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KMID : 1024520160250081087
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Journal of the Environmental Sciences
2016 Volume.25 No. 8 p.1087 ~ p.1095
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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
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Kim Jin-Ho
Lee Won-Chan
Hong Sok-jin
Park Jung-Hyun
Kim Chung-Sook
Jung Woo-Sung
Kim Dong-Myung
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Abstract
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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.
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KEYWORD
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Residence time, Flushing time, Gamak bay, Water exchange
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