摘要
根据波浪作用下的泥沙悬浮机理,即影响泥沙悬浮的主要因素从近床面的紊动扩散逐渐过渡到自由表面的波动水质点周期运动,提出了全水深悬沙扩散系数的表达式,建立了悬沙垂向时均浓度分布的显式解析模型,并进一步讨论了参考含沙量和床面摩阻系数的合理取值。计算值与测量值的比较表明,该浓度分布模型与不同尺度的水槽实验数据吻合较好。
According to the mechanism of sediment suspension under waves, namely, the main reason of sediment suspension changes from the turbulent mixing near the boundary layer to the periodic motion of the water particle near the free water surface, the explicit expressions of sediment concentration distribution are presented in the whole depth of water. The appropriate reference concentration and bed friction factor are recommended. Comparisons between the calculated results and the measurements indicate that the results of the model agree well with the data from experiments and field.
出处
《泥沙研究》
CSCD
北大核心
2006年第5期63-68,共6页
Journal of Sediment Research
基金
国家自然科学基金资助项目(50279029)
关键词
悬沙浓度分布
波浪
扩散
distribution of suspended sediment concentration
wave
diffusion
