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Emergency Response to Urban Flooding: An Assessment of Mitigation Performance and Cost-Effectiveness in Sponge City Construction

Author

Listed:
  • Zhiwen Zheng

    (Water Conservancy College, North china University of Water Resources and Electric Power)

  • Xianqi Zhang

    (Water Conservancy College, North china University of Water Resources and Electric Power
    Collaborative Innovation Center of Water Resources Efficient Utilization and Protection Engineering)

  • Wenbao Qiao

    (Yellow River Engineering Consulting Co., Ltd)

  • Ruichao Zhao

    (Kunming Engineering Corporation limited)

Abstract

Extreme rainfall events have triggered urban flooding, posing substantial threats to urban sustainability and public safety. The effectiveness of sponge city initiatives in mitigating urban flooding has garnered considerable attention. This study developed a one-dimensional and two-dimensional urban flood model using the Storm Water Management Model (SWMM) and Personal Computer (PC) SWMM to simulate and analyze urban flooding under various rainfall recurrence intervals. The effectiveness of three Low Impact Development (LID) combinations for sponge city implementation was evaluated, and the associated construction costs were calculated. The results indicated that the LID combinations significantly reduced surface runoff and pipe overflow, with the runoff coefficient decreasing to as low as 19.01%. However, the improvement under extreme storm conditions was limited. Considering both urban flood mitigation and life cycle costs, a combination of permeable paving, green roofs, and rain gardens was identified as the most effective LID measure. This study aims to provide technical guidance for urban flood management and planning practices.

Suggested Citation

  • Zhiwen Zheng & Xianqi Zhang & Wenbao Qiao & Ruichao Zhao, 2025. "Emergency Response to Urban Flooding: An Assessment of Mitigation Performance and Cost-Effectiveness in Sponge City Construction," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 39(5), pages 1993-2007, March.
    • Handle: RePEc:spr:waterr:v:39:y:2025:i:5:d:10.1007_s11269-025-04139-0
    DOI: 10.1007/s11269-025-04139-0
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    References listed on IDEAS

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    1. Yan Chen & Hao Hou & Yao Li & Luoyang Wang & Jinjin Fan & Ben Wang & Tangao Hu, 2022. "Urban Inundation under Different Rainstorm Scenarios in Lin’an City, China," IJERPH, MDPI, vol. 19(12), pages 1-18, June.
    2. Kyu-Won Seo & Seung Beom Seo & Kyeung-Min Kim & Chan Park & Park Hyemin & Jonghyun Yoo, 2024. "Genetic algorithm-based allocation of LID practices to mitigate urban flooding," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 120(1), pages 447-462, January.
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