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Statistical Characteristics of Hourly Tidal Levels around the Korean Peninsula

한반도 연안 1시간 조위자료의 통계적 특성

  • Ko, Dong Hui (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Jeong, Shin Taek (Department of Civil and Environmental Engineering, Wonkwang University) ;
  • Cho, Hongyeon (Marine Environments and Conservation Research Division, Korea Institute of Ocean Science and Technology)
  • 고동휘 (원광대학교 토목환경공학과) ;
  • 정신택 (원광대학교 토목환경공학과, 원광대학교 부설 공업기술개발연구소) ;
  • 조홍연 (한국해양과학기술원, 해양환경보전연구부)
  • Received : 2013.12.05
  • Accepted : 2013.12.23
  • Published : 2013.12.31

Abstract

Representative tidal gauging (TG) stations are selected to cover the tidal characteristics of the Korean peninsula coastal seas, and the statistical parameters of the data are analysed from the perspective of the probability distribution at that TG station. The shape of the distribution in the Incheon and Gunsan TG stations, which are tide-dominated areas, shows two clear modes at HWONT and LWONT in the distributions, and in the Mokpo station, shows an asymmetric double peak distribution. In contrast, the frequency distribution shape shows a smoothed flat peak in the Jeju, Yeosu and Busan TG stations, and a single peak in the Pohang and Sokcho TG stations. The emersion and submersion equations suggested as the 6-parameter Gaussian mixture models in this study are accurate, and well fitted to the observed tidal elevation data. The ${\mu}_1$, ${\mu}_2$ parameters are highly correlated to the LWONT and HWONT, and the ${\sigma}_1$ and ${\sigma}_2$ parameters are also closely correlated to the mean tidal range. The ${\mu}_1$ and ${\mu}_2$ parameters coincide with the modes of the suggested probability distribution of the hourly tidal level data.

한반도 연안 주요 조위관측소 조위자료를 선정하여 확률분포 측면에서 분석을 수행함으로써 조위 특성 및 통계적인 매개변수들을 분석하였다. 조석현상이 우세한 인천과 군산 자료의 조위확률 분포는 HWONT와 LWONT에서 2개의 대칭형 첨두형태를 보이고, 목포 자료의 경우 비대칭형 첨두형태를 보이고 있다. 반면에 제주, 여수, 부산 자료의 경우 편평한 첨두형태를 보이고, 포항, 속초 자료의 경우 1개의 첨두형태를 보이고 있다. 본 연구에서 노출과 침수 관계식으로 제안한 6개의 매개변수를 가진 가우스 혼합분포 모형은 정확하고, 관측결과와도 잘 일치하고 있다. ${\mu}_1$, ${\mu}_2$ 매개변수는 LWONT, HWONT와 ${\sigma}_1$, ${\sigma}_2$ 매개변수는 평균조차와 밀접하다. ${\mu}_1$, ${\mu}_2$는 제안한 확률분포의 최빈값에 해당한다.

Keywords

References

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