Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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The Typhoon Surges in the Southern Coast of Korea by Typhoon Brenda

태풍 Brenda에 의한 한국 남해안의 해일

  • LEE In-Cheol (Department of Ocean Engineering, National Fisheries University of Pusan) ;
  • KIM Jong-Kyu (Department of Ocean Engineering, National Fisheries University of Pusan) ;
  • CHANG Sun-duck (Department of Ocean Engineering, National Fisheries University of Pusan)
  • 이인철 (부산수산대학교 해양공학과) ;
  • 김종규 (부산수산대학교 해양공학과) ;
  • 장선덕 (부산수산대학교 해양공학과)
  • Published : 1994.09.01
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Abstract

The storm surges caused by the typhoon Brenda in 1985 were studied by analysing tidal observation data at 7 stations along the south coast of the Korean peninsula. The tidal deviation at these stations along the coast are discussed in association with meteorological data. The sea level anomalies were studied by means of the Empirical Orthogonal Function (EOF) analysis and the Fast Fourier Transform(FFT) method. From the result of EOF analysis, the temporal and spatial variations of storm surge were described by the first mode of EOF, which is $73\%$ of the total variances during the passage of typhoon Brenda. From the results of FFT spectral analysis, the peak energy of the autospectrum for surge, atmospheric pressure, and wind stress appeared in the low frequency fluctuations band. The result of FFT analysis showed that the typhoon surge was related chiefly to the atmospheric pressure change in an open bay such as Cheju and Keomundo harbor, while it was influenced mainly by the wind stress in the semi-enclosed waters of Yeosu, Chungmu and Kadukdo.

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