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Assessing Average Residence Time as a Physical Descriptor for Shellfish Farming Areas in Jaran Bay, Korea

자란만 패류양식해역의 물리환경 설명을 위한 평균체류시간 산정

  • Kim, Jin Ho (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Park, Sung-Eun (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Youngmin (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Chung Sook (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kang, Sungchan (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Jung, Woo-Sung (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Sim, Bo-Ram (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Eom, Ki-Hyuk (Marine Environment Research Division, National Institute of Fisheries Science)
  • 김진호 (국립수산과학원 어장환경과) ;
  • 박성은 (국립수산과학원 어장환경과) ;
  • 김영민 (국립수산과학원 어장환경과) ;
  • 김청숙 (국립수산과학원 어장환경과) ;
  • 강성찬 (국립수산과학원 어장환경과) ;
  • 정우성 (국립수산과학원 어장환경과) ;
  • 심보람 (국립수산과학원 어장환경과) ;
  • 엄기혁 (국립수산과학원 어장환경과)
  • Received : 2019.12.30
  • Accepted : 2020.03.13
  • Published : 2020.03.31

Abstract

Residence time is defined as the time taken for a material in a system to leave the system. The residence time characteristics in shellfish aquaculture determine the dispersion of excretion from aquaculture farms, along with the supply of food by seawater exchange. In this study, we estimated the spatial distribution of average residence time in the shellfish farming area using a particle tracking model. As a result, a relatively short average residence time of about 20 days or less was calculated in most areas, but an average residence time of more than 40 days was calculated in the inner areas. Relatively long average residence times were calculated along the west coast compared to the east coast, with the longest average residence time of more than 50 days in the northwestern areas. It can be inferred that the disturbance of the benthic ecosystem caused by shellfish farms is likely to be large because of the relatively weak dispersion of excrement from shellfish farms located on the west coast, especially in the northwest region. This distribution of average residence time is important for understanding the potential effects of seawater exchange on the environmental sustainability of shellfish farms, along with the seawater circulation characteristics of Jaran Bay.

Acknowledgement

Supported by : 국립수산과학원

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