한국수산과학회

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  • 0374-8111
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  • 2287-8815

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kfas, vol. 54, no. 4, pp.480-488, August, 2021
DOI. https://doi.org/10.5657/KFAS.2021.0480

Modeling Variation in Residence Time Response to Freshwater Discharge in Gangjin Bay, Korea 남해 강진만 담수유입에 따른 체류시간 변화 모델링

김진호·박성은1 *·이원찬1
국립수산과학원 남해수산연구소, 1 국립수산과학원 어장환경과

The term residence time is defined as the time taken for substances in a system to leave the system and is a useful concept to explain the physical environment characteristics of a coastal area. It is important to know the spatial characteristics of the residence time to understand the behavioral properties of pollutants generated in a marine system. In this study, the spatial distribution of average residence time was calculated for Gangjin Bay, Korea, using a hydrodynamic model including a particle tracking module. The results showed that the average residence time was about 10 days at the surface layer and about 20 days at the bottom layer. Spatially, this was the longest residence time in the southwestern sea. There was no significant difference in average residence time at the surface layer due to freshwater discharge, but spatial variation at the bottom layer was larger. The average residence time at the bottom layer decreased in the southwestern area due to freshwater discharge and increased in the northern area. This result suggests that the residence time of anthropogenic pollutants may have a large spatial difference depending on the freshwater discharge, and thus the time taken to influence cultured organisms may also vary.

Keyword : Residence time, Freshwater discharge, Vertical variation, Particle tracking model

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