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박관석,오윤근 제주대학교 환경연구소 1995 환경연구논문집 : 제주대 Vol.3 No.1
This study was performed about some major items such as Water Temperature, Salinity, pH, COD, T-N and PO_(4)^(3-)-P on to examine the water quality characteristics of ground-seawater in the eastern and the southern coasts of Cheju island from May to September in 1994. The water temperature in ground-seawater was about 17±1℃ in two coasts, but that in natual-seawater changed greatly amrclmg to season. COD in natual-seawater was 0.79-0.82mg/l. and was higher than that of ground-seawater bemg 0.53-0.54mg/l. The concentration of T-N and PO_(4)^(3-)-P in ground-seawater were hgher than those of natual-seawater: Average concentrations of T-N and PO_(4)^(3-)-P in ground-seawater were 24.72~26.79 ㎍-at/l and 1.15-1.16 ㎍-at/l respectively, whde those in natual-seawater were 3.54~3.65 ㎍-at/I and 0.32-0.34 ㎍-at/l respectively.