남해 여자만의 조석 및 잔차류 모델링

Modeling of Tidal and Residual Currents in Yeoja Bay of the South Sea, Korea

This study simulated flow field of marine environment in Yeoja Bay of the South Sea, Korea. A three-dimensional hydrodynamic model with the fine grid was applied to simulate the barotropic tides, tidal currents, residual currents and salinity dispersions. Data inputs include hydrography, mean wind and land-based freshwater input, and tides. The model reproduced well the tidal currents distribution. The tidal residual current was relatively strong around mouth of Yeoja Bay with narrow channel, and many clockwise and anti-clockwise circulation due to depth and topographical characteristics in the study area were formed. The current had a maximum speed of 40 cm/s in the vicinity of the channel. The model showd that summer prevailing wind(SSW 3.6 m/s) somewhat increases north-eastward current and velocity, especially outer regions of Yeoja Bay. It was estimated that dispersions of low-saline water by freshwater discharge was very influence on the water quality, material fluxes and residence time of bay.