为探讨低影响开发（low?impact?development，LID）设施对缓解城市洪涝灾害以及削减污染负荷的效果，选取 绿色屋顶、雨水花园、透水铺装和雨水罐 4 种 LID 设施，通过构建暴雨洪水管理模型（storm?water?management model，SWMM），并根据实际地形和管网走向将研究区汇水面分为不同分区，分析 LID 设施组合在 7 种布设方案 下对径流控制和雨水污染负荷减排的影响。结果表明：对于 7 种布设方案，LID 设施组合均能有效削减径流量和 雨水污染负荷，且分区布设时，LID 设施组合在上中游分区对径流量的控制效果较好；在相同设计降雨重现期下， 各布设方案的削减效果依次为全区>上中游分区>中下游分区>上下游分区>下游分区>中游分区>上游分区；LID 设施组合布设在下游分区时的径流量削减率较布设在上游分区提升 5.19%～6.82%，布设在上中游分区较布设在 上下游分区提升 1.87%～3.62%，较布设在下游分区提升 16.48%~18.97%；LID 设施组合全区布设较布设在下游分区 提升 29.60%～31.17%，较布设在上中游分区提升 12.20%～13.12%。因此，在海绵城市规划建设之前建议全区按需 布设 LID 设施，在进行老旧小区改造时可着重考虑将 LID 设施布设在上中游分区。

To investigate the effect of low impact development (LID) facilities on alleviating urban flood disaster and reducing pollution load, four kinds of LID facilities were selected, including green roof, rainwater garden, permeable pavement and rainwater tank. By constructing the SWMM model, the catchment surface was divided into different partitions according to the actual terrain and pipe network direction. The influence of LID facility combination on runoff control and rainwater pollution load under the seven layout schemes was analyzed, the results showed that the LID facility combination could effectively reduce the runoff and rainwater pollution load for the seven layout schemes, and the LID facility combination has a better control effect on the runoff in the upstream and midstream areas. Under the same design rainfall return period, the reduction effect of each layout scheme was as follows: the whole area > upstream and midstream areas > midstream and downstream areas > upstream and downstream areas > downstream area > midstream area > upstream area. The runoff reduction rate in the downstream area was 5.19% - 6.82% higher than the upstream area, the upstream and midstream areas were 1.87%- 3.62% higher than the upstream and downstream areas, and 16.48%-18.97% higher than the downstream area. When the whole area was deployed, it was 29.60%-31.17% higher than the downstream area and 12.20% -13.12% higher than the upstream and midstream areas.Therefore, before the planning and construction of sponge city, it was suggested that: the LID facilities should be set up on demand in the whole area; in the transformation of old residential areas, the LID facilities could be emphatically considered in the upstream and midstream areas.