Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5784434 | Marine Geology | 2018 | 8 Pages |
Abstract
Simultaneous satellite and ship-borne surveys have been conducted to investigate the dispersion patterns of dredging plumes off the south coast of Korea in two contrasting seasons (spring and autumn). The distribution of total suspended solid (TSS) derived from sequential satellite imagery showed that the dredging plumes in spring developed over longer distances along the surface current than those in autumn. In spring, the deep and strong stratified condition in the water column contributed to the increase in radius of plume dispersion along the water surface. In autumn, the shallow and vertically well-mixed (or un-stratified) condition in the water column enhanced sinking of suspended dredged materials. This difference is due to the Brunt-Väisälä frequency being higher in spring (0.0183 sâ 1) than in autumn (0.0123 sâ 1). Although the sediment-laden overflow significantly increased TSS near the surface during the dredging period, the TSS contribution to water column stratification was only 2.3â5.6% of the thermohaline contribution. Therefore, the seasonal variation of thermohaline density is the main factor determining the dispersion patterns of dredging plumes in the study area.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Jun Young Seo, Ho Kyung Ha, Jungho Im, Jin Hwan Hwang, Sun Min Choi, Nam-Il Won, Youngsung Kim,