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Spatial and Temporal Variability of Residual Volume Transport according to Artificial Freshwater Discharge in Yeoungsan River Estuary, South Korea

Jin Il Song, Jong Wook Kim, Byung Il Yoon and Seung-Buhm Woo
Journal of Coastal Research
Special Issue No. 75: Proceedings of the 14th International Coastal Symposium, Sydney, 6-11 March 2016. Vol. 1 (March 2016), pp. 153-157
Stable URL: http://www.jstor.org/stable/43752536
Page Count: 5
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Abstract

To determine the effect of artificial freshwater discharge on the spatial and temporal variability of residual current and residual volume transport, current and density profile data have been analyzed in the Yeoungsan River estuary (YRE), South Korea. Current and density data were obtained from three transects during no freshwater discharge and during freshwater discharge. The residual current structure is complex (e.g., vertically multi-layer) during no freshwater discharge, due to the combined influence of tides, wind, and topography. In contrast, strong freshwater discharge influences vertical mixing at the surface layer and no mixing at the bottom layer. This mixing characteristic causes a salinity gradient with depth and significant stratification. The direction of residual volume transport is flooddirection during no freshwater discharge and ebb-direction during freshwater discharge. Residual volume transport and stratification are shown to be dependent on artificial freshwater discharge in the YRE.

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