杭州湾北岸高能潮滩的基本特征

BASIC CHARACTERISTICS OF THE TIDAL FLAT ON THE NORTH COAST OF HANGZHOU BAY

根据纵向泥沙输移中的能量变化,潮滩可分为侵蚀、堆积和稳定三种类型,杭州湾由于北岸潮滩冲淤变化较小,属于基本稳定岸滩。

Tidal flat is located on the north coast of Hangzhou Bay, running from Nanhui Point in the east to Ganpu in the west. It was formed under the dynamic actions of large tidal current and high velocity waves.Sediments on the north coast of Hangzhou Bay come mainly from the Changjiang estuary Longitudidal transport of sediments along the coast is restricted by the effect of boundary conditions, changing the flat alternatively through erosion and accumulation. The sediment traverses diffusion in the formation processes of flat profile. So the sediments are being transported toward the banks. The grain size distribution of sediment coast is generally from corase to fine. The tidal flat on the north of Hangzhou Bay is in general a product of longitude and traverse motions of sediments.