Study on Flood Control in Multi-LID Model Based on SWMM

• DOI: 10.1061/9780784483114.003
• Publication Date: 2020-07-16T10:01:06Z
• Authors: Bo Sun; Shuibo Xie; Zhiyuan Wang; Haoyi Wu; Hui Liu
• Keywords: Impervious surface; Bioretention; Low-impact development; Rainwater Harvesting; Green roof; Waterlogging (archaeology); Flood control; Urban area

With the acceleration of urbanization process, and increase impervious surface area, problems urban waterlogging are becoming more serious. How to effectively reduce frequency rain flooding its impact destruction has become a major problem in construction. This paper selects area around Guangming Phoenix New City Park District, Shenzhen, constructs regional rainfall runoff model by SWMM model, simulates operation existing drainage network degree under six types rainstorm return period 1a, 3a, 5a, 10a, 20a, 50a. Consequently, on this basis, four kinds low development (LID) measures including separating placement bioretention cells, green Roof, permeable paving, barrels, combined arrangement as fifth schemes, used stimulate reduction total peak flow. By comparison, current state study, LID combination best effect reducing runoff, followed barrels; roof is worst. In terms flow delaying time flow, best, roof; worst barrels. basis consider combining with sponge city special plan. future, it expected inspire construction cities south coastal cities, especially measures.