基于EFDC的渤海冬夏季环流及其影响因素的数值模拟研究  

Numerical simulation of the winter and summer circulation and its driving factors in the Bohai Sea based on EFDC

作　　者：韩雅琼[1] 沈永明[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116024

出　　处：《水动力学研究与进展（A辑）》2013年第6期733-744,共12页Chinese Journal of Hydrodynamics

基　　金：国家重点基础研究发展计划项目(2013CB430403);国家自然科学基金项目(51279023;51179025)~~

摘　　要：该文基于环境水动力学数值模式EFDC,建立了渤海三维斜压模型。通过Lagrangian粒子追踪法对渤海冬季和夏季环流结构进行了研究,并进一步探讨了风、海表热通量、径流以及潮对环流结构的影响。该模型在潮位、潮流及温盐方面的模拟结果表明,模型能够较好地再现渤海的水动力及温盐特征。研究表明:渤海夏季环流的三维结构比冬季的更为明显;冬季与夏季在渤海中部、长兴岛海域及渤海湾口处有相似的环流结构;夏季环流强度要大于冬季;在冬季和夏季风生环流和热盐环流对渤海环流的贡献均大于潮的作用,冬季风生环流占优,夏季热盐环流占优;径流对渤海环流的影响仅体现在河口附近;研究拉格朗日环流仅考虑M2分潮的作用是不够的。Based on the Environmental Fluid Dynamics Code, a three-dimensional baroclinic model for the Bohai Sea was established. The structure of the winter and summer circulation and the effects of different factors, including wind, heat flux, river discharge and tides, were studied by Lagrangian particle tracing method. The simulated tides, tidal current and thermohaline field were well verified by observed data. The study showed that the 3-D structure of the Bohai Sea in summer was clearer than that in winter. Similar circulation structures were found in the middle of the Bohai Sea, around Changxing Island and in the mouth of the Bohai Bay during winter and summer. The circulation in summer was stronger than that in winter. The effects of wind and thermohaline were more obvious than that of tides both in winter and summer. However, wind-driven circulation played a more important role in winter and thermohaline circulation was more important in summer. River discharge merely affected the area near the estuaries. Only considering the M2 tidal constituent was not reasonable to study the Lagrangian circulation.

关 键 词：EFDC 渤海 Lagrangian粒子追踪 环流结构 三维斜压模型 

分 类 号：TV61[水利工程—水利水电工程]