海绵城市地表水与地下水耦合模型研究

Study on Coupling Model of Surface Water and Groundwater in Sponge City

采用SWMM及二次开发的GMS软件,通过建立地表水及地下水耦合模型,模拟了武汉市七零七小区的海绵城市功能,通过模拟结果证实研究区经过海绵城市改造施工后地表水的径流排放控制率为38%,达到了海绵城市设计要求的控制率小于40%的要求。海绵城市也使地表水的水质得到明显改善,总悬浮固体值从100mg/L降低到70mg/L,地下水也得到了较大的补给,最高补给时段地下水位上升了8mm。

In this paper,SWMM and GMS software are used to simulate the sponge city function of No.707 residential district in Wuhan city through the establishment of surface water and groundwater coupling model.The simulation results show that the runoff discharge control rate of surface water in the study area after the sponge city reconstruction is 38%,which meets the requirements of sponge city design,and the control rate is less than 40%.The surface water quality in sponge city has also been significantly improved.The TSS value has been reduced from 100mg/L to 70mg/L.The groundwater has been greatly replenished,and the groundwater level has increased by 8 mm during the maximum recharge period.