Analysis Of Sediment Transport Under Tidal Dynamics And Tidal Action In Haihe River Estuary

Estuary, the end of river, is the sea land interaction zones and the transient of river and ocean. Owing to its significant position and special environment, there are many records related to estuary as early as the 5th Century BC in ancient Greece .There are numerous estuaries in China, and its types are complex. To develop and control estuaries, many systematic observations, investigations and researches on the estuaries of Yangtze River, Yellow River, Pearl River and Qiantang River haven been done since 1950. Sediment movement is one kind of most significant natural phenomenon in estuary area and can lead to many problems such as beach erosion, sedimentation, coastline deformation, sedimentation in port channels, bottom erosion of port buildings. And these problems must be considered and resolved in coastal engineering, hydraulic engineering, port and channel engineering etc. Sediment movement must be considered and understood when human engage in resources development and production activity such as building ports, excavating channels, constructing breakwaters, reclamation project and erecting bridge.The study on sediment has become a significant science and the application of sediment mathematical model with high efficiency, high stability and high precision can provide better theoretical guidance and technical support for engineering construction.This paper is based on the sediment movement theory under estuary tide dynamic force and tide action, and further studies are done on the characteristics of estuarine tidal stencils, sediment and river-bed development. And then, the tidal current motion in port-neighboring industry area near Tianjin Port. Hope to develop and protect estuary in a better degree, and promote man-land relationship to the direction that beneficial to social life and production practice of human beings.