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Abstract

Based on a two-dimensional tidal current mathematical model, this study used the oil particle method to establish an oil spill model in the Quanzhou Bay area to simulate the oil film drift path and degree of impact after the oil spill under various tidal conditions, i.e., the maximum flood, spring tide, maximum ebb and low tide in a tidal cycle under conditions of calm wind, the prevailing northeasterly wind in winter and the prevailing southwesterly wind in summer. The simulation results indicate that the drift trajectory of oil film in the Quanzhou Bay area was primarily influenced by the position of the oil spill point, wind conditions and tide when the oil spill occurred: marine areas of approximately 40-117 km2 , 18-117 km2 , and 51-159 km2 were affected by the oil film in 12 hours in a NE wind-driven current in winter, a SW wind-driven current in summer, and calm wind conditions, respectively. This study provides the scope and degree of influence of possible oil spill accidents in the Quanzhou Bay area and the time intervals between when an oil spill occurs and when sensitive targets become affected. This work offers scientific support for decision making and environmental damage assessment for oil spill emergencies, as well as useful exploration criteria for the accurate simulation of oil spill diffusion at sea.

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