California Department of Transportation
 

LID Permeable Paving

 

Permeable Paving
Permeable Concrete Paver Schematic Detail.  Source: Interlocking Concrete Pavement Institute

Permeable paving
Detail.  Source: Concrete Services NWA.com                                       Photo Source: California Stormwater Quality Assoc.


Permeable Paving:

An effective way to control stormwater runoff is to use permeable paved surfaces such as pervious concrete, pervious asphalt or pervious pavers and is best suited for parking lots, walkways and other areas that don’t have heavy vehicular traffic.  Permeable paving allows stormwater to infiltrate through the surface to an underlying crushed rock base where it is either stored or infiltrated.  The infiltration rate of permeable paving often exceeds the precipitation rate of high-intensity storms.  The Office of Stormwater Management is currently developing guidance and specifications for the use of pervious concrete pavement. Landscape Architects must work closely with their Project Development Team to identify opportunities to include permeable paving.

When selecting permeable paving, Landscape Architects are encouraged to work with the Project development Team to determine the underlying soil condition and depth of base course material required for adequate storage capacity.  Other design considerations include groundwater table elevation, installation costs, and maintenance.  Vacuum sweeping may be required if excessive sediment loads might cause clogging.

Below are links to design guidance and construction details for permeable paving.

California Stormwater Quality Association, LID Parking Lots- https://www.casqa.org/LIDDemo/LIDToolBox/IntegratingLIDintoSiteDesign/tabid/247/Default.aspx

New Jersey Stormwater Best Management Practices Manual, Standard for Pervious Paving Systems- http://www.njstormwater.org/bmp_manual/NJ_SWBMP_9.7.pdf

EPA- Stormwater Menu of BMPs, Green Parking- http://cfpub.epa.gov/npdes/stormwater/menuofbmps/index.cfm?action=factsheet_results&view=specific&bmp=89

Interlocking Concrete Pavement Institute, Permeable Pavers- http://www.icpi.org/node/553