基于SWMM的城市排水管网优化模拟

SWMM based-simulation on optimization of urban drainage network

通过改变影响排水条件的因素如管径、管道坡度、下垫面性质、检查点埋深等,对不同情景下研究区域排水情况进行模拟,并对模拟结果进行分析评估,确定了影响管网溢流的主要原因。依据模拟结果,针对引起节点溢流的主要影响因素,相应地制定了多种方案对研究区域管网进行优化改造,并对优化后的管网再次进行模拟以检验优化效果,根据模拟结果从多种方案中选取最佳改造方案。研究结果可以对城市雨洪管网的设计和改建提供技术支持,以减少洪涝灾害造成的损失。

Through changing the factors those impact the drainage conditions, such as diameter of pipe, gradient of pipeline, properties of underlying surface, buried depth of inspection well-point, etc. , the drainage status within the study area is simula- ted under various scenarios, furthermore, the simulated result is analyzed and evaluated, while the main causations to impact the overflow of pipeline network are determined as well. Based on the simulated result, several schemes to optimize and improve the drainage network inside of the study area are accordingly made for the main impacting factors to cause the node overflows. Moreo- ver, the optimized network is simulated again for checking its optimized effect, and then the most optimal one is selected from several improvement schemes in accordance with the simulated result. This study result can provide a technical support for design and improvement of urban rain-flood pipeline network, so as to reduce the loss from flood disaster.