摘要
对大亚湾的潮流场进行三维数值模拟,分别用Lagrange质点追踪法和保守物质输运扩散2种方法研究大亚湾的水交换能力,并把大亚湾分成7个子区域,计算整个海湾和各子区域的水体平均存留时间和更新时间,比较各子区域的水交换能力的大小,分析2种方法结果差异产生的原因。大亚湾的水交换能力受潮致余流流场结构支配。质点追踪模拟结果显示,大亚湾南部及大鹏澳区域质点迁移出海湾的速度较快,哑铃湾、大亚湾北部及范和港区域较慢;保守物质输运扩散模型计算结果显示,大亚湾东南部水体的更新时间最快,水交换能力最强,其次分别为大亚湾中东部、西南部、范和港、大亚湾北部、大鹏澳、哑铃湾。
The tide and currents in Daya Bay was simulated by a 3D numerical estuarine and coastal ocean model. Lagrangian particle tracking and matter transportation and diffusion were applied in water exchange study. Daya Bay was divided into seven parts to calculate the averaged water residence time and refresh time in the whole bay as well as in each part. The structure of the tidal residual currents, as well as landform and depth play decisive roles in water exchange in Daya Bay. The result showed that the discharge of particles was faster in south of Daya Bay and Dapeng＇ao and slower in Yalin gulf, north of Daya Bay and Fanhe gulf as indicated by lagrangian particle tracking. Water refresh time was shorter in southeast of Daya Bay than in middle east, southwest of Daya Bay, Fanhe gulf, north of Daya Bay, Dapeng＇ao and Yalin gulf.
出处
《南方水产》
2008年第4期8-15,共8页
South China Fisheries Science
基金
国家高技术研究发展计划(863计划)重大项目(2006AA100303)
上海市教委重点基金项目(05ZZ51)
国家自然科学基金项目(30471332)
农业部渔业生态环境重点开放实验室开放基金项目(2006-4)
