Author(s): Sun-Duck Chang; Jong-Sup Lee; In-Cheol Lee
Linked Author(s): Jong-Sup Lee, Sun-duck Chang
Keywords: No Keywords
Abstract: A numerical experiment of sea level anomaly was carried out to hindcast the storm surge in the coastal waters of Pusan, Korea. Barometric effect and wind speed are computed and are taken into account in the numerical model. The characteristics of storm surge at Pusan during the typhoon Thelma in 1987 were studied by the Fast Fourier Transform method. The anomalous sea level deviations of the observed tide caused by the typhoon Thelma at six stations in the southern sea of Korea are investigated in association with the meteorological data. The result of the numerical computation of storm surge around Pusan shows that the maximum surge which is higher than 200 cm occurred at the estuarine region of the Nakdong River, where is a semi-enclosed shallow bay with aboundant run-off, whereas it is about 56 cm in open waters. The result of FFT analysis shows that the typhoon surge is related chiefly to the atmospheric pressure change in an open bay such as Cheju and Keomundo harbor while it is influenced mainly by the wind stress in the semi-enclosed waters of Yeosu, Chungmu and Kadukdo. The variation of storm surge at Cheju and Keomundo harbor indicated a bi-modal peak during the passage of typhoon Thelma.
Year: 1993