• Journal of Korean Society of Coastal and Ocean Engineers
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• v.20 no.1
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• pp.14-24
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• 2008

Recently, rising tendency of high water level is detected at southwestern coast. The result of harmonic analysis shows increasing trend of mean sea level, decreasing trend of the amplitudes of semi-diurnal tidal constituents, and increase of Sa tidal constituent, therefore, additional increase of high water level at Summer season. It shows also that maximum surge level has increased greatly, according to the frequent visit of big typhoon such as RUSA and MAEMI. Considering the correspondence of Sa and typhoon period, namely July${\sim}$September, extraordinary high water level would be more probable. Especially, Mokpo and Jeju would be considered to have many chances of extraordinary high water level in the future.