Author(s): Ken Tm Wong; Qian Zhao; Yanbin Xi; Junting Fan; Chao Zhou; Qinghua Ye; Ken Kt Tsui; Alex Yw Chiu; Sunny Wc Sun; Ron R Yang; Samuel Hk Chui

Linked Author(s):

Keywords: Delft3D Flexible Mesh; Hydrodynamic modelling; Marine environmental incidents; Oil spill modelling; Palm stearin; Unstructured grid

Abstract: To enhance the capability of Hong Kong and coastal cities in the Greater Bay Area of China (GBA) in handling potential marine environmental incidents, such as oil spills, associated with the region’s continuous development into an international trading hub, a particle model for spillage simulation was developed based on the novel Delft3D Flexible Mesh (DFM) technology. With this new technology, the model coverage is significantly extended to the continental shelf in the South China Sea, without compromising the spatial resolution in our coastal waters. The model was applied to hindcast two spillage incidents, in the winter of 2004 and in the summer of 2017. It can be concluded from the model results that the distinct ocean current and monsoon wind conditions in the two seasons are the primary factors driving the spillage pathway. Weathering processes such as evaporation and emulsification are additive factors that can alter the fine details of movement. Together with the help of field observations and satellite remote sensing to narrow down the uncertainties, the model provides a useful tool for simulating the water movement and the trajectory of chemical spills after environmental incidents, enhancing the authorities’ capability and preparedness in handling environmental incidents more effectively.

DOI: https://doi.org/10.64697/HIC2024_P318

Year: 2024