SWMM模型在城市雨水管网改造中的应用

The Optimization and Modification of the Urban Drainage System Based on SWMM Model

结合研究区特点,运用SWMM模型构建集防洪、排涝、排水于一体的暴雨内涝模型,模拟城市内涝,分析不同重现期降雨过程下地表径流、检查井溢流、管道超载情况,评估雨水管网系统的排水能力。根据对研究区管网超载现状的分析,总结管道排水能力不足的原因,探究提升管网系统排水能力与缓解内涝风险的措施,提出管网优化设计方案,并模拟分析改造方案的效果。研究对其他类似城市具有借鉴意义。

Taking the characteristics of the study area into consideration,a comprehensive rainstorm model based on SWMM is developed,which contains flood and waterlogging control.It simulates urban waterlogging,analyzes the surface runoff under different return periods of rainfall process,manhole overflow and pipeline overload situation,evaluates drainage capacity.According to the current situation of drainage pipelines in the study area and reasons for the shortage of the drainage capability,a pipe network optimal design scheme is put forward,which improves the capacity of drainage system and alleviate waterlogging risk.SWMM model is used to simulate and analyze the effects of the retrofit scheme.Simulation method used in the research can be extended in other urban drainage system optimization retrofit schemes.