基于POM的大连湾溢油预测模型

基于POM建立了M2分潮的大连湾海域三维潮流场动力模式。利用此动力模式,以“油粒子”模型来模拟溢油在大连湾中的漂移扩散过程。通过欧拉一拉格朗日法,将油膜中心的轨迹和各个时刻的油膜分布情况可视化。溢油预测模型综合考虑了三维流场,湍流,风导输移和波浪破等环境因素,并包含了蒸发和乳化等风化过程。以大连湾溢油为例,预测了油膜在风和海流共同作用下漂移的路径和油膜影响的海域及海岸带范围,油膜靠岸后证明了动力溢油模型进行溢油预测的可行性。

Oil spill forecast model in Dalian bay based on POM

Considering the tidal current of M2, the model of 3D tidal flow based on POM in Dalian Bay is built. Combined with this model, the drifting and diffusion processes were simulated based on the particle approach. Using the Euler-Lagrange method, the track of centre of the oil slick and the temporal dispersion scope visualized. This oil-spill forecast model is used to supply 3-D flow field, turbulence, wind-driven transport and breaking waves as the environmental forcing of the behavior of oil-spill. Evaporation and emulsification processes are also included. A numerical experiment is carried out taking an oil spill in Dalian Bay for example. The prediction of the drift path and impact of the slick on the range in the coast is performed.The feasibility for the prediction of the drift of the slick by the dynamical model is demonstrated while the slick is pulled to the shore.