基于对数线性流速分布的含沙量垂线分布

Vertical distribution of sediment concentration based on log-linear velocity distribution

为解决河口海岸地区非恒定流条件下的流速剖面常偏离传统的对数流速分布问题,以对数线性流速分布为基础,推导出动量交换系数,并基于扩散理论得出含沙量垂线分布公式。利用长江口及杭州湾金山海域各层含沙量实测资料对含沙量垂线分布公式进行验证,结果表明,该公式不仅克服了Rouse公式表面水体含沙量为零的缺点,而且在整个水深上与实测含沙量吻合得更好,能够较好地反映河口海岸地区含沙量垂线分布特征。

In order to solve the problem of velocity profiles in estuarine and coastal areas often deviating from the distribution of sediment concentration not only overcomes the Rouse equation defect of the surface sediment concentration being zero, but also agrees with the measured sediment concentration along the vertical line, indicating that the equation objectively reflects the vertical distribution ride of sediment concentration in estuary and coastal areas.