Analysis of Pollutant Loads and Physical Oceanographic Status at the Developing Region of Deep Sea Water in the East Sea

J. Ocean Eng. Technol. 2005;19(1):14-19.

LEE IN-CHEOL;YOON BAN-SAM;

Department. of Ocean Engineering, Pukyong National University;Research Center for Ocean Industrial Development, Pukyong National University;

동해 심층수 개발해역의 오염부하량 해석과 해동변동

이인철;윤한삼;

부경대학교 해양공학과;부경대학교 해양산업개발연구소;

Keywords: East Sea, Deep Sea Water, Pollutant Loads, Physical Oceanographic Status

핵심용어: 동해, 심층수, 오염부하, 해황변동

Abstract

As a basic study for establishing the input conditions of a forecasting/estimating model, used for deep-sea water drainage to the ocean, this study was carried out as follows: 1) estimating the amount of river discharge and pollutant loads into the developing region of deep sea water in the East Sea, Korea, 2) a field observation of tidal current, vertical water temperature, and salinity distribution, 3) 3-D numerical experiment of tidal current to analyze the physical oceanographic status. The amount of river discharge flowing into this study area was estimated at about $462.7{ imes}103 m^3/day$ of daily mean in 2002. Annual mean pollutant load of COD, TN, and TP were estimated at 7.02 ton-COD/day, 4.06 ton-TN/day, and 0.39 ton/day, respectively. Field observation of tidal current normally shows 20-40cm/sec of current velocity at the surface layer, and it decreases under 20cm/sec as the water depth increases. We also found a stratification condition at around 30m water depth in the observation area. The differences in water temperature and salinity, between the surface layer and the bottom layer, were about 18 C and 0.8 psu, respectively. On the other hand, we found a definite trend of 34 psu salinity water mass in the deep sea region.