Chiu Yu-Jia, Chang Lo-Chen, Lin Yu-Te, Lin Ying-Tien, Liu Chen-Wuing, Lee Jin-Jing
Department of Harbor and River Engineering, National Taiwan Ocean University, No.2, Beining Rd., Zhongzheng Dist, Keelung City, 202301, Taiwan R.O.C..
Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung , 202301, Taiwan.
Sci Rep. 2025 Jul 26;15(1):27251. doi: 10.1038/s41598-025-11586-7.
Traditional urban stormwater management systems are increasingly strained by expanding impervious ground cover and intense precipitation associated with climate change. Low-impact Development (LID) has emerged as a vital strategy to mitigate these impacts. This study assessed Taiwan's first large-scale integrated LID installation-the Taoyuan Water Recycling Center, which incorporates bioretention cells, permeable pavements, and green roofs. Simulations performed using the Storm Water Management Model (SWMM) calibrated using field data collected in 2021-2024 demonstrated that these LID facilities reduced runoff volume by as much as 88%, with peak flow reductions reaching 90%. Under short-duration rainfall conditions, LID also reduced the risk of urban flooding by delaying the onset of peak flows. Analysis of six sub-catchments subjected to 24 synthetic storm scenarios revealed facility layout, storage capacity, and contributing drainage area as the principal determinants of LID performance. These findings underscore the need to scale up LID infrastructure-by increasing storage depth as well as spatial coverage-when seeking to enhance the resilience of urban centers to extreme rainfall.
传统的城市雨水管理系统因不透水地面覆盖面积的扩大以及与气候变化相关的强降水而日益不堪重负。低影响开发（LID）已成为减轻这些影响的一项重要策略。本研究评估了台湾首个大规模综合LID设施——桃园水回收中心，该中心包含生物滞留池、透水路面和绿色屋顶。使用2021年至2024年收集的现场数据校准的雨水管理模型（SWMM）进行的模拟表明，这些LID设施将径流量减少了多达88%，峰值流量减少了90%。在短历时降雨条件下，LID还通过延迟峰值流量的出现降低了城市内涝风险。对六个子汇水区进行的24种合成暴雨情景分析表明，设施布局、存储容量和汇水面积是LID性能的主要决定因素。这些发现强调，在寻求增强城市中心对极端降雨的复原力时，需要扩大LID基础设施规模——增加存储深度以及空间覆盖范围。
