水利水电技术（中英文）2024，Vol.55Issue(7)：45-54,10.DOI:10.13928/j.cnki.wrahe.2024.07.004
降雨径流过程对不透水面空间分布的响应解析
Response analysis of rainfall runoff processes to spatial distribution of impervious area
摘要
Abstract
[Objective]Urbanization leads to complex spatial feature of urban underlying surface,in which the significant feature is the formation of complex spatial relationship between impervious surfaces and permeable area,which has some impact on the urban surface runoff process.Further exploration of the response mechanism of rainfall-runoff processes to impervious surface spa-tial distribution is conducive to scientific understanding of urban hydrological effects.[Methods]We conducted rainfall-runoff la-boratory experiments,calibrated and validated the parameters of the two-dimensional hydrodynamic model based on experimental data,a rainfall-runoff model with an area size of 1 km× 1 km based on the two-dimensional hydrodynamic method was constructed,based on the validated parameters.Simulations of runoff processes in three real rainfall scenarios and four types of urban impervi-ous surface spatial distribution scenarios(upstream,midstream,downstream,and randomly distributed)are conducted,the sur-face runoff processes and characteristics under different scenarios are analyzed.[Results]The result show that,the difference in runoff coefficients between the upstream distribution and random distribution accounts for the largest difference ratio,up to 59.9％,under the scenarios of rainfall A(rainfall 10.0 mm)and 20％imperviousness.Under rainfall scenario B(rainfall 51.8 mm),the maximum runoff flow difference is 67％.[Conclusion]Under the same imperviousness rate,the spatial distribu-tion of impervious area has some influence on the runoff process and runoff characteristics,and the impact rate usually decreases with the increase of rainfall intensity.Under the same rainfall and imperviousness rate,among the four spatial distribution scenar-ios of impervious area set in this study,the random distribution of impervious area has a relatively greater impact on the runoff process compared to other distributions.The result of the study may provide some reference for urban runoff control and urban flood prevention.关键词
数值模拟/城市内涝/降雨/径流过程/不透水面/城市化Key words
numerical simulation/urban waterlogging/rainfall/runoff process/impervious area/urbanized分类
建筑与水利引用本文复制引用
石虹远,梅超,刘家宏,王佳,栾清华,宋天旭,董莉榕,李玉龙..降雨径流过程对不透水面空间分布的响应解析[J].水利水电技术（中英文）,2024,55(7):45-54,10.基金项目
国家自然科学基金项目(52009139) （52009139）
国家重点研发计划(2022YFC3090600,2021YFC30001404) （2022YFC3090600,2021YFC30001404）
中国水利水电科学研究院基本科研业务费项目(WR110145B0012023,WR110145B0022022) （WR110145B0012023,WR110145B0022022）
