秦皇岛近岸海域保守污染物漂移的数值模拟与分析  

Numerical simulation and analysis of conservative pollutant drift in offshore area of Qinhuangdao

作　　者：褚芹芹[1] 张万磊[1] 吴玲娟[2] 丁扬[3] CHU Qin-qin;ZHANG Wan-lei;WU Ling-juan;DING Yang(QHD Marine Environmental Central Station of SOA,Qinhuangdao 066002 China;North China Sea Branch of State Oceanic Administration,Qingdao 266100 China;Key Laboratory of Physical Oceanography(Ocean University of China),Ministry of Education,Qingdao 266100 China)

机构地区：[1]国家海洋局秦皇岛海洋环境监测中心站,河北秦皇岛066002 [2]国家海洋局北海预报中心,山东青岛266100 [3]中国海洋大学物理海洋教育部重点实验室,山东青岛266100

出　　处：《海洋预报》2019年第5期39-46,共8页Marine Forecasts

基　　金：国家自然科学基金（41430963）;国家海洋局北海分局海洋科技项目（2017B13）

摘　　要：采用FVCOM数值模型的水动力模拟结果为拉格朗日粒子追踪漂移模型提供背景潮流场,模拟了秦皇岛近岸7个河口保守污染物在风和潮流作用下的漂移轨迹,分析了两种作用对污染物在近岸运移轨迹的影响关系。结果表明:无风状态下,以金山嘴为界,金山嘴以南各河口粒子漂移距离相对较长,受到近岸潮流的影响,粒子运动轨迹与秦皇岛近岸流场走向相符;1级风力下,漂移轨迹顺着潮流的方向移动,漂移距离甚至会小于无风状态,尤其是1级风力下的NE风和NWN风;在2-3级风力下,风的去向即为粒子漂移的方向,风力越大漂移距离越远、漂移范围也越大。Based on the hydrological dynamics simulated by FVCOM model, a Lagrangian particle tracking drift model is conducted in this study to simulate the drift trajectory of conservative pollutant driven by wind and tide near seven estuaries of Qinhuangdao. The influence of wind and tide on the pollutant drifting trajectory is further analyzed. It is found that, the particles near the estuaries south of Jinshanzui shows a relatively long drift distance in the absence of wind. Affected by the near-shore tide currect, the particle drift trajectory is coincide with the direction of the near-shore flow field in Qinhuangdao. Under the conditions of wind scale 1, the drift trajectory moves along the direction of the tidal current. The drift distance could even be smaller than that under windless state, especially for the NE wind and NWN wind. Under the conditions of wind scale 2 and 3, the particles drift downwind, and the greater the wind speed, the greater the drift distance and range.

关 键 词：秦皇岛 保守污染物 FVCOM拉格朗日 粒子追踪 

分 类 号：X55[环境科学与工程—环境工程]