Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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Characteristics of Sedimentary Environments in Gamak Bay based on Numerical Experiments

수치실험에 기초한 가막만의 퇴적 환경 특성

  • Kim, Byeong Kuk (National Park Research Institute, Korea National Park Service) ;
  • Park, Sung Jin (GeoSystem Research Corporation) ;
  • Lee, Moon Ock (Faculty of Marine Technology, Chonnam National University) ;
  • Lee, Yeon Gyu (Faculty of Marine Technology, Chonnam National University) ;
  • Kim, Jong Kyu (Faculty of Marine Technology, Chonnam National University)
  • 김병국 (국립공원관리공단 국립공원연구원) ;
  • 박성진 ((주)지오시스템리서치 해양조사부) ;
  • 이문옥 (전남대학교 해양기술학부) ;
  • 이연규 (전남대학교 해양기술학부) ;
  • 김종규 (전남대학교 해양기술학부)
  • Received : 2013.08.23
  • Accepted : 2014.05.13
  • Published : 2014.05.25
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Abstract

We carried out numerical experiments to understand sedimentary environments in Gamak Bay where is located in the center of the southern coast of Korea. Deposition rates in Gamak Bay appeared to increase in the autumn and spring whereas they appeared to decrease in the summer and winter. These seasonal variations qualitatively coincided with seasonal variations of Ignition Loss (IL) for surface sediments. Furthermore, deposition rates turned out to be prevalent compared to erosion rates in most areas of the bay. On the other hand, current measurement results at both the northeast and south mouths of the bay showed their residual components to flow into the bay. Therefore, we can conclude that contaminated materials flowing into Gamak Bay will precipitate to be deposited in the bay as long as there is no specific events such as dredging.

한국 남해안의 중심에 위치한 가막만의 퇴적 환경을 파악하기 위해 수치실험을 실시하였다. 가막만에서는 추계와 춘계에 퇴적량이 증가하는 반면, 하계와 동계에는 퇴적량이 감소하는 것으로 나타났다. 이러한 계절적 변화는 표층퇴적물 강열감량의 계절 변화와 정성적으로 일치하였다. 한편, 현장조사 결과에서 북동쪽과 남쪽에 위치한 두 개의 만구에서는 잔차류가 만내로 향하고 있고, 또한 만내에서는 대부분의 해역에서 퇴적이 침식에 비해 상대적으로 우세한 것으로 나타났다. 따라서, 가막만으로 유입된 오염물질들은 준설 등 특별한 이벤트가 없는 한 대부분 만내에 침강되어 퇴적할 것으로 판단되었다.

Keywords

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