Transcription of VIRGINIA DCR STORMWATER DESIGN SPECIFICATION No. 9 …
{{id}} {{{paragraph}}}
Example: barber
VIRGINIA DCR STORMWATER DESIGN SPECIFICATION No. 9 …
VA DCR STORMWATER DESIGN SPECIFICATION NO. 9 BIORETENTION Version , January 1, 2013 Page 1 of 62 VIRGINIA DCR STORMWATER DESIGN SPECIFICATION No. 9 BIORETENTION VERSION January 1, 2013 SECTION 1: DESCRIPTION Individual bioretention areas can serve highly impervious drainage areas less than two (2) acres in size. Surface runoff is directed into a shallow landscaped depression that incorporates many of the pollutant removal mechanisms that operate in forested ecosystems. The primary component of a bioretention practice is the filter bed, which has a mixture of sand, soil, and organic material as the filtering media with a surface mulch layer.
These are small, distributed practices designed to treat runoff from small areas, such as individual rooftops, driveways and other on -lot features in single - family detatched residential developments. Inflow is typically sheet flow, or can be concentrated flow with energy dissipation, when located at downspouts.
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: