运用数学模型分析城市雨水强排系统管网末端出流量与降雨量的关系

Using Mathematical Models to Analyze the Relation between the Outflow & the Rainfall at the End of the Pipe Network of Urban Rainwater Drainage System

利用InfoWorks ICM软件建立典型强排雨水系统水力模型,对系统末端自由出流量进行2D模拟,并加载绿、蓝等源头设施,对比不同降雨事件下现状和规划方案系统末端出流曲线与降雨量的关系。通过研究发现,强排系统天然存在一定的延缓峰值及削峰作用,加载绿、蓝设施能够加强排水系统缓排及削峰作用,从而提高排水系统的承受能力。

Using InfoWorks ICM software to establish a typical hydraulic model of strong drainage rainwater system,2D simulation of free flow at the end of the system,loading green,blue&other source facilities,and comparing the current situation of different rainfall events and the relationship between the end flow curve of planning scheme system&rainfall.Through the research,it is found that the strong drainage system naturally has the function of delaying the peak value and cutting the peak value.Loading green&blue facilities can strengthen the function of delaying the drainage system and cutting the peak value,so as to improve the bearing capacity of the drainage system.