Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Correlation of Simrad EM950(95kHz) Multibeam Backscatter Strength with Surficial Sediment Properties in the Sand Ridge of the Eastern Yellow Sea

황해 동부 사퇴분포지역의 표층퇴적물 특성과 Simrad EM950(95 kHz)멀티빔 후방산란 음압간 상관관계

  • Kong, Gee-Soo (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Seong-Pil (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources) ;
  • Park, Yo-Seop (UST21) ;
  • Min, Gun-Hong (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Ji-Uk (Korea Water Resources Corporation (KWATER)) ;
  • Park, Soo-Chul (Department of Oceanography Chungnam National University)
  • 공기수 (한국지질자원연구원 석유해저자원연구부) ;
  • 김성필 (한국지질자원연구원 석유해저자원연구부) ;
  • 박요섭 ;
  • 민건홍 (한국지질자원연구원 석유해저자원연구부) ;
  • 김지욱 (한국수자원공사) ;
  • 박수철 (충남대학교 해양학과)
  • Published : 2006.12.30
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Abstract

Simrad EM950 multibeam data and surficial sediment grab samples were acquired to correlate backscatter strength with surficial sediment properties in the eastern Yellow Sea which tidal sand ridges are dominantly developed. The study area is divided into the western sand ridge zone characterized by well sorted, fine sandy sediment, and the eastern non-sand ridge zone characterized by poorly sorted, medium sand with some gravels and shell fragments. In spite of minor difference in grain size between two zones, the variations of backscatter strength between two zones are distinct. Multibeam backscatter strength of study area shows good correlation with the grain size of surface sediment as well as the carbonate contents. High occurrence of carbonate shell fragments can increase grain size and bottom roughness. The dominance of higher backscatter strength in the eastern non-sand ridge zone may reflect the effects of coarse grain size and high shell fragments contents.

표층퇴적물의 특성과 멀티빔 후방산란 음압의 상관관계를 알아보기 위하여 사퇴가 발달되어 있는 황해 동부해역에서 Simrad EM950 멀티빔 수심기와 그랩을 이용하여 후방산란 음압 자료와 표층퇴적물 시료를 취득하였다. 연구지역은 분급이 양호한 세립사로 덮여있는 서쪽 사퇴 지역과 분급이 불량하고, 자갈과 패각편을 포함하는 중사가 우세하게 덮여 있는 동쪽의 사퇴가 없는 지역으로 나뉜다. 두 지역의 입도차이는 두드러지지 않으나, 후방산란 음압의 변화는 뚜렷한 차이를 보인다. 연구지역의 멀티빔 후방산란 음압은 표층 퇴적물의 입도와 높은 상관관계를 보일 뿐만 아니라 탄산염 함량과도 깊은 관계를 갖는 것으로 나타났다. 상대적으로 높은 탄산염 패각편의 함량은 해저면의 거칠기와 입도의 증가를 야기 시킨다. 동쪽의 사퇴가 없는 지역에서 높게 나타나는 후방산란 음압 값은 조립한 입도와 상대적으로 높은 탄산염 패각편 함량의 영향을 반영하는 것으로 여겨진다.

Keywords

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