【摘要】 相对于太浦河洪水风险图编制的研究范围,太浦河是一条狭长的河道,河道内如采用二维水动力模型数值计算将影响洪水风险系统调用数据的效率和可视化的效果,可考虑河道内采用一维水动力模型计算。为了验证一维水动力模型是否能应用于太浦河洪水风险编制中的太浦河河道洪水演算,运用一维、二维水动力模型对太浦河河道分别进行了恒定情况和非恒定情况的洪水演算。一维、二维水流数值模型的计算结果表明:水位与断面平均流速吻合性较好。因此得出结论:用一维水动力模型在计算太浦河河道内洪水演算具有与二维水动力数学模型相当的精度,并能大大提高洪水风险系统调用数据的效率,并提高了可视化的效果。更多还原

【Abstract】 Compared with the domain of flood risk mapping of Taipu river region,Taipu river is respectively a long and narrow channel.So the use of two dimensional hydrodynamic model to simulate flood propagation in river channel will ultimately affect the efficiency and visualization of Flood Risk Mapping system.Thus, one dimensional hydraulic model is considered alternatively in flood propagation simulation in Taipu River.With the purpose to find the feasibility of using one-dimensional hydrodynamic model to simulate flood propagation in Taipu river for Flood Risk Mapping of Taipu region.The computation results of 1D and 2D numerical flow simulation models demonstrate that the water level and cross-section average flow velocity have preferable consistency.So,the conclusion can be obtained that computation of flood propagation in river channel by 1D hydrodynamic model has the same accuracy with the result of 2D hydrodynamic model,and greatly improve data use efficiency by flood risk system and visualization effect.更多还原