps decrease urban heat http://s.ngm.com/2009/05/green-roofs/img/roofs-615.jpg http://upload.wikimedia.org/wikipedia/commons/thumb/d/de/20080708_Chicago_City_Hall_Green_Roof.JPG/200px-20080708_Chicago_City_Hall_Green_Roof.JPG Bioretention Facility -Planted near runoff sources to absorb rainwater and decrease sewer system flow http://upload.wikimedia.org/wikipedia/en/thumb/8/82/7sigma_RainGarden_66.JPG/300px-7sigma_RainGarden_66.JPG http://fuzeus.files.wordpress.com/2012/09/raingarden_section.jpeg Permeable Pavement -Reduces runoff by allowing water to go through the paving
-Captures pollutants by filtering solids from the water http://upload.wikimedia.org/wikipedia/commons/thumb/8/8f/Permeable_paver_demonstration.jpg/300px-Permeable_paver_demonstration.jpg http://www.vilksoutdoorservices.com/images/permeablepaver.jpg http://static.tumblr.com/ij83ifp/Ryrlagd5a/hobbitsm.jpg http://www.ia.nrcs.usda.gov/news/images/Pics/LIDsmall.jpg http://askhrgreen.org/wp-content/uploads/2011/06/Storm-Water-Runoff.jpg http://www.mdkidspage.org/images/baybridgepc.jpg http://progressivetimes.files.wordpress.com/2010/10/newyork_roof_gardens__original.jpg Resources http://water.epa.gov/polwaste/green/index.cfm





http://www.jamesriverassociation.org/what-we-do/va-scorecard-summary.pdf http://www.247gk.com/wp-content/uploads/2010/05/GMU-Logo.gif
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