摘要
降雨是影响坡面产流的重要因素,不同的降雨特征会影响降雨径流过程。为探究降雨雨型和降雨峰值因素耦合对坡面径流过程的影响,设计了两组降雨雨型,其峰值分别落在整个降雨过程的前期和后期,进行了降雨径流模拟试验,构建了基于运动波模型的坡面径流数学模型,开展了相应的降雨径流过程数值模拟,分析了径流特征值随降雨特征的变化规律。结果表明:随着降雨峰值增大,两种雨型产生的径流总量和径流峰值均以指数形式增长,在降雨雨型相同时,径流总量和径流峰值呈线性相关。对不同的雨型来说,当降雨总量和降雨历时相同时,后峰型降雨会比前峰型降雨多产生约1/4的径流。
Rainfall is an important factor affecting hillslope runoff,different rainfall characteristics will change the runoff process.In order to explore the coupling influence of rainfall patterns and peak amount on the hillslope runoff process,two rainfall patterns with unique rain intensity processes that fall in the early and late periods of the entire rainfall process are designed.The simulation experiment of rainfall runoff is carried out.A mathematical model of hillslope runoff based on motion wave equation is constructed,the virtual working condition simulation of the rainfall runoff process is carried out.The variation law of runoff characteristic value with rainfall characteristic is analyzed.It is concluded that with the increase in rainfall peak,the runoff volume and runoff peak value generated by the two rain patterns both increase exponentially,and showing a linear correlation under same rainfall pattern.For different rain types,when the rainfall amount and duration are the same,the posterior peak rainfall produces about 1/4 more runoff than the anterior peak rainfall.
作者
朱奎
强思远
母小苗
刘唐琼
李杰
ZHU Kui;QIANG Si-yuan;MU Xiao-miao;LIU Tang-qiong;LI Jie(College of Resources and Geoscience,China University of Mining and Technology,Xuzhou 221116,Jiangsu Province,China)
出处
《中国农村水利水电》
北大核心
2021年第4期33-37,共5页
China Rural Water and Hydropower
基金
国家自然科学基金项目(51679252,51409246)。
关键词
降雨雨型
数值模拟
运动波模型
径流特征值
模拟工况
rainfall characteristics
numerical simulation
motion wave model
runoff eigenvalue
simulate working condition
