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http://dx.doi.org/10.9765/KSCOE.2020.32.1.39

Seasonal Variation of Residual Flow and Prospect for Sediment Transport in the Macrotidal Coastal Area  

Lee, Jong Dae (Department of Ocean Sciences, College of Natural Science, Inha University)
Yoon, Byung Il (Department of Ocean Sciences, College of Natural Science, Inha University)
Kim, Jong Wook (Department of Ocean Sciences, College of Natural Science, Inha University)
Kim, Myung-Seok (Department of Ocean Sciences, College of Natural Science, Inha University)
Jeong, Jae-Soon (Department of Ocean Sciences, College of Natural Science, Inha University)
Woo, Seung-Buhm (Department of Ocean Sciences, College of Natural Science, Inha University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.32, no.1, 2020 , pp. 39-47 More about this Journal
Abstract
In order to investigate current characteristics at the Gungpyung beach, which is a macrotidal flat, field measurements were carried out in the summer and winter at the intertidal and the subtidal zones. The distribution of residual current at intertidal flat was dominant in the northward direction in the summer and dominant in the northward and southwestern directions in the winter. The direction and speed of the residual current in the winter are highly correlated with the significant wave height, and the turbidity is also highly correlated with the significant wave height. Therefore, in the winter, high sediment rates are suspended by high waves, and sediments are transporting due to the residual current in the southwest direction. On the other hand, it is expected that the northward residual current is predominant due to the small wave in the summer, and sediment transport does not occur largely due to less suspended sediments. In addition, sediment transport in the southern direction is blocked by the dock, which is the artificial structure, and the erosion occurs in the south side of the dock. The erosion pattern in the macrotidal zone of Yellow sea is dominated by seasonal waves, and blocking of sediments by artificial structure is very important.
Keywords
seasonal variation in residual current; sediment transport; artificial structure; intertidal flat;
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