Research on the Impact of Ningbo Meishan Port Terminal Project on the Surrounding Submarine Topography

The changes in the surrounding seabed topography during ocean engineering construction are a key technical issue in the development and construction of coastal engineering, which is beneficial for the protection of the nearshore marine environment and the development and utilization of resources. This study analyzes the changes in the surrounding seabed topography before construction (2011), during construction period (2016, 2017), and after construction (2022) based on the measured seabed topography data of four voyages of the Ningbo Meishan Port Terminal Project from 2011 to 2022. Research has found that the actual survey area of the Meishan Port Terminal Project has a total of approximately 1.638 million cubic meters of sedimentation and 1.963 million cubic meters of erosion. After the erosion and sedimentation offset, the overall net erosion in the actual survey area is about 325000 cubic meters. Overall, when conducting artificial engineering in the surrounding sea area of the Ningbo Meishan Port Terminal Project, efforts should be made to avoid significantly changing the hydrodynamic conditions, which may affect the surrounding seabed topography and thus have adverse effects on the surrounding marine environment