DEFINITION
porous pavements are a paving system that allows water to infiltrate through the pavement in order to more accurately reflect the pre-development hydrologic cycle

AKA
Porous Concrete, Porous Asphalt, Porous Pavers, Open-jointed Paving blocks, Open cell paving blocks (gravel, grass etc)etc), Pervious Pavement

PERFORMANCE CRITERIA
the primary measurement for performance is the infiltrative capacity of the pavement. this can be effected over time by the build up of sediment and dirt within the pores of the pavement, but this can be remedied with regular maintenance

ILLUSTRATION

In the parking lot for Nextel at Tecnoparque in Mexico City




Two examples in Germany, open pavers andfilter strips under the car

CASE STUDIES
High Point, Seattle
Kitsap Homebuilders LID Demonstration Project, Bremerton
Williamsburg Prime Outlets, Hampton Roads, Virginia
Arkadien Asperg Housing Development, Stuttgart, Germany

ADDITIONAL RESOURCES
Porous Pavement Powerpoint (as PDF) for Seattle's Stormwater Seminar Series
case study of an eastern North Carolina permeable pavement: http://www.box.net/shared/al1h2z7tod
Toronto Guidelines for Greening Parking Lots
City of Seattle Guide for Green Parking Lots
Portland Cement Pervious Concrete Pavement: Field Performance Investigation on Parking Lot and Roadway Pavements
Curtis Hinman of WSU's survey of porous pavement performance research
Mutual Materials' Eco-Stone Performance Study