摘要
基于耦合水文过程的一、二维水动力模型,构建以皂河流域为研究对象的洪涝模型,开展当地雨洪过程的模拟研究,并利用2016年暴雨事件资料进行模型率定和验证。结果表明:模型模拟流量峰现时间与实测峰现时间相同(当日22时),且该时段计算水深达到2.96 m,峰现时间22时的实际测量最大水深与模拟计算最大水深的相对误差为15.4%,小于规定的20%,且当日高达70%以上实测积水点最大水深与模拟计算水深误差均控制在20 cm之间;模型计算流量约132.84 m 3/s,未超过原设计流量,纳什系数为0.62;模型计算结果与防洪预案中的淹没范围大致相同。模型可以准确模拟皂河流域洪水演进情况,并用于评估城市面临的洪涝风险,辅助城市管理者制定科学的紧急应对措施。
Based on the one-dimensional and two-dimensional hydrodynamic model coupled with the hydrological process,a flood model taking the Zao River Basin as the research object is constructed to carry out the simulation study of the local rainstorm flood process.The data of the rainstorm event in 2016 are used for model calibration and verification.The results show that the peak appearance time of the simulated flow by the model is the same as that of the measured flow(22:00 on the same day),and the calculated water depth during this period reaches 2.96 m.The relative error between the maximum measured water depth at 22:00(the peak appearance time)and the maximum simulated water depth is 15.4%,which is less than the specified 20%.Moreover,the errors between the maximum water depths of more than 70%of the measured water accumulation points on that day and the simulated water depths are all controlled within 20 cm.The calculated flow of the model is about 132.84 m 3/s,which does not exceed the original designed flow,and the Nash coefficient is 0.62.The calculated result of the model is roughly the same as the inundation range in the flood control plan.The model can accurately simulate the flood routing in the Zao River Basin,and it can be used to evaluate the flood risk faced by the city and assist urban managers in formulating scientific emergency response measures.
作者
杨祎慧
杨磊
Yang Yihui;Yang Lei(Xi'an Water Disaster Prevention and Control Management Center,Xi'an 710000,China)
出处
《西北水电》
2025年第1期51-57,共7页
Northwest Hydropower
基金
陕西省科技创新团队项目(2022TD-01)。
关键词
洪涝模型
数值模拟
洪水演进
决策支持
Flood Model
Numerical Simulation
Flood Routing
Decision Support
