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针对感潮河网城市地区产汇流特性,考虑河道排涝和管道排水的相互影响,采用SWMM模型对某研究区域内管渠系统进行概化。利用无因次潮位单位线法确定该区域沿江潮位过程,将区域防洪计算结果作为外河水位计算边界条件,输入经过同频率缩放的短历时设计暴雨过程,模拟计算了城市排水防涝过程。结果表明,水闸工程可有效控制各防洪分区的水位,河网水面率对防洪高水位具有一定的调节作用,管道排水和地面积水会因河道初始水位过高而受到影响。
Aiming at the characteristics of river production and convergence in the urban area of tidal river network and considering the interaction between river drainage and pipeline drainage, SWMM model is used to generalize the canal system within a certain research area. Based on the unit-line method of dimensionless tide potential, the process of tide level along the river was determined. The calculation results of regional flood control were used as the boundary conditions for the calculation of external water level. The rainstorm process was designed by short-duration time-scaling with the same frequency. The results show that the sluice project can effectively control the water level of various flood control subareas. The river surface water rate has a certain regulatory effect on flood control high water level. The drainage of pipelines and surface water will be affected by the high initial water level of the river channels.