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KMID : 1024520110200111403
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Journal of the Environmental Sciences
2011 Volume.20 No. 11 p.1403 ~ p.1415
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A Study on the Transport of Anchovy Engraulis japornicus Egg-larvae in the South Sea of Korea
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Kim Dong-Sun
Bae Sang-Wan
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Abstract
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To understand the transport of anchovy egg-larvae, an integrated model consisting of a hydrodynamic model and a three-dimensional Lagrangian diffusion model was used for the anchovy Engraulis japornicus egg-larvae trace. Fist, in order to determine the circulation characteristics of the South Sea of Korea, residual flow according to tide, density and wind effect was investigated. In offshore regions, tide-induced residual current tends to flow eastward during the spring tide and westward during the neap tide. Residual flow is irregular due to the bottom topography in the coastal area. No special tendency was apparent in the open sea. Especially, the flow in the offshore regions showed results similar to that of the Tsushima Warm Current. The transport of anchovy egg-larvae is decided the physical properties of sea water. It is estimated that anchovy eggs spawned near the Jeju Island travels offshore, rather than to coastal areas, and grow in the front area between the coastal sea and offshore regions.
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KEYWORD
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Egg-larvae, Integrated model, Lagrangian, Diffusion, Residual flow, Tide-induced residual current
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