Modelling of Tide and Tidal Currents in the South-Eastern Coastal waters of Korea

摘要

To explain and simulate the coastal circulation, it is necessary to develop the three dimensional ocean circulation model in the south-eastern coastal water of Korea. The open boundary conditions are evaluated from the tidal observation data obtained from the open boundary. This model represented well the flow pattern through the tidal phase. Especially, it showed that the reversing time of tidal currents in the surface level are delayed for about half an hour with respect to the bottom. This phase lag between the surface and the bottom is considered to be attributed to the inertial force of the flow in coastal waters. The response of tidal currents against the effect of wind in summer and winter is also investigated. Based on the investigation, the tidal currents are accelerated with the corresponding components of wind direction and are decelerated with the opposite direction. Also, the flow pattern of the bottom level showed a compensative flow, which is an important mechanism of vertical circulation in coastal waters.