以SWMM模型为平台构建已建城市区域排涝模型,以广州市芳村高尔夫地块为研究区域,基于研究区域实测降雨、径流等资料对模型进行参数率定和验证,模拟在不同暴雨重现期下已建城市区域雨水管网的排涝能力。研究结果表明:该区域遭遇2 a一遇暴雨时,J14、J15和J31等3个排水节点出现积水;当遭遇5 a一遇时,J15片区和J31节点出现较为严重的积水,其中J15和J31节点积水量分别达到1 674、546 m3;积水时间分别为0.5、0.4 h。针对研究区域排水管网排涝能力偏低的现状,建议结合LID(Low Impact Development)措施,削减暴雨洪峰流量,提高区域排涝能力。文章构建的已建城市排水管网排涝能力评估方法,可识别区域主要积水黑点及管道满流管段,提供了一种动态、定性和定量评估排水管网能力的方法。 Based on the SWMM model, the urban drainage drainage model was constructed. Taking Fangcun golf land in Guangzhou as the research area, the model was calibrated and validated based on the measured rainfall and runoff in the study area. The drainage capacity of stormwater pipe network in urban areas has been built. The results show that there is water accumulation in three drainage nodes such as J14, J15 and J31 in a rainfall event of 2 years in this area. When encountering a 5-second encounter, there is serious water accumulation in J15 and J31, with J15 And J31 node water volume reached 1 674,546 m3 respectively; the water storage time was 0.5 and 0.4 h respectively. In view of the low drainage capacity of the drainage network in the study area, it is suggested that measures such as Low Impact Development (LID) be adopted to reduce the peak flow and increase the drainage capacity. The method for assessing the drainage capacity of an existing urban drainage network constructed by the article can identify the main water storage black spots in the area and the full flow section of the pipeline and provide a dynamic, qualitative and quantitative method for assessing the capacity of the drainage network.