Diffusion Characteristic of Ocean Dumping Material in the Southeaster Coastal Waters of Korea

J. Ocean Eng. Technol. 2002;16(1):16-21.

동해 남동해역 해양투기물질의 확산 특성

홍도웅,김종규,류청로

부경대학교 해양공학과,부경대학교 해양공학과,부경대학교 해양공학과

Keywords: Ocean Dumping Material, Diffusion, Tubulent Diffusivity, Settling Velocity

핵심용어: 해양투기물질, 확산, 난류확산계수, 침강속도

Abstract

The diffusion characteristics of an ocean dumping material in the south-eastern East/Japan Sea related to regulate the physical characteristics with the observation and the hydraulic experiment are investigated. The main results are as follows; (1) Spying CTD observation result of the area of Jung in the East/Japan Sea, the ocean dumping area had influenced the Tsushima Warm Current of high temperature and salinity. Horizontal turbulent diffusivity is 1.913$ imes$10$^{7}$ by drogue tracking. (2) From the experiment of settling, the initial settling velocity of each material is 1.0~2.7 cm/sec according to the specific gravity and initial concentration. In the pycnocline, particles didn't settle under the pycnocline any more and accumulated. It is signified that calculation of the sedimentation rate of the ocean dumping material including of vertical diffusion must be regard the pynocline in the ocean area have well-developed pycnocline. (3) Vertical turbulent diffusivity were 2.219$ imes$10$^{-8}$ ~8.874$ imes$10$^{-4}$ cm$^2$/sec from the experiment of settling. And, the pycnocline influenced the vertical turbulent diffusivity.