基于SWMM模型的雨水管网优化

Optimization of Rainwater Drainage System Based on SWMM Model

利用SWMM模型模拟所选区域排水系统的运行现状,分析得出其"瓶颈制约",并提出改变节点高程和增大管径这两种管网改造方案。在两年重现期下,两种改造方案分别使整个排水系统的溢流量减少了44.78%和81.62%,明显缓解了节点溢流和管道过载情况。进一步模拟两种改造方案下管道的淤积情况,发现增大管径这一方案缓解节点溢流和管道过载的效果比较理想。这为城市排水管网优化设计、管网改扩建和管道养护提供了技术支持。

The operation of the rainwater drainage system in a chosen area was simulated using the storm water management model （SWMM）. The ＂bottleneck＂ of the rainwater drainage system was found out. The reconstruction schemes of the system by relocating the pipe node position and enlarging the pipe diameter were presented. In two-year rainfall recurrence period, the overflow rates of the whole drainage system are reduced by 44.78% and 81.62% respectively by the two reconstruction schemes. Mean-while, the node overflow and pipe surcharge were distinctly eased. The simulation of pipe siltation shows that enlarging the pipe diameter is ideal for easing node overflow and pipe surcharge, which provides technical support for optimized design, reconstruction, extension and maintenance of urban drainage system.