Overview to Research on Engineering Sediment Problems of International Shipping Center of Shanghai Yangshan Deep Water Harbor

It is the features of deep water depth,rapid current,high sediment concentration and turbulent flow condition in Yangshan deep water harbor,and sediment siltation is the crucial problem.In this paper,the works and researches on sediment of Yangshan deep water harbor were summarized,and the measures of the research were introduced.It was induced the research results and the innovation points of the sediment research in Yangshan deep water harbor,evaluation was made for the science of the research results as well.It indicates that the sediment movement form is dominated by suspended load,and the tidal current has double functions of suspension and transportation to the sediment,which means that the current intensity is the key factor to maintain the depth.For the branches of Xiaoyangshan,Huogaitang and Xiaoyanjiao obstructed in 1st phase and 2nd phase projects,the parallel basin constructed is better than the excavated-in basin.The branch channel scheme for north harbor block is reliable,and the double channels for north and south scheme of single channel is suggested in the perspective plan.Based on the equilibrium sediment concentration theory,the prediction formulas of seabed evolution and sediment siltation for parallel basin are proposed.