水力发电学报2024，Vol.43Issue(3)：24-34,11.DOI:10.11660/slfdxb.20240303
小区尺度雨洪过程模拟及径流分配特性研究
Study on simulations of rainfall-flood processes and runoff allocation characteristics on community scale
摘要
Abstract
In this work,we study the proportions of different components of surface runoff on a community scale and their variations with different return periods of rainfall,using the GAST-SWMM coupled model and a case study of the Tianfu Heyuan community in Xixian New Area,and focusing on different simulation durations and different terrain boundary conditions.We find that this model,after validated against two measured rainfall events,gives the coefficient of determination of 0.83 and 0.82,indicating a high accuracy of the 1D-2D coupled model.Under the two scenarios of the community considered in this study,its surface runoff discharge rate and network drainage rate increase asymptotically with the increase in the rainfall return period,while the proportion of soil infiltration and the surface depression filling rate decrease.The surface runoff discharge and network drainage mainly occur in the rainfall periods,accounting for 94.88%and 94.36%of their respective annual totals.The impact of terrain boundary conditions in the community on its runoff process simulations is not negligible.The average rate of surface runoff discharge varies from 9.42%of the fence wall case to 22.55%of the no wall case.This study is useful for drainage and flood control in the areas relatively lower than the surrounding terrains.关键词
城市内涝/径流过程/地表径流外排/分区模型/渐进曲线Key words
urban flooding/runoff process/surface runoff outflow/zoning model/gradual curve分类
水利科学引用本文复制引用
官保君,侯精明,李东来,王添,吕佳豪,范臣臣,高徐军,申若竹,黄绵松..小区尺度雨洪过程模拟及径流分配特性研究[J].水力发电学报,2024,43(3):24-34,11.基金项目
国家自然科学基金(52079106) （52079106）
中德合作交流项目(M-0427) （M-0427）
宁夏重点研发计划资助(2022BEG02020) （2022BEG02020）
