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A Calculation Method for Flood Control Benefits of River Treatment Projects Considering the Uncertainty of Flood Peak and Flood Frequency

Author

Listed:
  • Yadong Zhang

    (Zhengzhou University
    Zhengzhou University)

  • Siwei Wang

    (Zhengzhou University)

  • Wei Ge

    (Zhengzhou University
    Yellow River Engineering Consulting Co., Ltd)

  • Zongkun Li

    (Zhengzhou University)

  • Haodong Li

    (Zhengzhou University)

  • Weibing Du

    (Henan Yangtze-to-Huaihe Water Diversion Co., Ltd)

  • Hui Wang

    (Henan Yangtze-to-Huaihe Water Diversion Co., Ltd)

  • Yongzhi Wang

    (Henan Qianping Irrigation District Engineering Co., Ltd)

Abstract

River treatment projects yield significant flood control benefits, which mainly depend on the scale and frequency of floods. However, existing calculation methods for the flood control benefits of river treatment projects fail to comprehensively consider the uncertainty of flood peak and flood frequency. We proposed a quantitative method for calculating the flood control benefits of river treatment projects that takes these two uncertainties into full account. First, we simulated floods with different return periods before the construction of project and calculated the economic losses. The reduction in economic losses after the project treatment was regarded as the flood control benefits, and thus, the peak discharge-flood control benefits curve of the project was obtained. Subsequently, the flood peak sequence was generated randomly through Monte Carlo simulation. This sequence was then substituted into the peak discharge-flood control benefits curve to calculate the average single flood control benefits of the project. The average annual flood frequency was calculated based on the frequency analysis of peak-over-threshold (POT) floods. Based on the average single flood control benefits and the average annual flood frequency, a method for calculating the flood control benefits of river treatment projects was proposed. Taking the Shuangji River treatment project as an example, the average flood control benefits of a single flood were calculated to be 157 million RMB, and the average annual flood control benefits of the project were 424 million RMB. This method considers the uncertainty of flood peak and flood frequency, making it more in line with the actual situation. It can also serve as a reference for the evaluation of flood control benefits of other water conservancy projects.

Suggested Citation

  • Yadong Zhang & Siwei Wang & Wei Ge & Zongkun Li & Haodong Li & Weibing Du & Hui Wang & Yongzhi Wang, 2025. "A Calculation Method for Flood Control Benefits of River Treatment Projects Considering the Uncertainty of Flood Peak and Flood Frequency," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 39(8), pages 4173-4187, June.
    • Handle: RePEc:spr:waterr:v:39:y:2025:i:8:d:10.1007_s11269-025-04153-2
    DOI: 10.1007/s11269-025-04153-2
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    References listed on IDEAS

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    1. Kaizhong Li & Shaohong Wu & Erfu Dai & Zhongchun Xu, 2012. "Flood loss analysis and quantitative risk assessment in China," 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. 63(2), pages 737-760, September.
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    4. Hexiang Zhang & Wei Ge & Yadong Zhang & Zongkun Li & Wei Li & Junyu Zhu & Wenqi Wang, 2023. "Risk Management Decision of Reservoir Dams Based on the Improved Life Quality Index," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 37(3), pages 1223-1239, February.
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