New perspectives on urban stormwater management in China, with a focus on extreme rainfall events

Pengjun Li, Luwen Zhuang, Kairong Lin, Dunxian She, Qiuling Chen, Qiang Wang and Jun Xia ()
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Pengjun Li: Wuhan University
Luwen Zhuang: Sun Yat-Sen University
Kairong Lin: Sun Yat-Sen University
Dunxian She: Wuhan University
Qiuling Chen: Pearl River Water Resources Research Institute
Qiang Wang: Sun Yat-Sen University
Jun Xia: Wuhan University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2025, vol. 121, issue 4, No 2, 3745-3774

Abstract: Abstract Climate change, especially the rise in extreme rainfall events, combined with urbanization, poses significant challenges to traditional hydrological methodologies. These developments call for researchers to reassess conventional analytical and numerical approaches and make the necessary adjustments to address these evolving conditions. In this study, we begin by analyzing the patterns and mechanisms of the extreme rainfall event in Zhengzhou on July 20, 2021 (“7.20” extreme rainfall in Zhengzhou). Building on this analysis, we offer insights and propose solutions to key issues in urban stormwater management. A bibliometric analysis of the Zhengzhou event indicates that urban flooding is primarily driven by climate change, with urbanization being a secondary factor. Additionally, the integration of machine learning with traditional numerical hydrological models, such as the widely used SWMM model, has emerged as a research trend to enhance the accuracy and comprehensiveness of parameter estimation. New urban stormwater management techniques and strategies are essential for improving urban flooding resilience, including a three-level collaborative governance system, urban green-gray-blue facilities, smart integrated management, and digital twin technologies. Furthermore, fully coupled water management models and strategies that incorporate all elements of hydrological cycles are essential for addressing complex urban hydrological challenges.

Keywords: Resilient City; Smart integrated management; Urban extreme rainfall; Urban stormwater management; “7.20” extreme rainfall in Zhengzhou (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s11069-024-06994-3

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