论文部分内容阅读
利用MIKE21 HD水动力模块对福建东吾洋附近海域进行潮流数值模拟,通过与实测资料对比,对模型计算的潮位、流速及流向进行验证。验证结果显示,数模结果与实测值吻合较好,该潮流数值模型可以反映当地水动力情况,并作为溢油模块的水动力基础数据。基于欧拉-拉格朗日“油粒子”理论,考虑油膜运动过程中扩散、漂移、风化等过程,建立了东吾洋关门渔港邻近海域二维溢油扩散模型,模拟不同潮时(涨憩、涨急、落憩及落急)发生溢油,考虑不同风况(静风、夏季盛行风及冬季盛行风),分析不同情况下的溢油油膜漂移路径、漂移路程及扫海面积。结果表明,关门渔港附近溢油漂移扩散主要受潮流和风场影响,其中风场起主导作用。24 h内油膜最大扫海面积及漂移路程均出现在落憩静风时溢油,分别为6.66km~2及17.63 km。除落憩冬季风情况下溢油外,其余各情况溢油均在关门水道附近随潮流来回移动,最终到达东安岛西南侧弥勒湾内。
Using MIKE21 HD hydrodynamic module, the tidal current numerical simulation is carried out in the waters near East Iwu, Fujian Province. Compared with the measured data, the tide position, velocity and flow direction of the model are verified. The verification results show that the numerical results are in good agreement with the measured values, and the tidal current numerical model can reflect the local hydrodynamic conditions and serve as the hydrodynamic basis for the oil spill module. Based on the Euler-Lagrange “oil particle ” theory, the two-dimensional oil spill diffusion model was established in the offshore waters near the fishing port of Guandu, East China Sea, considering the diffusion, drift and weathering during the oil film movement. (Including static wind, prevailing wind in summer and prevailing wind in winter), analyzing the drift path, drift distance and sea sweeping area of oil spill under different conditions . The results show that the oil spill drift and dispersion near Guanmen Fishing Port is mainly affected by the tide and wind field, and the wind farm plays a leading role. Within 24 h, the maximum sweep area and drifting distance of the oil film all occurred during the resting quiet wind with oil spills of 6.66 km 2 and 17.63 km, respectively. Except for the oil spill during the winter storm, the rest of the oil spill moves back and forth along the tidal stream near the water gate and eventually reaches the Maitreya Bay on the southwestern side of Dong An Island.