238 / 2024-02-28 14:35:27

Evolution of hydrodynamic environment under the construction of Yangshan Deepwater Harbor ,China

Yangshan Deepwater Harbor,FVCOM,tide,tidal current

The construction of Yangshan Deepwater Harbor has blocked several channels in the Yangshan sea area, significantly altering the local boundary conditions, which can lead to changes in the tidal dynamics of the Yangshan sea area. In this study, a high-resolution hydrodynamic numerical model of the Yangshan sea area is established using the Finite Volume Coastal Ocean Model(FVCOM) to investigate the impact of different stages of harbor construction on the hydrodynamics of the sea area. Firstly through the harmonic analysis of the tide level of 8 typical stations, it is found that the tidal skewness has changed. Secondly, the tidal current intensity and spatial distribution have also changed significantly. Specifically, the implementation of the project leads to a convergence of the ebb and flood main streams within the main channel, resulting in a decrease in their intensity compared to the natural state. By calculating the dominant flow, an analysis of the overall flow pattern in the Yangshan sea area is conducted. The distribution of the dominant flow exhibits a east-to-west and north-to-south gradient, with higher values in the east and north, and lower values in the west and south. Furthermore, the project plays a crucial role in guiding and converging the flood currents, as evidenced by the changes in the dominant flow pattern that align with the alterations observed in the ebb and flood main streams. Overall, this study provides valuable insights into the effects of port construction on the tidal dynamics of the Yangshan sea area, contributing to a better understanding of the local boundary conditions and their implications for future coastal management and engineering projects.