降雨径流过程对不透水面空间分布的响应解析

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国家科技期刊平台
NETL
NSTL
万方数据

中文摘要：[目的]城市化导致城市下垫面空间特征复杂化，其中显著特征是不透水面与透水面之间形成复杂的空间关系，对城市地表径流过程产生一定影响。进一步探索降雨径流过程对不透水面空间分布的响应机理，有利于深化城市水文效应科学认知。[方法]开展了降雨径流试验，基于试验数据对二维水动力模型参数进行了率定和验证，并基于所得参数构建了区域大小为1 km×1 km的降雨径流模型，开展了 3场真实降雨情景和4类(不透水面上、中、下游和随机分布)城市不透水面空间分布情景下的地表径流过程模拟，对不同情景下的地表径流过程和径流特征进行了分析。[结果]结果表明:在降雨情景A(降雨量10。0mm)和20％不透水率情景下，上游分布和随机分布之间的径流系数差值占比最大，可达59。9％;在降雨情景B下(降雨量51。8 mm)，最大径流流量差值占比为67％。[结论]在同一不透水率下，不透水面空间分布对地表径流过程和径流特征值有一定影响，其影响程度通常随着降雨强度的增加而减小;在同一降雨和不透水率下，在设置的4类不透水面空间分布情景中，不透水面随机分布对径流过程的影响相对其他分布较大。研究结果可为城市径流管控与洪涝防治提供一定参考。

外文标题：Response analysis of rainfall runoff processes to spatial distribution of impervious area

外文摘要：[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.

外文关键词：

numerical simulationurban waterloggingrainfallrunoff processimpervious areaurbanized

作者：

石虹远、梅超、刘家宏、王佳、栾清华、宋天旭、董莉榕、李玉龙

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作者单位：

河北工程大学河北省智慧水利重点实验室,河北邯郸 056038

中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京 100038

水利部数字孪生流域重点实验室(筹),北京 100038

河海大学水文水资源与水利工程科学国家重点实验室,江苏南京 210098

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关键词：

数值模拟城市内涝降雨径流过程不透水面城市化

基金：

国家自然科学基金项目国家重点研发计划国家重点研发计划中国水利水电科学研究院基本科研业务费项目中国水利水电科学研究院基本科研业务费项目

项目编号：

520091392022YFC30906002021YFC30001404WR110145B0012023WR110145B0022022

出版年：

2024

DOI：

10.13928/j.cnki.wrahe.2024.07.004

水利水电技术(中英文)

水利部发展研究中心

水利水电技术(中英文)

CSTPCD北大核心

影响因子：0.456

ISSN：1000-0860

年,卷(期)：2024.55(7)