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Normalization of Pervious Paver Infiltration Testing Parameters

Internally funded Masters Student: Ryan Fagan

With the current efforts to mitigate storm-water runoff prior to entering combined or separated sewer systems through green infrastructure (GI) controls it is important to quantify their performance over time. In the case of permeable pavement installations, performance is measured through surface infiltration testing. Current protocol for measuring surface infiltration follows ASTM C1701/C1701M for Infiltration Rate of in-place Pervious Concrete. The current protocol is viable for in-place pervious concrete, but does not account for variability in permeable pavement patterns nor infiltration gap sizes. Utilization of pervious pavers to divert storm water runoff to ground water is utilized not only to diminish the demand on municipal water purification facilities, saving potentially hundreds of thousands in tax payers’ dollars, but also to minimize the environmental impact of storm water runoff.

Testing of these various pervious paver systems is imperative to determine the efficacy of the paver systems both before and after maintenance due to clogging. To improve on the current protocol, this study examines various pipe sizes along with variability in placement and paver patterns to help normalize testing parameters. This study concludes that employing a larger diameter pipe would be advantageous in testing infiltration of various pervious paver systems, because it limits the impacts of gap sizes and paver pattern variability on measured surface infiltration rates.




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