长江口南支太仓段溢油事故数值模拟研究与应用

Numerical Simulation Research and Application of Oil Spill Accident in Taicang Section of the South Branch of the Yangtze River Estuary

随着长三角经济带的快速发展,太仓港已成为最繁忙的港口之一,突发环境风险事故发生率上升。本文针对长江太仓段溢油事故发生特点,采用二维非稳态-油粒子耦合模型模拟评价区域水动力流场及溢油追踪扩展过程,较好地模拟了长江太仓段水流流场和溢油事故发生时的迁移和扩散过程。模拟结果表明,溢油事故在大潮落潮时刻开始进入长江,事故发生后86 min和90 min分别到达浏河一级保护区和浏河二级保护区,将对长江太仓浏河饮用水水源保护区造成直接影响。该模型应用于长江口南支太仓段船舶溢油的事故分析中,预测响应灵敏,效果理想,可为长江口南支太仓段突发性溢油事故预警和应急处理决策提供借鉴。

With the rapid development of the Yangtze River Delta Economic Belt,Taicang Port has become one of the busiest ports,and the incidence of sudden environmental risk accidents has increased.Aiming at the characteristics of the oil spill accident in the Taicang section of the Yangtze River,this paper uses a two-dimensional unsteady state-oil particle coupling model to simulate the hydrodynamic flow field and the oil spill tracing process in the evaluation area,which simulates the flow field of the Taicang section of the Yangtze River and the migration and diffusion process of the oil spill.The simulation results show that the oil spill accident begins to enter the Yangtze River at the time of low tide,and reaches the Liuhe Class 1 Protection Area 86 min after the accident and Liuhe Class 2 Protection Area 90 min after the accident,which will have a direct impact on the Taicang Liuhe Drinking Water Source Protection Zone of Yangtze River.This model is applied to the accident analysis of ship oil spill in the Taicang section of the south branch of the Yangtze River estuary,the predictive response is sensitive and the effect is ideal,which can provide a reference for the early warning and emergency response decision-making of sudden oil spill accidents in the Taicang section of the south branch of the Yangtze River estuary.