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Seabed deposition and erosion change and influence factors in the Yangshan Deepwater Port over the years

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Abstract

The seabed scouring and silting are very important to the construction of port and waterway engineering. Seabed deposition and erosion change is complicated due to the influence of sediment supply, human activities and other factors. The Yangshan Deepwater Port is the new deep water harbor, which is an important part of the Shanghai International Ship** Service Center. Its construction has received much attention. At present, the water depth from the 1st to the 3rd harbor district is currently suitable under regular dredging and tidal current action. The fourth harbor district will be built in the world’s largest fully-automated deep water wharf. In the study, bathymetry change of the entire sea area of the Yangshan Deepwater Port and the 4th harbor district (i.e., Phase IV project) waters were analyzed quantitatively using multiyear bathymetric, hydrological and sediment data. The results show that from 1998 to 2010, seabed changes are characterized by large volumes of erosion and sedimentation, which the southern part was deposited and the northern part was eroded in the inner harbor waters, but the seabed of the Kezhushan inlet was eroded. Seabed changes of Phase IV project waters generally show a scour tendency in recent few years with the annual scour rate about 0.7 m. Among the many factors, the existence of Kezhushan inlet and its influence of the western water flow play an important positive role in water depth changes under the ebb tide action.

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Acknowledgements

Hydrological sediment materials were carried out with the help of Yangshan Tongsheng Port Construction Co. Ltd.

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Correspondence to Shuhua Zuo.

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Foundation item: The Fund of Tian** Research Institute of Water Transport Engineering of China under contract Nos TKS180101, TKS170202 and TKS150207; the National Natural Science Foundation of China under contract Nos 51509120 and 51779112; the Shanghai Science and Technology Committee under contract No. 15DZ1202300; the Tian** Science and Technology Plan Innovation Platform and Talent Special Fund Project under contract No. 16PTSYJC00190.

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Zuo, S., **e, H., Ying, X. et al. Seabed deposition and erosion change and influence factors in the Yangshan Deepwater Port over the years. Acta Oceanol. Sin. 38, 96–106 (2019). https://doi.org/10.1007/s13131-019-1461-5

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  • DOI: https://doi.org/10.1007/s13131-019-1461-5

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