A Study on the Numerical Calculation for Shallow Water Waves Considering the Wind Direction Characteristics of Typhoon

J. Ocean Eng. Technol. 2007;21(1):1-6.

Lee, Kyung-Seon;Kim, Jung-Tae;Ryu, Cheong-Ro;

Department of Ocean Engineering, Pukyong National University;Department of Ocean Engineering, Pukyong National University;Department of Ocean Engineering, Pukyong National University;

태풍의 풍향특성을 고려한 천해파 산정에 관한 연구

이경선;김정태;류청로;

부경대학교 해양공학과;부경대학교 해양공학과;부경대학교 해양공학과;

Keywords: Typhoon, Wind speed, Shallow water wave, Numerical wave simulation

핵심용어: 태풍, 풍속, 천해파랑, 파랑수치모형실험

Abstract

While a typhoon is traveling, characteristics of its wind fields are continuously changing, producing severe changes in local water level and wave conditions, especially, when a typhoon comes into shallow water. However, there have not been many studies related to local typhoon effects, especially, considering real time changes of wind direction related to the coastal topography. In the study, the characteristics of the wind field by typhoon and topographical characteristics in shallow water are considered, as well as conditions of wave climate estimation. These are performed by the SWAN (Simulating waves nearshore) model, in order to estimate the growth of wave energy due to the wind field. It can be strongly suggested that the wave energy of theof an inner bay should be estimated when the direction of the bay entrance and the wind direction of the typhoon are identical. The result of the numerical calculations is in better agreement with the observed data than the result of the conventional estimation techniques.