伶仃洋低频水流与水沙纵向输运

Low Passed Current and Suspend Sediment Fluxes in the Lingding Estuary

在分析实测资料（１９７８～１９７９）的基础上，运用物质纵向输移模式讨论了伶仃洋河口湾余流的垂向结构，同时，对同步资料进行低通滤波处理，得到垂向低频水流分布．结果表明，两种分析方法对伶仃洋河口环流与水沙输移的解释基本一致，东、西两槽均存在明显的垂向环流，平均流、斯托克斯漂移效应、以及垂向净环流是净输沙的主要贡献项。

Based on measured data,, this paper uses the model of longitudinal material fluxes to analyze the vertical profiles of Eulerian , Stokes and Lagrange residual current .At the same time, these synchronous data are treated with a low passed filter,and the vertical distributions of low passed currents are obtained. The calculated results show the explanations for the estuarine circulation and the material fluxes in the Lingding Estuary are basically the same. There exist vertical circulations which are mainly formed by the upper layer of fluids and the lower layer flow compensated ho the high salinity, in East Channel and west Channel in the Lingding Estuary. Distributions to the net suspended sediment transport are mainly steady advection,mass Stokes drift, and vertical net circulation.