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A Study on Temporal-Spatial Water Exchange Characteristics in Gamak Bay using a Method for Calculating Residence Time and Flushing Time

체류시간과 교체시간 계산을 통한 가막만의 시·공간적 해수교환 특성 연구

  • Kim, Jin Ho (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Lee, Won Chan (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Hong, Sok Jin (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Park, Jung Hyun (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Chung Sook (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Jung, Woo Sung (Marine Environment Research Division, National Institute of Fisheries Science) ;
  • Kim, Dong-Myung (Department of Ecological Engineering, Pukyong National University)
  • 김진호 (국립수산과학원 어장환경과) ;
  • 이원찬 (국립수산과학원 어장환경과) ;
  • 홍석진 (국립수산과학원 어장환경과) ;
  • 박정현 (국립수산과학원 어장환경과) ;
  • 김청숙 (국립수산과학원 어장환경과) ;
  • 정우성 (국립수산과학원 어장환경과) ;
  • 김동명 (부경대학교 생태공학과)
  • Received : 2016.05.11
  • Accepted : 2016.06.28
  • Published : 2016.08.31

Abstract

The concepts of residence time and flushing time can be used to explain the exchange and transport of water or materials in a coastal sea. The application of these transport time scales are widespread in biological, hydrological, and geochemical studies. The water quality of the system crucially depends on the residence time and flushing time of a particle in the system. In this study, the residence and flushing time in Gamak Bay were calculated using the numerical model, EFDC, which includes a particle tracking module. The average residence time was 55 days in the inner bay, and the flushing time for Gamak Bay was about 44.8 days, according to the simulation. This means that it takes about 2 months for land and aquaculture generated particles to be transported out of Gamak Bay, which can lead to substances accumulating in the bay. These results show the relationships between the transport time scale and physical the properties of the embayment. The findings of this study will improves understanding of the water and material transport processes in Gamak Bay and will be important when assessing the potential impact of coastal development on water quality conditions.

Keywords

Residence time;Flushing time;Gamak bay;Water exchange

Acknowledgement

Supported by : 국립수산과학원

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