Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Analysis of Generation and Amplification Mechanism of Abnormal Waves Occurred along the West Coast of Korea

서해안 이상파랑의 발생 및 증폭 기구 분석

  • Yoon, Sung Bum (Dept. of Civil, Env. and Plant Engrg, ERICA Campus, Hanyang University) ;
  • Shin, Choong Hun (Dept. of Civil & Env. Engrg, Graduate School, Hanyang University) ;
  • Bae, Jae Seok (Industry-University Cooperation Foundation, ERICA Campus, Hanyang University)
  • 윤성범 (한양대학교 건설환경플랜트공학과) ;
  • 신충훈 (한양대학교 건설환경공학과) ;
  • 배재석 (한양대학교 산학협력단)
  • Received : 2014.10.13
  • Accepted : 2014.10.27
  • Published : 2014.10.31
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Abstract

On 31 March 2007, the abnormal wave occurred along the western coast of Korea. In order to investigate the generation mechanism of abnormal waves and to understand the amplification process of the abnormal waves, the observed data were analyzed and one-dimensional numerical model experiments were performed by using both the linear shallow water equation and the linear Boussinesq equation models. Various types of pressure jump for the abnormal waves previously proposed by other researchers were reviewed. As a result, it was not possible to reproduce the abnormal waves from the previously proposed pressure jumps. In this study, we proposed a new form of pressure jump, and numerical simulations were performed in order to check the validity of the proposed pressure jump. The numerical results showed that the calculated period of abnormal waves and the maximum water elevations agreed reasonably well with those of the observations.

2007년 3월 31일 서해안에서 발생했던 이상파랑의 발생원인 및 증폭과정을 이해하기 위해 관측자료 분석과 선형 천수방정식 및 선형 Boussinesq 모형을 이용한 1차원 수치모형 실험을 수행하였다. 기존의 연구에서 제안된 여러 형태의 압력점프에 대해 검토한 결과 기존의 압력점프는 관측된 이상파랑의 특성을 제대로 재현할 수 없었다. 본 연구에서는 새로운 형태의 압력점프를 제안하였다. 본 연구에서 제안한 압력점프의 타당성을 검토하기 위한 수치모의를 수행한 결과, 계산된 이상파랑의 주기와 최대 수면고가 관측치와 상당히 일치함을 보여주었다.

Keywords

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