The campus is facing the problems of waterlogging and runoff pollution. To mitigate these phenomena, this study constructs a SWMM model using a campus as the study area. The reduction effects of runoff volume and pollutant load under four LID facility combination scenarios were simulated. Eleven evaluation indicators were selected from environmental, economic and social aspects, and the weights of each indicator were calculated by applying the CRITIC method. The relative percentage of different rainfall recurrence periods under the same evaluation indicator was obtained. The composite index method is used to calculate the composite index for each scenario. The combination of rain garden, permeable pavement, bioretention and green roof is determined as the optimal scenario. The Fuzzy pattern recognition method is used to select three representative rainfall events and simulate the reduction effect of runoff volume and pollutant load under four scenarios to further verify the optimal scenario. The results show that the reduction rates of runoff volume and pollutant load under scenario 4 are 2.7%, 4.2% and 4.7% higher than those under scenarios 1, 2 and 3. Based on the above study, the optimal LID facility combination selected in this paper will provide a reference for the construction of sponge facilities similar to this study area.

校园面临着内涝和径流污染的问题。为了缓解这些现象，本研究构建了一个以校园为研究区域的 SWMM 模型。模拟了四种 LID 设施组合情景下径流量和污染物负荷的减少效果。从环境、经济和社会三个方面选取了11个评价指标，采用CRITIC法计算各指标的权重。得到同一评价指标下不同降雨重现期的相对百分比。综合指数法用于计算每个情景的综合指数。雨水花园、透水路面、生物滞留和绿色屋顶的组合被确定为最佳方案。采用模糊模式识别方法，选取三个具有代表性的降雨事件，模拟四种情景下径流量和污染物负荷的降低效果，进一步验证最优情景。结果表明，情景4下径流量和污染物负荷的减少率分别比情景1、2和3下分别高出2.7%、4.2%和4.7%。基于上述研究，本次选取的最优LID设施组合论文将为类似本研究区的海绵设施建设提供参考。