基于流量调查的分流制雨水系统诊断研究

分流制雨水系统的非雨水入流不但影响其正常的排涝功能，而且混接污水的直接排放还易导致受纳水体的严重污染。为了制定合理的系统改造方案，首先需要对系统状况进行分析诊断。为此，结合上海市早期建造的某分流制雨水系统改造工程，进行了以流量调查为基础的系统分析诊断研究，掌握了该系统同时存在雨污混接、与河道直接连通等复杂水力情况，为进行系统改造方案决策提供了依据。研究成果与方法对其他雨水系统的分析诊断有参考价值。

Diagnostic Study on Split-flow Rainwater System Based on Flow Survey

The drainage function of split-flow rainwater system is affected by non-rainwater inflow, and directly discharging the mixed wastewater can cause serious pollution of receiving bodies. In order to formulate a reasonable reconstruction scheme of the system, it is necessary to analyze and diagnose firstly the system. Therefore, combining the reconstruction project of a split-flow rainwater system early built in Shanghai City, an analytic and diagnostic study based on the flow survey was conducted, and the complicated hydraulic situation coexisting in the system such as rainwater and wastewater mixture, direct connection with rivers was found out, which provided the basis for deciding the system reconstruction scheme. The research result and method have a reference value for diagnosing other rainwater systems.