Urban Storm Water Modeling and Analysis Based on SWMM LID Modules
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.