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Water 2018, 10(2), 172; doi:10.3390/w10020172

Flood Mitigation by Permeable Pavements in Chinese Sponge City Construction

1
Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto 611-0011, Japan
2
School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
3
School of Earth & Environment, University of Leeds, Leeds LS2 9JT, UK
4
Graduate School of Engineering, Kyoto University, Kyoto 615-8530, Japan
5
Department of Geography and Environmental Science, University of Reading, Reading RG6 6AB, UK
6
Chongqing Engineering Research Center for Remote Sensing Big Data Application, Chongqing Key Laboratory of Karst Environment, School of Geographical Sciences, Southwest University, Chongqing 400715, China
*
Authors to whom correspondence should be addressed.
Received: 29 November 2017 / Revised: 4 February 2018 / Accepted: 6 February 2018 / Published: 9 February 2018
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Abstract

It is important to evaluate the effectiveness of permeable pavements on flood mitigation at different spatial scales for their effective application, for example, sponge city construction in China. This study evaluated the effectiveness of three types of permeable pavements (i.e., permeable asphalts (PA), permeable concretes (PC), and permeable interlocking concrete pavers (PICP)) on flood mitigation at a community scale in China using a hydrological model. In addition, the effects of clogging and initial water content in permeable pavements on flood mitigation performance were assessed. The results indicated that in 12 scenarios, permeable pavements reduced total surface runoff by 1–40% and peak flow by 7–43%, respectively. The hydrological performance of permeable pavements was limited by clogging and initial water content. Clogging resulted in the effectiveness on total surface runoff reduction and peak flow reduction being decreased by 62–92% and 37–65%, respectively. By increasing initial water content at the beginning of the simulation, the effectiveness of total runoff reduction and peak flow reduction decreased by 57–85% and 37–67%, respectively. Overall, among the three types of permeable pavements, PC without clogging had the best performance in terms of flood mitigation, and PICP was the least prone to being clogged. Our findings demonstrate that both the type and the maintenance of permeable pavements have significant effects on their performance in the flood mitigation. View Full-Text
Keywords: flood mitigation; surface runoff; peak flow; initial water content; clogging flood mitigation; surface runoff; peak flow; initial water content; clogging
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Hu, M.; Zhang, X.; Siu, Y.L.; Li, Y.; Tanaka, K.; Yang, H.; Xu, Y. Flood Mitigation by Permeable Pavements in Chinese Sponge City Construction. Water 2018, 10, 172.

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