洋山港海域现代沉积物运移趋势

地形、物源和水动力条件是洋山港海域现代沉积环境的主要控制因素，粉粒和粘粒是现代沉积物的主要组成部分，潮流是起动和搬运现代沉积物的主要动力，悬移是现代沉积物最主要的搬运方式，跃移是次要搬运方式，现代沉积物的起动和沉积过程交替频繁。研究区现代沉积物长期净运移趋势表明：研究区东部的黄泽洋向洋山港海域的输沙趋势显著；洋山港岛链峡道深槽的形成，系由峡道东部和西部的现代沉积物各向峡道两端分异运移所致；小洋山—唐脑山—线将是今后港区泥沙淤积的主要部位之一。

Transport Trends of Modern Sediments in the Yangshan Harbor Area

The modern sedimentary environment in the Yangshan Harbor sea area is mainly controlled by topography, material sources and hydrodynamics. Modern sediments consist mainly of silt and clay particles, and are transported primarily by suspension and secondarily by saltation. Moving and saltation processes of the modern sediments are alternated frequently. The long-term net transport trends of the modern sediments indicate that some sediments from Huangzeyang entered the Yangshan Harbor area, the deep trough of the channel was formed by the transport of sediments of the west and east parts of the channel towards its two ends respectively, and the area between Xiaoyangshan and Tangnaoshan is an convergent area of sediments, which will be an siltation area of the Yangshan Harbor in the future.