中文摘要：

基于洋山港海域内长系列ADCP断面走航及定点的水文观测资料进行统计分析,讨论洋山港区在Ⅰ—Ⅲ期工程影响下海域内潮动力的变化及其对海床冲淤的影响。结果表明,由于小洋山—镬盖塘、大乌龟—颗珠山及将军帽—大指头岛三个汊道的封堵及填海,在北岛链以小洋山岛为基础形成一长方形陆域,且在陆域南沿形成一长约5.7km的顺直岸线。工程后由于潮流运动的底、侧边界发生改变,流场随之发生变化,突显潮波运动的非线性效应和科氏力效应,在以潮动力为绝对主要的水动力自然环境下：北港区潮流速随着工程的进行先剧减后又回增;工程后海域在涨、落潮流转流时段形成潮流弱环流;主通道北侧涨潮流增强,南侧落潮流增强。海床冲淤环境也随之改变,北港区前沿水域海床发生微冲,主通道西南海床则淤积,海域内的-10m等深线也东西向呈现波状移动。

英文摘要：

On the basis of statistic analysis of observational data from a series of ADCP cross-section as well as fixed-point in Yangshan Port,this thesis discusses the change of hydro-dynamic affected by Ⅰ-Ⅲ projects in Yangshan Port and its effect on the erosion and deposition of seabed. The results indicate that plugging and reclamation among Xiaoyangshan-Huogaitang,Dawugui-Kezhushan,Jiangjunmao-Dazhitoudao shape an approximate rectangular land based on Xiaoyangshan islands chain,and shape an approximate 5.7km straight coastline on its southern margin.As the bottom and side boundary conditions of tide movement change,the flow filed changes subsequently,enhancing the nonlinear effect and Coriolis force effect of tide movement.In the area where hydrodynamic environment is mainly controlled by dynamical tide,the tidal velocity turn significant reduction in the first and later returns with the project work.Tidal general circulation is formed during weak flowing time after the project,and the flood tidal velocity is enhanced in the north area of the sea and ebb tidal velocity decreased in the south.The silting and scouring environment changes subsequently,a slight scouring takes place in the north area and silting takes place in the southwest. The 10 meter depth contour in the sea also takes on undulance movement in the east-west direction.