Tidal dynamics of Yangshan Harbor sea area and its response to the project

As the first offshore-port in China, the Yangshan Deep Water Port was set up along the Xiaoyangshan island chain, locating about 32 km away from the mainland of Shanghai. The port is shaped by three main fork channel closures and throw-filling land-making projects. The topography of this area was changed strongly by the large-scale man-made landform projects, which led to the response of tidal dynamics of Yangshan Harbor sea area. According to the observation data of tidal level and tidal flow before and after the project, we found the main tidal dynamics in Yangshan Harbor sea area are as follows. The amplitude of over-tide and compound tide are strengthened due to the project, showing a distinct non-linear effect. Backwater phenomena occurs in the central part of this sea area. The tidal wave shows that standing waves near the landline area cause a weak tidal circulation in the slack tidal period.