初期雨水调蓄池运行效率的计算机模型评估

Evaluation of Computer Model for Operation Efficiency of Initial Rainwater Detention Tank

利用排水系统水力模型对上海世博园区的规划雨水系统进行了水力模拟,评价了初期雨水调蓄池控制城市面源污染的长期效果。结果表明:按照调蓄容量为30m3/hm2的设计标准,在上海市平水年降雨条件下,调蓄池每年能够拦蓄约50%的雨水径流量;在分流制雨水系统具有一定初期效应的情况下,上述初期雨水调蓄池污染物的去除率为42.9%～67.4%;对于半分流制系统,在降雨期间允许向污水总管截流初期雨水的条件下,调蓄池具有更高的截流比例。

Hydraulic model for drainage system was used to hydraulically simulate the planning rainwater system in Shanghai EXPO area, and evaluate the long-term efficiency of initial rainwater detention tanks for controlling urban non-point pollution. The result shows that according to the design standard of 30 m^3/hm^2, the detention tanks can annually intercept about 50% storm runoff under average annual rainfalls in Shanghai. When the separate rainwater system has a certain initial effect, the pollutants removal rates of the detention tanks are between 42.9% and 67.4%. For the semi-separate system, if interception is allowed during rainfall, the detention percentage is higher.