关键词: 大长山岛海域, 人工鱼礁, 数值模拟, FVCOM, 水动力

Abstract: Based on the finite volume coastal ocean model (FVCOM) with an unstructured grid, a high-resolution hydrodynamic model was used to analyze the influence of the placement of artificial reefs on hydrodynamic characteristics in the coastal water of Dachangshan Island. Firstly, the measured tide levels and velocities were used to verify the accuracy of the current model, and the simulated results were in good agreement with field data, indicating that the model had high accuracy in hydrodynamic calculation. And then, 9 stations were selected to analyze the tidal velocities at the rising and falling times before and after the artificial reef. The results showed that the maximum changes of velocity in reefs area was 0.230 m/s at fastest flood tide before and after artificial reefs launch, the maximum changes of velocity in other areas was small at fastest flood tide. The release of artificial reefs would change the local tidal current field in the release area. The flow pattern in coastal waters far away from the artificial reefs area was not obviously affected by the reef.

Key words: Dachangshan Island waters, artificial reefs, numerical simulation, FVCOM, hydrodynamic