Low Impact Development (LID)

Low Impact Development is a rapidly growing field of research and pollution reduction strategies. The premise of LID is to deploy structural Best Management Practices (BMPs) that reduce pollution effects to the environment. LID mostly addresses water quality problems in urban areas. Low Impact Development concepts are gaining interest among municipal stormwater permittees as a practical means to control urban nonpoint sources of pollution closer to the source

LID projects typically involve structural mechanisms to absorb or capture rainwater, often with a pollutant reduction treatment system or device. Examples include downspout rain barrels from roof drains, roof gardens, porous pavement in parking lots and walkways, and rain gardens that allow rain water to flow into a designed area having soil, plants and sometimes absorbents that remove pollutants.

Until recently, the effectiveness of LID structures and practices was assumed. However, Universities and many agencies have conducted enough research now to determine pollutant removal efficiencies and cost-benefit estimates. These new data are available from many sources. However, in Oklahoma, as in many States, there is no central consolidation of LID information and resources.

This web page is the beginning of what will become a comprehensive web-based resource center for LID information in Oklahoma. INCOG will complete a grant-supported project to develop LID resources, create education materials, help showcase LID projects in Oklahoma, and host workshops on LID and urban water quality. The resources to be compiled will focus on types of materials, designs and structures that are available in Oklahoma, and to provide contact information for contractors, design consultants and agencies that are skilled in LID utilization.

Links to LID Web Sites

EPA's Low Impact Development and Other Green Design Strategies - This website provides basic urban stormwater protection options and has numerous links to LID-related resources.

EPA's Green Infrastructure - This website is dedicated to a new EPA program to encourage and provide assistance on many types of urban water quality protection efforts. Green infrastructure represents a new approach to stormwater management that is cost-effective, sustainable, and environmentally friendly. Green infrastructure techniques utilize natural systems, or engineered systems that mimic natural landscapes, to capture, cleanse and reduce stormwater runoff using plants, soils and microbes.

ASCE Low Impact Development Committee Initiatives - This website is sponsored by the American Society of Professional Engineers (ASCE) Environmental and Water Resources Institute (EWRI). The Low Impact Development (LID) committee of the Urban Water Resources Research Council (UWRRC) recently began several initiatives, including green roof technology, porous and permeable pavement, and rainwater harvesting technology, which are summarized here.

Green Values Stormwater Toolbox - This website, sponsored by the Center for Neighborhood Technology, offers a detailed calculator for hydrologic and financial efficiencies of the various land use practices selected.

Urban Land Institute - As the preeminent, multidisciplinary real estate forum, ULI facilitates the open exchange of ideas, information and experience among local, national and international industry leaders and policy makers dedicated to creating better places.

Low Impact Development Center - The LID Center is a non-profit organization dedicated to the advancement of Low Impact Development technology utilizing a comprehensive land planning and engineering design approach with the goal of maintaining and enhancing the predevelopment hydrologic regime of urban and developing watersheds.

EPA Low Impact Development - This is the main website from EPA regarding Low Impact Development. From here, additional links are provided to other EPA websites and to many non-EPA websites dealing with LID resources, information and case studies.