Abstract
A two-dimensional hydrodynamic mathematical model of the sea area near the Qitou sea area was established by using MIKE21 hydrodynamic module, and the tidal level, flow velocity and direction simulated by the hydrodynamic model were verified according to the measured data. Based on MIKE21 hydrodynamic model and particle tracking module, a mathematical model of oil spill diffusion centered on the sea area of Qitou was established, and the influence range of oil spill under six different working conditions and the time of oil spill reaching the main sensitive area near The sea area of Qitou were simulated. The analysis shows that tidal current and wind are the main factors affecting the diffusion process of oil spill in The Qitou sea. The calculation results show the influence area of oil spill 24 hours after the occurrence of the accident and the time when the oil spill reaches the main sensitive area in The sea area of Qitou, which has a certain guiding role in dealing with the offshore oil spill pollution and formulating the emergency treatment plan of oil spill accident in the sea area of Qitou.
Highlights
The Qitou sea area is located in the northeastern part of Zhejiang Province, surrounded by Chuanshan Peninsula in the south, Chuanbi Island in the west, Ant Island in the east, Meishan Island in the southwest, and Xiaogan Island in the northeast
Based on the MIKE 21 module, Qi Qinghui et al established an oil spill model for the northern section of the Beijing-Hangzhou Canal and predicted the diffusion of oil particles after the oil spill accident[15].Wu Fanjie et al established a threedimensional hydrodynamic model to simulate the spread of oil spill in the Xiangshan Port sea area, and pointed out that tidal current is the main factor affecting the trajectory of oil spill, and wind conditions are an important factor affecting the area of oil spilled oil film[16]
Hydrodynamic module (HD) and particle tracking module (PT) in MIKE 21 developed by DHI were used to establish the mathematical model of oil spill diffusion in the Qitou sea area
Summary
The Qitou sea area is located in the northeastern part of Zhejiang Province, surrounded by Chuanshan Peninsula in the south, Chuanbi Island in the west, Ant Island in the east, Meishan Island in the southwest, and Xiaogan Island in the northeast. It is an important aquaculture area, tourism development zone and biological nature reserve in Zhejiang Province. The oil spill model is mainly used to obtain the corresponding flow field data through the hydrodynamic model, and coupled various influencing factors affecting the oil film drift, so as to simulate the migration and diffusion process of oil spill accidents
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