长波和水流作用下浮泥流动机理研究

基于宾汉模型,并运用量级分析方法建立了长波、水流作用下浮泥运动简化方程。简化后的浮泥运动方程是一个非线性的常微分方程。运用解析与数值混合的方法进行求解,计算量很小。讨论了水流对泥面的剪应力、波幅、波长、浮泥层厚度以及浮泥密度等多组参数对浮泥输运速度的影响。研究表明,存在波浪的情况下,即使水流对泥面的剪应力远小于浮泥屈服应力浮泥也能出现定向的输运。

Suspended Sediment Transport and Deposition in the Zhoushan Archipelago Sea Area

The transport mechanism and settlement characteristics of suspended sediments are analyzed in this article on the basis of measured data. Results indicate that the concentration and flux of suspended sediments decrease sharply from Hangzhou Bay to the offshore area. Suspended sediment transport is mainly controlled by advection transport and gravitational circulation transport. The settling velocity of suspended sediments gradually decreases from Hangzhou Bay to the offshore area. The settlement of suspended sediments mainly takes place during the turning phase of the tidal currents.