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    和思羽，张垚宾，刘桓语，等. 山丘区中小流域设计暴雨洪水模拟方法研究——以天津市杨庄水库为例[J]. 中国防汛抗旱，2025，35（2）：24−29. DOI: 10.16867/j.issn.1673-9264.2025038
    引用本文: 和思羽，张垚宾，刘桓语，等. 山丘区中小流域设计暴雨洪水模拟方法研究——以天津市杨庄水库为例[J]. 中国防汛抗旱，2025，35（2）：24−29. DOI: 10.16867/j.issn.1673-9264.2025038
    shu
    HE Siyu，ZHANG Yaobin，LIU Huanyu，et al.Study on design rainstorm flood simulation method in small and medium watersheds of hilly area — Taking Yangzhuang Reservoir of Tianjin City as an example[J].China Flood & Drought Management，2025，35（2）：24−29. DOI: 10.16867/j.issn.1673-9264.2025038
    Citation: HE Siyu，ZHANG Yaobin，LIU Huanyu，et al.Study on design rainstorm flood simulation method in small and medium watersheds of hilly area — Taking Yangzhuang Reservoir of Tianjin City as an example[J].China Flood & Drought Management，2025，35（2）：24−29. DOI: 10.16867/j.issn.1673-9264.2025038
    shu

    山丘区中小流域设计暴雨洪水模拟方法研究以天津市杨庄水库为例

    Study on design rainstorm flood simulation method in small and medium watersheds of hilly area — Taking Yangzhuang Reservoir of Tianjin City as an example

      摘要
    • 摘要: 以天津市杨庄水库为例，使用中国山洪水文模型进行洪水模拟计算，分析流域内小流域单元和分级嵌套流域的洪峰流量频率值。结果表明：中国山洪水文模型适用于山丘区中小流域洪水模拟，14场洪水的洪量相对误差绝对值平均为12.0%，洪峰流量相对误差绝对值平均为9.0%，洪峰时间相对误差绝对值平均为1.1 h，纳什系数平均为0.82。小流域5年一遇、10年一遇、20年一遇、50年一遇、100年一遇洪水的洪峰流量平均值分别为27 m3/s、53 m3/s、85 m3/s、132 m3/s、172 m3/s，各逐级合并流域的洪峰流量平均值分别为122 m3/s、137 m3/s、382 m3/s、611 m3/s、777 m3/s。研究成果可为山丘区中小流域设计暴雨洪水模拟研究提供方法和技术参考，可为杨庄水库流域的洪水预报提供技术支撑。

       

      Abstract: Taking Yangzhuang Reservoir in Tianjin City as an example, the flood simulation calculation is carried out by using the China Flash Flood Hydrological Model(CNFF), and the flood peak flow frequency values of small watershed units and hierarchical nested watersheds in the basin are analyzed. The results show that the CNFF model is suitable for flood simulation in small and medium-sized watersheds in hilly areas. The average absolute value of relative error of peak volume of 14 floods is 12.0%, the average absolute value of relative error of flood peak flow is 9.0%, the average absolute value of relative error of flood peaking time is 1.1 h, and the average Nash coefficient is 0.82. The average peak flow of 5-year, 10-year, 20-year, 50-year, 100-year small watersheds are 27 m3/s, 53 m3/s, 85 m3/s, 132 m3/s, 172 m3/s, respectively. The average peak flow of each hierarchical nested watershed is 122 m3/s, 137 m3/s, 382 m3/s, 611 m3/s, 777 m3/s. The research results can provide a method and technical reference for the design storm flood simulation of small and medium-sized watersheds in hilly areas, and provide technical support for the flood forecasting of Yangzhuang Reservoir watershed.

       

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