Virginia Runoff Reduction Method technical memo, spreadsheets and technical background memo: The Virginia Runoff Reduction Method was developed by the Center for Watershed Protection (CWP), the Chesapeake Stormwater Network (CSN), and the Virginia Department of Conservation and Recreation. The method represents an innovative system for stormwater design and involves the use of two spreadsheets, one for new development and one from redevelopment, in accordance with the Virginia Runoff Reduction Method instructions and documentation. Additionally, a technical memo, which is reflective of earlier versions of the method, provides historical background research on BMP performance.
The method focuses on determining BMPs' capacity to reduce the overall volume of runoff as well as pollutant removal. The BMPs include conventional and innovative practices (e.g., permeable pavement, sheet flow to filter areas or open space, vegetated roofs, downspout disconnection, etc.). The method also incorporates built-in incentives for environmental site design, such as forest preservation and the reduction of soil disturbance and impervious surfaces. This method was tested in numerous site-plan workshops held across Virginia by DCR and the Virginia Chapter of the American Society of Civil Engineers and has been refined in response to comments received.
Virginia Runoff Reduction Method
Historical Background Memo