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KMID : 1024519990080020155
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Journal of the Environmental Sciences
1999 Volume.8 No. 2 p.155 ~ p.160
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A Study on the Eutrophication in the Keum River
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You Sun-Jae
Kim Jong-Gu
Kwon Tae-Yeon
Lee Suk-Mo
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Abstract
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To investigate the water quality characteristics and eutrophication of the Keum River, survey were conducted on samples collected from 6 stations in Aug. and Oct. in 1995 and Jan. and May in 1996. The results were summarized as follows ; Concentration of pollutants were in the range of 1.74~6.35(mean 3.81)mg/for BOD and 1.98~8.21(5.14)mg/for COD and 1.46~51.94(18.52)g/for TSS. Water quality were evaluate to be 2~3 grade of station 1 and other stations were 3~4 grade of water quality criteria. The concentration of nutrients were in the range of 55.2~735.3(309.3)-at/for Dissolved inorganic nitrogen(DIN) and 0.06~6.03(2.80)-at/ for dissolved inorganic phosphate(DIP). Nutrient concentrations in Keum River were usually high and the DIN/DIP ratio ranged from 72 to 2648. The concentration of chlorophyll-a was in the range of 1.1~143.7(44.3)mg/㎥. Chlorophyll-a concentration were high 10mg/㎥ except station 1, which is the value of eutrophication criteria by EPA. Correlations between nutrients and chlorophlly-a were not significant. According to eutrophication evaluation, Keum river was equivalent to the eutrophic state.
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KEYWORD
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Keum River, water quality characteristics, eutrophication evaluation
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