Citation:

OConnor, T. AND M. Borst. Predicting Location and Evaluating Progression of Clogging in a Permeable Pavement Parking Lot. Journal of Green Building. College Publishing, Glen Allen, VA, 17(4):3-18, (2022). https://doi.org/10.3992/jgb.17.4.3

Impact/Purpose:

This paper describes infiltration testing of permeable interlocking concrete pavers at the Edison Environmental Center. Reductions in infiltration testing rates implies that maintenance is necessary,. This paper also highlights the results of a high resolution survey to predict where infiltration rates would be most impacted. the results of this study show that the clogging of the pavers occurs from the upgradient edge. Results of the paper may help others pinpoint maintenance effort in keeping permeable pavements functional as a stormwater control.

Description:

The EPA’s Office of Research and Development constructed a permeable pavement demonstration site at the Edison Environmental Center, NJ in 2009. Infiltration testing of three original permeable parking rows from December 2009 through August 2012 indicated that clogging occurred from the upgradient edge of the permeable pavements adjacent to the impermeable asphalt driving lanes that drained toward the permeable surfaces. This paper focusses on a subsequent infiltration testing data collection effort from April 2017 through March 2020 on permeable interlocking concrete pavers (PICP) laid in 2016 to replace one of the original permeable surfaces. While the original infiltration data collection effort in 2009 through 2012 was performed by choosing random locations throughout the permeable parking rows, this study targeted the upgradient edge to identify where clogging occurred. Testing locations along the upgradient edge were selected based on results of a high-resolution survey of the parking lot performed in December 2014. This paper shows that three locations that eventually clogged in the new PICP were predicted by a high-resolution survey. A comparison of the newer PICP is also made to the PICP originally installed in 2009. Due to the nature of the newer infiltration study, which was not random, linear regressions for the newer pavers had a higher coefficient of determination for decreasing infiltration rates over time than the regression for the originally installed PICP. The newer study also supports the conclusion of the earlier study with regards to truncating the infiltration testing method to only require the initial, prewetting test rather than the prewetting test followed by the standard infiltration test, particularly for maintenance assessments.

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