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A Proposal for Criterion of Sudden High Waves in the East Sea

동해에서 돌연고파의 기준 제안

  • Kim, In-Chul (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Oh, Jihee (Department of Civil and Environmental Engineering, Seoul National University) ;
  • Suh, Kyung-Duck (Department of Civil and Environmental Engineering, Seoul National University)
  • 김인철 (서울대학교 건설환경공학부) ;
  • 오지희 (서울대학교 건설환경공학부) ;
  • 서경덕 (서울대학교 건설환경공학부)
  • Received : 2016.02.19
  • Accepted : 2016.05.01
  • Published : 2016.06.30

Abstract

One of the major characteristics of the swell-like high waves, which occur in the East Sea mostly in winter with large height and long period, is its suddenness associated with the rapid development of high waves from a calm state of sea. To represent such suddenness, in this study, the term sudden high waves is introduced. To propose the criterion of sudden high waves, comparisons were made between the wave measurement data at Gangneung and Wangdolcho for eight years from 2005 and the record of marine accidents and property damage on the coast of Gangwon-do Province and Gyeongsangbuk-do Province during the same period. It was found that most of the accidents occurred when ${\Delta}(H^2L)/{\Delta}t$ was approximately greater than the top 20% or $88.6m^3/hr$, which is therefore proposed as the criterion of sudden high waves. The used variable represents the rate of increase of the wave energy in one wavelength, including not only height and period but also suddenness of high waves.

동해에서 주로 겨울철에 발생하며 파고가 크고 주기가 긴 너울성 고파의 주요 특성 중 하나는 잔잔한 상태에서 갑자기 파가 커지는 돌발성이다. 본 연구에서는 이러한 돌발성을 나타내기 위하여 돌연고파라는 용어를 도입하였다. 돌연고파의 기준을 제안하기 위하여 강릉과 왕돌초에서 2005년부터 8년간 관측된 파랑자료와 같은 기간동안 강원도와 경상북도 연안에서 발생했던 해상 사고 기록을 비교하였다. 그 결과 ${\Delta}(H^2L)/{\Delta}t$가 상위 20% 값인 $88.6m^3/hr$ 이상일 때 대부분의 사고 기록과 일치하는 것으로 나타나 이를 돌연고파의 기준으로 제안하였다. 사용된 변수는 한 파장당 파랑 에너지의 단위시간당 증가율을 나타내며, 고파의 파고 및 주기뿐만 아니라 돌발성도 포함한다.

Keywords

References

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Cited by

  1. A Study on Characteristics Analysis of Swell Wave Accidents and the Establishment of Countermeasures in the East Coast vol.30, pp.6, 2018, https://doi.org/10.9765/KSCOE.2018.30.6.235