渤海为内陆海湾,仅以一海峡与北黄海相通。天体引力作用下的周期性海水运动是渤海海水运动的主要形式之一。因此,研究渤海潮流对污染物稀释扩散,迁移输送的规律是环境保护研究工作中的重要课题。渤海是以半日分潮性质为主的海域。因此本文着重讨论渤海半日分潮的数值模拟问题,以便在此基础上求解扩散方程式,进而得到污染物在主要半日分潮流作用下的空间分布状况。 The Bohai Sea is an inland bay, with only one channel connecting the northern Yellow Sea. Cyclical seawater movement under celestial gravity is one of the main forms of seawater movement in the Bohai Sea. Therefore, it is an important issue in the research of environmental protection to study the trend of the Bohai Sea tidal current for the dilution and diffusion of pollutants and the transportation and transport. The Bohai Sea is dominated by the semi-diurnal waters. Therefore, this paper focuses on numerical simulation of semi-diurnal tide in the Bohai Sea, in order to solve the diffusion equation on the basis of this, and then obtain the spatial distribution of pollutants under the action of the main semi-diurnal tidal current.