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随着城市化进程的加快以及极端天气的频繁出现,城市内涝问题日益突出。交通损失为超标暴雨积水造成的主要损失之一。从暴雨内涝积水原理及交通通行规律的研究入手,综合运用气象水文、交通、气象、遥感、地理、灾害等学科的理论,以北京典型桥区为研究对象,基于高分辨率的DEM地形资料和降水、土地利用数据,构建典型桥区的一维雨洪模型,采用函数拟合的溢流量—积水深度曲线法模拟道路实际积水过程;耦合桥区一维雨洪模型与交通仿真模型,定量研究了内涝积水对交通系统运行状态的影响度。结果表明,暴雨积水导致的车辆减速、绕行会大大降低交通系统的运行效率。研究成果可为暴雨条件下的交通影响分析提供参考。
With the acceleration of urbanization and frequent occurrence of extreme weather, the issue of urban waterlogging has become increasingly prominent. Traffic loss is one of the major losses caused by excessive rainfall. Beginning with the research on the principle of waterlogging and waterlogging in rainstorm and the law of traffic flow, the paper takes the typical bridge area in Beijing as the research object, based on the theories of meteorology, hydrology, traffic, meteorology, remote sensing, geography and disaster, And rainfall and land use data to construct a one-dimensional rainstorm model for a typical bridge area, and simulate the actual waterlogging process of the road by using the function-fitted overflow-water depth curve method. One-dimensional rainwater and coupled traffic simulation models , Quantitatively studied the effect of waterlogging on the operation of traffic system. The results show that vehicles caused by rainwater accumulation reduce speed and bypass will greatly reduce the operational efficiency of the traffic system. The research results can provide a reference for the traffic impact analysis under heavy rain conditions.