남해도 주변해역의 조석 및 조류특성

Tide and tidal currents around Namhae Island of the south sea, Korea

In order to estimate the tide and tidal current around Namhae Island in the South sea of Korea, tide and tidal current observations were carried out at five observational stations at the same time. Tides were measured at TD-1, TD-2 and TD-3 station which represent Kwangyang Bay, Noryang Strait and JinJu Bay around Namhae Island for about one month. We also moored current measuring systems at CR-1 ~ CR-5 station simultaneously to determine the change of tidal currents at the surrounding of Namhae Island in spring and neap tide. Semi-diurnal tides are dominant and their factors are 0.220~0.244 around Namhae Island. The phase of M2 tidal constituent is early first at Yeosu harbor and second at the Northern part of Kwangyang Bay(ST.TD-1) and last in Noryang Strait (ST.TD-2). Semi-diurnal tidal currents are dominant at CR-1~CR-4 but at CR-4, tidal currents are appeared as mixed currents( the tidal current factor is 0.70). Currents flow east at flood tide and flow west at ebb tide in Noryang Strait. The ebb flows stronger than the flood in the upper layer of Noryang Strait. However in the mid-layer of Noryang Strait the flood flows stronger than the ebb. The maximum speed of tidal current in Noryang Strait is 105.8cm/s at ebb during the period of the observation.