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http://dx.doi.org/10.12652/Ksce.2022.42.3.0333

Application of LID to Reduce Storm Runoff according to the RCP Climate Change Scenarios  

Kim, Min ji (Hanyang University)
Kim, Ji Eun (Hanyang University)
Park, Kyung Woon (Hanyang University)
Kim, Tae-Woong (Hanyang University (ERICA))
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.3, 2022 , pp. 333-342 More about this Journal
Abstract
Due to climate change, increased heavy rainfalls result in flood damage every year. To investigate the storm-runoff reduction effects of Low Impact Development (LID), this study performed runoff analyses using the U.S. Environmental Protection Agency (EPA) Storm Water Management Model (SWMM) for past and future representative storm events of the Yongdu Rainwater Pumping Station basin. As a result, the infiltration loss for representative future rainfalls increased by 3.17 %, and the surface runoff and peak runoff rate increased significantly by 32.50 %, and 128.77 %, respectively. To reduce the increased surface runoff and peak runoff rates, this study investigated the applicability of LID approaches, including a permeable pavement, green roof, and rain garden, by adjusting the LID parameters and the ratio of installation area. We identified the ranges of LID parameters that decreased peak runoff rate and surface runoff, and increased infiltration. In addition, when the application ratio of permeable pavement, green roof, and rain garden was 2:1:3, best performance was attained, leading to a reduction of peak runoff of 26.85 %, infiltration loss 12.01 %, surface runoff 15.11 %, and storage 509.47 %. Based on analyzing the effect of storm runoff reductions for various return periods, it was found that as the return period increased, the proportion of peak runoff and surface runoff increased and the proportion of infiltration loss and storage decreased.
Keywords
Climate change; SWMM (Storm Water Management Model); LID (Low Impact Development); Storm-runoff reduction;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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