基于一二维耦合模型的山东省弥河干流平交道口洪水风险分析  

Analysis of flood risk at the Level-crossing of Mainstream Intersection of Mihe River in Shandong Province based on 1D-2D coupled model

作　　者：郝建浩 王封祚 牛小茹 HAO Jianhao;WANG Fengzuo;NIU Xiaoru(Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003)

机构地区：[1]黄河勘测规划设计研究院有限公司,郑州450003

出　　处：《中国防汛抗旱》2025年第3期46-51,共6页China Flood & Drought Management

摘　　要：为评估弥河干流平交道口的洪水淹没风险,通过构建一二维耦合水动力数学模型,模拟计算50年一遇和100年一遇设计洪水淹没过程,从淹没范围、平均淹没水深、不同量级淹没水深及占比、淹没历时、不同时刻流场变化等分析平交道口淹没风险。计算结果表明,现状平交道口还存在较大的洪水淹没风险,漫溢洪水持续时间在48 h左右,淹没区淹没水深以小于0.5 m为主,淹没历时在24 h以上占比较高。模拟分析结果可为未来河道防汛、桥梁改建提供相关决策参考,同时助推弥河流域数字孪生建设,以期为未来实现流域洪水风险的精准预测、及时预警提供理论支撑。In order to evaluate the flooding risk of the level crossing of the main stream of the Mihe River,the design flooding process of 50 and 100 years return periods was simulated and calculated by constructing a one-and two-dimensional coupled hydrodynamic mathematical model,and the flooding risk of the Level-crossing was analyzed from the inundation range,average submerged water depth,submerged water depth and proportion of different magnitude,submerged duration,and flow field changes at different times.The calculation results show that there is still a greater risk of flooding if the current Level-crossing is not blocked,the duration of the overflow flood is about 48 h,the depth of the submerged water in the inundation area is mainly less than 0.5 m,and the proportion of the inundation range lasting more than 24 h and above is relatively high.The simulation analysis results can provide decision-making references for future river flood control and bridge reconstruction,and at the same time promote the construction of digital twins in the Mihe River Basin,providing theoretical support for accurate prediction and timely warning of flood risks in the river basin in the future.

关 键 词：弥河干流 平交道口 水动力数学模型 洪水风险 

分 类 号：TV877[水利工程—水利水电工程]