基于 PCSWMM 模型的广州典型社区海绵化改造水文效应研究

随着城市化进程加快和海绵城市建设的不断推进，低影响开发（LID）措施在城市建设中备受重视。为评估LID措施效果，构建研究区域PCSWMM模型，模拟分析重现期分别为0.5、1、2、5、10和20年的设计降雨情形下LID 设施的水文效应，结果表明下凹式绿地、绿色屋顶和透水铺装等LID措施的不同组合方案对径流量和污染物均有不同程度的削减能力，且削减效果随着降雨重现期增大而减少，同时设置下凹式绿地、绿色屋顶和透水铺装的组合能达到最佳削减效果，对径流量、BOD5、CODCr、TSS、NH3-N、TN和TP的最大削减率分别为64.77%、56.93%、57.44%、51.20%、51.91%、55.29%和71.37%。

Study on Hydrological Effect of Typical Community Sponge Transformation based on PCSWMM in Guangzhou

With the acceleration of urbanization and the continuous advancement of the construction of the sponge City, the Low Impact Development (LID) measures have been attached great importance to the urban construction. In order to evaluate the effect of LID measures, the PCSWMM model was constructed to simulate the hydrological effects of the LID facility at the 0.5,1,2,5,10 and 20 year design rainfall scenarios in the research area. The results show that different combinations of LID measures, such as concave green space, green roof and permeable pavement, have different degrees of reduction in runoff and pollutants. The reduction effect decreases while  rainfall return period increases. The best results can be achieved by the combination of sunken green space, green roof and permeable pavement at the same time. The maximum reductions rate of runoff, BOD5, CODCr, TSS, NH3-N, TN and TP were 64.77%, 56.93%, 57.44%, 51.20%, 51.91%, 55.29% and 71.37%  respectively.