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Article

Control of Runoff Peak Flow for Urban Flooding Mitigation

by 1,2, 3, 1 and 1,2,3,*
1
Guangxi Hualan Geotechincal Engineering Limited Company (Group Co., Ltd.), 38 Wangzhou Road Beierli, Xixiangtang District, Nanning 530001, China
2
School of Civil Engineering and Architecture, Guangxi University for Nationalities, 188 University Road, Nanning 530006, China
3
College of Civil Engineering and Architecture, Guangxi University, 100 University Road, Nanning 530004, China
*
Author to whom correspondence should be addressed.
Academic Editors: Ibrahim Demir, Marian Muste and Haowen Xu
Water 2021, 13(13), 1796; https://doi.org/10.3390/w13131796
Received: 13 May 2021 / Revised: 21 June 2021 / Accepted: 23 June 2021 / Published: 29 June 2021
(This article belongs to the Special Issue Frontiers in Urban Water Infrastructure)
Urban flooding has become a serious but not well-resolved problem during the last decades. Traditional mainstream facilities, such as vegetated roofs, permeable pavements, and others, are effective to eliminate urban flooding only in case of small rains because the water-retaining and detaining capacities of these traditional facilities are limited. Here, we propose a new buffer tank buried in soil to deal with rainwater onsite as peak-flow control for urban flooding mitigation. Experiments showed that the buffer tank intercepts the surface runoff and discharges the intercepted water through a designed outlet orifice. By properly setting the cross-sectional area of the orifice, the tank extends the drainage duration several times longer than that of the rainfall duration. It is found that the buffer tank attenuates the peak flow greater at heavier rain. At small rain (<2.5 mm), the tank is always unfilled, preserving storage spaces for detaining rainwater in case of heavy rain. The buffer tank is thus greatly helpful to mitigate the flooding problem, avoiding being saturated by small long-lasting rain. View Full-Text
Keywords: urban flooding; peak flow; rainfall; buffer tank; runoff; trading time for space urban flooding; peak flow; rainfall; buffer tank; runoff; trading time for space
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MDPI and ACS Style

Lu, Y.; Xie, J.; Yang, C.; Qin, Y. Control of Runoff Peak Flow for Urban Flooding Mitigation. Water 2021, 13, 1796. https://doi.org/10.3390/w13131796

AMA Style

Lu Y, Xie J, Yang C, Qin Y. Control of Runoff Peak Flow for Urban Flooding Mitigation. Water. 2021; 13(13):1796. https://doi.org/10.3390/w13131796

Chicago/Turabian Style

Lu, Yunan, Jinli Xie, Cheng Yang, and Yinghong Qin. 2021. "Control of Runoff Peak Flow for Urban Flooding Mitigation" Water 13, no. 13: 1796. https://doi.org/10.3390/w13131796

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