Diffusion of the Suspended Matter Caused by Dredging and the Effect of the Single Silt Protector

J. Ocean Eng. Technol. 1998;12(3):1-8.

Kim, Kye-Young;Chung, Jong-Yul;

준설공사시 발생하는 부유물질의 확산 및 단일오탁방지막의 효과분석

김계영;정종률;

서울대학교 해양학과;서울대학교 해양학과;

Keywords: Suspended Matter, Silt Protector, Dredging, Tide

핵심용어: 부유물질, 오탁방지막, 준설, 조석

Abstract

The purpose of this study is to determine the distribution of the suspended matter caused by dredging at the northeastern part of Kwangyang Bay and to determine the effect of the single silt protector for it. According to the direction of the tidal current, six sampling stations were chosen from the dredging site to the southeast. At the high tide, the high concentration of the suspended matter was observed below the mid-depth near the dredging site. As the tidal currents were stronger. its concentrations below the mid-depth at the inner stations of the single silt protector were rapidly increased, but those of the outer stations did not show any significant change. The concentrations at the inner stations of the silt protector at that time were from 20~140mg/l and those of the outer stations, which was only about 30 m apart from the inner station, were from 20~30mg/l. It suggests that the large amount of suspended matter caused by dredging were moved to the inner stations near the silt protector at the ebb tide and that the silt protector is very effective for the suspended matter.