Numerical modeling of tide and tidal current in the kangjin bay,south sea,Korea |
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| Authors: | Young Jae Ro Kwang Young Jung Woong Sik Jun Hyun Min Eom |
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| Institution: | (1) Department of Oceanography, College of Natural Sciences, Chungnam National University, 305-764 Taejon, Korea;(2) Dawoo Ocean Corporation, Daebang-dong 389-23 Dongjak-gu, 156-810 Seoul, Korea;(3) Technology R&D Institute, Hyein E&C Co. Ltd., Singil 7-dong 761, 150-854 Yeongdeungpo-gu, Seoul, Korea |
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| Abstract: | This study is based on a series of numerical modeling experiments to understand the tidal circulation in the Kangjin Bay (KB).
The tidal circulation in the KB is mostly controlled by the inflow from two channels, Noryang and Daebang which introduce
the open ocean water into the northern part of the KB with relatively strong tidal current, while in the southern part of
the KB, shallowest region of the entire study area, weak tidal current prevails. The model prediction of the sea level agrees
with observed records at skill scores exceeding 90 % in terms of the four major tidal constituents (M2, S2, K1, O1). However,
the skill scores for the tidal current show relatively lower values of 87, 99, 59, 23 for the semi-major axes of the constituents,
respectively. The tidal ellipse parameters in the KB are such that the semi-major axes of the ellipse for M2 range from 1.7
to 38.5 cm/s and those for S2 range from 0.5 to 14.4 cm/s. The orientations of the major-axes show parallel with the local
isobath. The eccentricity values at various grid points of ellipses for M2 and S2 are very low with 0.2 and 0.06 on the average,
respectively illustrating that the tidal current in the KB is strongly recti-linear. The magnitude of the tidal residual current
speed in the KB is on the order of a few cm/s and its distribution pattern is very complex. One of the most prominent features
is found to be the counter-clockwise eddy recirculation cell at the mouth of the Daebang Channel. |
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| Keywords: | numerical model tide ellipse parameter Kangjin Bay South Sea |
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