The influence of rainfall intensity and duration on sediment pathways and subsequent clogging in permeable pavements.

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ID: 261356
2019
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Abstract
The trapping of sediments within permeable pavements during infiltration is an important process that contributes to their water quality treatment performance. However, this process also leads to clogging, which decreases the infiltration capacity of the pavement. With different rainfall intensities and durations, this study investigates the amount and size of sediment passing through a porous paver, as well as through the gravel-filled gaps that separate adjacent pavers. One of the major challenges in this study was to design an experiment where the characteristics of the sediment particles that are trapped while passing through these two different infiltration pathways are assessed. This was overcome by developing a new type of rainfall application device in combination with a two-tiered sediment capturing system. A better understanding of the infiltration pathways of sediment and the associated clogging processes should help designers improve the effective life of permeable pavements. Overall, it was found that while the porosity of porous pavers serves a useful function in terms of removing excess surface water during and after a rainfall event, it serves little purpose in removing sediment from stormwater.
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Authors Yang, Qiuxia;Beecham, Simon;Liu, Jixue;Pezzaniti, David;
Journal Journal of environmental management
Year 2019
DOI
S0301-4797(19)30779-0
URL
Keywords
permeable pavement rainfall intensity clogging infiltration pathway porous paver rainfall duration

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