基于SWMM的昆明市船房片区合流制排水系统模拟

Modeling of Combined Drainage Networks in Chuanfang River Basin of Kunming City Based on SWMM

为了预防昆明市城市道路积水等情况,采用城市暴雨洪水管理模型(SWMM)建立了昆明市主城区船房河流域合流制排水管网模型。在对污水排放流量及方式进行监测的基础上,引入居民区、商场、学校和宾馆四种不同用水类型,通过对昆明市两场典型降雨进行模拟,分析其在污水入流、雨水入流、时间峰值三者叠加共同作用下对合流制排水管网的影响。结果表明,两个出水口的流量模拟结果与监测数据的吻合性均较好,Nash-Sutcliffe效率系数为0.71～0.82,模型能模拟合流制排水管网的运行状态,分析系统的瓶颈节点和限制性管道,为制定排水管网系统的改造策略提供了科学参考。

To prevent standing water on urban roads in Kunming City, a model for simulating combined drainage networks in Chuanfang River basin was established based on the storm water management model （SWMM）. The sewage discharge flow and pattern in residential, commercial, school and hotel areas were introduced into the model. Two typical rainfalls were simulated, and the combined effects of sewage inflow, rainwater inflow and time to peak inflow on the combined drainage networks were analyzed. The results showed that the simulation results of flow at two outlets were consistent with the monitoring data. Nash-Sutcliffe efficiency coefficient was 0.71 to 0.82. The model could be used to simulate the running status of combined drainage networks and analyze bottleneck nodes and restricted pipe sections.