| 洪水径流系数的尺度效应研究 |
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| 引用本文： | 李建柱,冯平,李绍飞. 洪水径流系数的尺度效应研究[J]. 自然灾害学报, 2011, 0(1) |
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| 作者姓名： | 李建柱 冯平 李绍飞 |
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| 作者单位： | 天津大学建筑工程学院;天津农学院水利工程系; |
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| 基金项目： | 国家自然科学基金(50879051); 水利部公益性行业科研专项(200901028) |
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| 摘 要： | 洪水径流系数是表征降雨径流过程的一个重要参数,以往对径流系数的尺度效应基本上是在坡面或者小流域上进行观测或试验。通过统计滦河流域6个中大尺度子流域汛期的暴雨洪水过程,计算了各场暴雨洪水的径流系数,发现径流系数随着流域面积的增大而减小,并分析了产生这种趋势的原因。结果表明,降雨空间分布不均匀性、单位面积地下径流出流能力及下渗都能引起径流系数的尺度效应。认识径流系数的尺度效应,对于研制开发不同尺度的、具有物理机制的流域水文模型,防洪减灾具有一定的指导意义。
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| 关 键 词： | 滦河流域 径流系数 尺度效应 流域面积 |
Study on scale effect of flood runoff coefficient |
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| LI Jian-zhu,FENG Ping,LI Shao-fei. Study on scale effect of flood runoff coefficient[J]. Journal of Natural Disasters, 2011, 0(1) |
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| Authors: | LI Jian-zhu FENG Ping LI Shao-fei |
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| Affiliation: | LI Jian-zhu1,FENG Ping1,LI Shao-fei2 (1.School of Civil Engineering,Tianjin University,Tianjin 300072,China,2.Tianjin Agriculture University,Tianjin 300384,China) |
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| Abstract: | Runoff coefficient is a very important parameter to describe runoff dynamics.The scale effects on runoff coefficients have been observed by several researchers on plots or small watershed,however,little research has been done on meso-scale and large-scale catchments.So six meso-scale and large-scale sub-basins of the Luanhe River Basin were selected for calculating the runoff coefficients of single event during 1956-2002.An obvious reduction in average event runoff coefficients from 0.43(Liuhe basin) to 0.1... |
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| Keywords: | Luanhe River Basin runoff coefficient scale effect catchment area |
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