Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Remote Seabed Classification Based on the Characteristics of the Acoustic Response of Echo Sounder: Preliminary Result of the Suyoung Bay, Busan

측심기의 음향반사 특성을 이용한 해저퇴적물의 원격분류: 부산 수영만의 예비결과

  • Kim Gil Young (Marine Geosciences Division, Naval Research Laboratory, Stennis Space Center) ;
  • Kim Dae Choul (Department of Environmental Exploration Engineering, Pukyong National University) ;
  • Kim Yang Eun (Department of Environmental Exploration Engineering, Pukyong National University) ;
  • Lee Kwang Hoon (Department of Ocean Information Science, Kunsan National University) ;
  • Park Soo Chul (Department of Oceanography, Chungnam National University) ;
  • Park Jong Won (Department of Information and Communications Engineering, Chungnam National University) ;
  • Seo Young Kyo (Department of Applied Geology, Pukyong National University)
  • 김길영 (미해군연구소 해양지질과학부) ;
  • 김대철 (부경대학교 환경탐사공학과) ;
  • 김양은 (부경대학교 환경탐사공학과) ;
  • 이광훈 (군산대학교 해양정보학과) ;
  • 박수철 (충남대학교 해양학과) ;
  • 박종원 (충남대학교 정보통신공학과) ;
  • 서영교 (부경대학교 응용지질학과)
  • Published : 2002.05.01
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Abstract

Determination of sediment type is generally based on ground truthing. This method, however, provides information only for the limited sites. Recent developments of remote classification of seafloor sediments made it possible to obtain continuous profiles of sediment types. QTC View system, which is an acoustic instrument providing digital real-time seabed classification, was used to classify seafloor sediment types in the Suyoung Bay, Pusan. QTC View was connected to 50 kHz echo sounder, All parameters of QTC View and echo sounder are uniformly kept during survey. By ground truthing, the sediments are classified into seven types, such as slightly gravelly sand, slightly gravelly sandy mud, gravelly muddy sand, clayey sand, sandy mud, slightly gravelly muddy sand, and rocky bottom. By the first remote classification using QTC View, four sediment types are clearly identified, such as slightly gravelly sand, gravelly mud, slightly gravelly muddy sand, and rocky bottom. These are similar to the result of the second survey. Also the result of remote classification matches well with that of ground truthing, but for sediment type determined by minor component. Therefore, QTC View can effectively be used for remote classification of seafloor sediments.

해양의 표층퇴적물을 분류하는 일반적인 방법은 ground frothing에 의한 것으로 시료채취 정점에 국한된 자료라는 한계성을 가지고 있다. 최근에는 원격분류방법의 개발로 인하여 이러한 한계성을 극복한 연속적인 자료를 얻을 수 있도록 가능하게 되었다 본 연구에서는 해저면의 원격분류결과를 실시간 수치화된 자료로 얻을 수 있는 음향장비인 QTC View라는 기기를 이용해 부산 수영만의 표층 퇴적물을 원격분류 하였다. QTC View는 50kHz의 음향측심기와 연결하였고 측정장비의 설정환경은 조사동안 일정하게 유지하였다. Ground trothing에 의한 시료 분석결과 수영만은 slightly gravelly sand, slightly gravelly sandy mud. gravelly muddy sand, clayey sand, sandy mud, slightly gravelly muddy sand 그리고 rocky bottom의 총 7개의 퇴적물형으로 분류되었다. QTC View를 이용한 1차 원격분류결과 이들 7개 중 slightly gravelly sand, gravelly muddy sand, sandy mud 및 rocky bottom 등 4개의 퇴적물형이 구분되었으며 이는 2차 원격분류결과에서도 유사하게 분포하는 것으로 확인되었다. Ground frothing에 의한 분류자료와 원격분류 자료를 비교한 결과 퇴적물형을 구분할 때 소량성분에 의해 서로 다르게 구분된 경우는 다소 차이가 있으나 연구지역 전반에 걸친 퇴적물의 분포양상은 잘 일치하는 것으로 나타났다. 따라서 QTC View는 해저퇴적물을 원격분류하는데 유효하게 이용될 수 있을 것으로 본다.

Keywords

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