基于SWMM模型的低影响开发与综合管廊雨水舱协同建设研究OA

For the prominent challenges of urban waterlogging and rainwater resource loss in rapid urbanization,the collaborative regulation mechanism of low impact development(LID)measures and the rainwater compartment in utility tunnels were explored in this study.Taking a new district in Shijiazhuang,Hebei Province,North China Plain as the case,a hydrological and hydraulic simulation system was constructed using the storm water management model(SWMM).Multiple scenarios of the presence/absence of utility tunnel rainwater compartment,different pipe diame-ters,and combinatorial LID measures were set to systematically simulate the rainwater regulation characteristics un-der four rainfall return periods of 5,20,50,and 100-year.The results demonstrate that the collaborative applica-tion of LID and utility tunnels significantly outperforms single technical solutions,the runoff volume was reduced by an average of 19％,the maximum reduction of pipeline overload ratio reached 50％,and the maximum reduction of node overflow ratio was 55％.Meanwhile,the adaptive relationship between utility tunnel rainwater compartment pipe diameter and rainfall return period was clarified,as well as the stable regulation efficiency of LID measures un-der different rainfall intensities.The collaborative mode of"source infiltration reduction+terminal efficient dis-charge"established in this research provides quantitative data support and operable technical references for the in-tegrated planning and design of sponge cities and utility tunnels in cold regions.