都江堰河床质级配和推移质输沙率研究  

A Study on the Grain Size Distribution of Bed Material and Bed load Transport Rate in Dujiangyan Reach of Min River

作　　者：曲兆松[1,2] 李丹勋[1,2] 彭述明 王兴奎[1,2] 

机构地区：[1]清华大学水电系 [2]都江堰管理局

出　　处：《水力发电学报》1999年第3期62-70,共9页Journal of Hydroelectric Engineering

基　　金：国家教育部"跨世纪优秀人才计划"基金;国家"九五"攻关项目

摘　　要：以都江堰河段实测的河床质级配和卵石推移质资料为基础，经过分析计算得出：河床质代表粒径沿程的衰减符合倒数函数规律，卵石之间的碰撞破碎和磨损是该河段卵石沿程细化的重要因素。爱因斯坦推移质公式的计算结果与实测值基本一致，梅叶彼得公式计算的结果则明显偏小。在河流的涨水过程中，水流坡降变陡，挟沙能力增加，推移质输沙率加大。Field data of bed load transport are analyzed and the following results are obtained:The bed material gets finer along the stream,approximately obeying the reciprocal law.The abrasion and collision between moving gravel,as well as between moving gravel and particles resting on the river bed,are important contributors to this phenomenon.The bed load transport rate calculated by Einstein formula is in good agreement with the measured one.Meyer Peter formula provides much smaller estimates.During the rising flood period,the energy slope is steeper and the capacity of sediment transport is larger.As a result,the rate of bed load transport is increased.

关 键 词：河床质 推移质 级配 输沙率 

分 类 号：TV142[水利工程—水力学及河流动力学] TG142.2[一般工业技术—材料科学与工程]