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Pervious Pavement System Evaluation-Poster
Citation:
Rowe, A. A., M. BORST, AND T. O'CONNOR. Pervious Pavement System Evaluation-Poster. Presented at Raingarden/Bioretention Research and Extension Symposium, New Brunswick, NJ, May 29 - 30, 2008.
Impact/Purpose:
Poster Presentation
Description:
Pervious pavement is a low impact development stormwater control. The Environmental Protection Agency's Urban Watershed Management Branch is evaluating interlocking concrete pavingstone pervious pavement systems. The pavingstones themselves are impermeable, but the spaces between the pavers are backfilled with washed, graded stone that allows water to infiltrate and also acts as structural support for the pavers. Stormwater moves through several bedding layers after passing the pavingstones. The performance of a permeable interlocking concrete paver system was evaluated with urban stormwater runoff from a 93/4-acre drainage area. Stormwater was delivered to the pavement system twice daily to accelerate aging of the system, while flow rate, clogging, and long-term pollutant removal were monitored. Configurations with and without filter fabric between the gravel layers were investigated. The systems with the fabric removed total suspended solids more efficiently than those without. Also, average peak effluent flow rates were reduced by 75% with the filter fabric in the system.