基于SWMM低影响开发模块的城市雨洪模拟与分析

Urban Storm Water Modeling and Analysis Based on SWMM LID Modules

以成都市金牛区城市绿舟花园小区及附近区域为研究对象,运用SWMM模型模拟了该区域在现状条件和采用低影响开发（LID）措施情景下,遭遇不同重现期设计暴雨时的排水管道出口断面径流过程,分析和评估了基于海绵城市理念的LID措施对城市雨洪的削减效果。结果表明LID措施对城市雨洪具有削减和滞留作用,而且在低重现期暴雨情况下,LID措施对城市雨洪的控制作用更加显著,可为城市雨洪控制提供参考。

The urban green garden department and its surrounding areas in Jinniu District, Chengdu city were selected as the study area. The SWMM（Storm Water Management Model） was used to simulate the discharge hydrographs at the outlets of the drainage system when the study area encountered design storm with different return periods under current situation and LID（Low Impact Development） applied situation. The results were then analyzed to estimate the reduction effects of sponge city with LID measures on urban storm flood. The results show that LID measures can effectively reduce urban storm flood, and the reduction effects are more obvious when the return period of design storm is smaller,which will provide reference for the application of LID measures in the urban storm floodcontrol.