Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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Correcting the Sound Velocity of the Sediments in the Southwestern Part of the East Sea, Korea

동해 남서해역 퇴적물의 음파전달속도 보정

  • Kim, Sora (Department of Energy Resource Engineering, Pukyong National University) ;
  • Kim, Daechoul (Department of Energy Resource Engineering, Pukyong National University) ;
  • Lee, Gwang-Soo (Department of Petroleum and Marine Resources, Korea Institute of Geoscience and Mineral Resources)
  • 김소라 (부경대학교 에너지자원공학과) ;
  • 김대철 (부경대학교 에너지자원공학과) ;
  • 이광수 (한국지질자원연구원 석유해저연구본부)
  • Received : 2016.10.17
  • Accepted : 2016.12.25
  • Published : 2016.12.31
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Abstract

To investigate the in-situ sound velocity of sediment in the southwestern part of the East Sea, the laboratory sound velocity was measured using the pulse transmission technique. The sediment sound velocity measured in laboratory was corrected to in-situ sound velocity based on the seafloor temperature, seawater sound velocity, Kim et al. (2004) model, and Hamilton (1980) model. The distribution of the corrected in-situ sound velocity applying Kim et al. (2004) and Hamilton (1980) models reflects the characteristics of sediments of the study area and shows a similar distribution pattern. The correction for in-situ sound velocity was mostly influenced by seafloor temperature. Then, correction of sound velocity using seafloor sediment temperature data should be accomplished for conversion of laboratory data to in-situ sound velocity.

동해 남서해역 퇴적물의 현장 음파전달속도를 파악하기 위하여 신호투과법을 이용하여 퇴적물의 실험실 음파전달속도를 측정하였다. 측정된 실험실 음파전달속도는 해저면 온도, 해수 음파전달속도, Kim et al. (2004)과 Hamilton (1980) 모델을 적용하여 현장 음파전달속도로 보정하였다. Kim et al. (2004)과 Hamilton (1980)의 현장 음파전달속도는 연구지역 퇴적물 특성을 반영하며, 유사한 분포를 보인다. 현장 음파전달속도 보정에는 해저면 온도의 영향을 크게 받는 것을 확인할 수 있다. 따라서 퇴적물의 실험실 음파전달속도를 통해 현장 음파전달속도를 파악하기 위해서는 해저표층 온도 자료를 통한 온도 보정이 반드시 수행되어야 한다.

Keywords

References

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