摘要
在MIKE21 HD水动力模型验证的基础上,采用拉格朗日“油粒子”模型,对大丰港北部海域不同条件下的溢油漂移扩散情况进行数值模拟。模型油粒子数通过探讨其对模拟效果及模拟时间的影响而确定。结果表明:油粒子数对油膜扫海面积、最大厚度范围有一定影响,其取值增加也会导致模拟时间明显增加,当其达到100000个(即单个油粒子质量为7.2 kg)后,油膜扫海面积、最大厚度范围均趋于稳定;常风向下发生溢油后油膜扫海区域分布于近岸,而不利风向WNW、涨潮初期发生溢油后油膜扫海区域则由近岸向东侧外海延伸;溢油影响的生态敏感目标主要包括江苏盐城湿地珍禽国家级自然保护区、东沙泥螺四角蛤种质资源保护区及盐城梭子蟹、梅童鱼保护区等,其中油膜抵达江苏盐城湿地珍禽国家级自然保护区的时间在3 h内。模拟结果对大丰港北部海域溢油事故预报及应急措施制定具有一定的指导意义。
Based on the verification of the MIKE21 hydrodynamic model,the Lagrangian′oil particle′model was applied to simulate the oil spill drift and diffusion in the northern sea area of Dafeng Port under different conditions.The number of oil particles in this model was determined by exploring its impact on the simulation effect and simulation time.The analysis results show that the oil particle number has a certain impact on the sweeping area and the maximum thickness range of oil slick,and an increase in its value leads to a significant increase in simulation time.The sweeping area and the maximum thickness range of oil slick tend to stabilize when it reaches 100000(the mass of a single oil particle is 7.2 kg).The sweeping area is distributed near the coast when oil spills occur during the prevailing wind,while the sweeping area extends from the nearshore to the eastern open sea when oil spills occur during the unfavorable WNW wind at the beginning of the flood tide.The affected ecological sensitive targets mainly include Yancheng National Nature Reserve,Dongsha Germplasm Resource Reserve,Yancheng Swimming Crab and Baby Croaker Reserve among others.The time for the oil slick to arrive at Yancheng National Nature Reserve is within 3 hours.The simulation results have certain guiding significance for the prediction of oil spill accidents and the formulation of emergency measures in the northern sea area of Dafeng Port.
作者
戴路
王盈心
李春辉
陈鹏
DAI Lu;WANG Yingxin;LI Chunhui;CHEN Peng(Jiangsu Zhongxin Safety Environment Technology Co.Ltd.,Nanjing 210000,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China;Environmental Technology Development of TIWTE(Tianjin)Co.Ltd.,Tianjin 300456,China;School of Marine Sciences,Nanjing University of Information Science&Technology,Nanjing 210000,China;Pearl River Hydrology and Water Resources Survey Center,Guangzhou 510610,China)
出处
《水道港口》
2025年第4期627-634,共8页
Journal of Waterway and Harbor
基金
国家自然科学基金重点项目(42130405)。
关键词
水动力模型
溢油模拟
油粒子数
生态敏感目标
溢油扩散
hydrodynamic model
oil spill simulation
oil particle number
ecological sensitive targets
oil spill diffusion
