Permeable pavement

This photo illustrates an example of pervious concrete.

Permeable pavements allow stormwater runoff to filter through surface voids into an underlying stone reservoir where it is temporarily stored and/or infiltrated. The most commonly used permeable pavement surfaces are pervious concrete, porous asphalt and permeable interlocking pavers. Permeable pavements have been used for commercial and residential sites to replace traditionally impervious surfaces. These include roads, parking lots, driveways, sidewalks, plazas and patios. While the designs vary, all permeable pavements have a similar structure, consisting of a surface pavement layer, an underlying stone aggregate reservoir layer, optional underdrains and geotextile over uncompacted soil subgrade.

The reservoir thickness is determined by structural and hydrologic design analyses. From a hydrologic perspective, permeable pavement is typically designed to manage rainfall landing on the pavement surface area. It may accept runoff contributed by adjacent impervious areas such as driving lanes or rooftops. However, sediment control from adjacent impervious or vegetated contributing areas is required to avoid clogging of the permeable pavement surface.

Caution: Sediment control from adjacent impervious or vegetated contributing areas is required to avoid clogging of the permeable pavement surface

This photo illustrates an example of porous asphalt

This photo illustrates an example of permeable interlocking pavement

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Overview for permeable pavement

Types of permeable pavement

Design criteria for permeable pavement

Construction specifications for permeable pavement

Construction observations for permeable pavement

Assessing the performance of permeable pavement

Operation and maintenance of permeable pavement

Calculating credits for permeable pavement

Cost-benefit considerations for permeable pavement

Additional considerations for permeable pavement

Links for permeable pavement

References for permeable pavement

#Permeable pavement credits

A one page fact sheet for permeable pavement provides overview information, a short summary of design, construction and maintenance considerations, and information on stormwater volume and pollutant removal.

The individual articles comprising this section on permeable pavement may be viewed as a single article.