The Study Of Erosion And Siltation Of The Coast Of Tianjin

By Remote Sensing interpretation and analyzing the field investation of land reclamation district ,the article discussed the changing law of the coast line of Tianjin, studied the regularity of erosion and siltation of the Port Industrial Zone .What's more, it will give correct guidling of reclaim land project and Shen silt impact of the main channel of Tianjin Port ,thus providing valuable experience for land reclamation of Muddy coastSince 6000 years ago, after the Bohai Sea coast outline formed, the coastline was mainly silt into the state. Especially in the period from 3000 years ago to 50's of the 20th century, by carrying a massive amount of sediment, rivers made the coastline of low-plain relocation move out rapidly, forming the coastal plain now. After the 1950s, shoreline erosion and deposition trend reversed, and most natural coastline was in erosion or stability. After the 1980s, with rapid economic development of the coastal zone and more attention to the Binhai New Area, anthropogenic land reclamation activities are developing rapidly, therefore advancing to the sea coast and the natural variation both take control of the shoreline erosion and deposition environment.On the basic of the correct analysis of the historical changes and coastal tidal, longshore currents, sediment migration impact, the article determined the type of Tianjin Marine and analysed of the laws and formation mechanism of Tianjin Coastal erosion and siltation.With the rapid development of world's Coastal Zone, as a northern economic center, Tianjin is in full swing in Coastal development. The construction on the Muddy Coast, such as Tianjin Port and Lingang Industrial Zone (Reclamation) is all involved the coastal erosion and siltation problems that call for urgent solutions.Through field investigation of carrying capacity and sedimentation of tides near Tianjin Port, we certified the correctness of the results of the previous two-dimensional tidal current mathematical model, proved that construction of Lingang Industrial Zone have little impact on the main channel of Tianjin Port in erosion and siltation. Extensive siltation was caused to the south of Lingang Industrial Zone.Although there is some experience in many regions at home and abroad in this regard, this article has great practical significance in Tianjin Coastal reclamation project.