摘要
根据长江上游宽级配不连续床沙结构,概化为沙卵双峰泥沙。通过推移质输移特性水槽试验,体现了沙粒和卵粒的相互隐暴作用。对比分析了采用王兴奎公式和孙志林非均匀沙分级输沙率公式计算沙卵双峰泥沙输沙率的方法。在王兴奎公式的基础上引入考虑隐暴系数的水流参数来计算沙卵双峰泥沙输沙率,通过误差对比分析说明修正后的王兴奎公式计算结果与实验数据更加吻合。
The concept of sand-gravel bimodal bed load is obtained based on the wide distribution of non-sequence bed load in the upper reaches of the Changjiang River.Hiding and exposing action between sands and gravels was observed in flume experiments of bimodal sediment transport.Wang （2006） and Sun （1997） equations are selected as typical non-uniform sediment transport prediction methods and compared with experiment data.A hiding-exposing coefficient is introduced into Wang equation and the error analysis proves that the modified Wang equation is more suitable according to the flume experiment data.
出处
《泥沙研究》
CSCD
北大核心
2014年第3期64-70,共7页
Journal of Sediment Research
基金
"十二五"国家科技支撑计划资助项目"三峡水库变动回水区末端段航道治理研究"(2012BAB05B03)
重庆市科委自然科学基金资助项目"三峡库区卵砾石推移质输沙率研究"(CSTC 2011 JJA30002)
关键词
沙卵双峰型泥沙
推移质
输移特性
水槽试验
sand-gravel bimodal sediment
bed load
sediment transport characteristics
flume experiments
