A three-dimensional numerical model FVCOM is applied and model results indicate obvious difference in the vertical direction of the current field in the Yangshan Port area.(1)In the Kezhu Hill waterway, flood current concentrates at the Kezhu Hill side, while the ebb current distributes more evenly, as far as the surface current is concerned, the bottom current is slightly anti-clockwise drift compared to the surface flow field.(2)In the port front area, residual current results show that ebb current dominates, especially at both sides, but at the east mouth, flood current of the bottom layer at left side shows its dominance, which makes aggregation and segregation of residual current locally.


The Yangshan deep-water port, situated at the area of Qiqu Archipelago, is 30km southeast from Luchaogang, the southeast point of Shanghai mainland. The Qiqu Archipelago contains two island chain south and north which separately dominated by Dayangshan and Xiaoyangshan. There are 69 islands distribute in this sea area with about 10.72 km2 area. Between the two island chain is the port front domain, which seems narrow at east and wide at west. The east mouth (Dayangshan to Xiaojiaoyan) is about 1km wide while the west mouth (Dawugui to Xiaojiaoyan) is about 7.5km wide, The inner area is about 20km2. Nowadays, a grand scale deep water port has been constructed on the Xiaoyangshan island chain (shadows in Fig. 1), several big branches between islands in Xiaoyangshan chain have been blocked through reclamation works to build great amount of areas for docks simultaneously. A bridge and a sea dike road which connect the island Kezhushan with Janggongzhu in the south and Dawugui in the north, since then, the Xiaoyangshan chain as a whole can be linked to Shanghai mainland through the East Sea Bridge, a 38 km long cross-sea bridge

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