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KMID : 1156220060320050424
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Journal of Environmental Health Sciences
2006 Volume.32 No. 5 p.424 ~ p.430
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A Study on the Establishment and Achievement of Target Water Quality by Water System of Major Streams in the Gangwon Province
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Huh In-Ryang
Choi Ji-Yong
Kim Yeong-Jin
Kim Sung-Seok
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Abstract
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Since 1985, the Gangwon Institute of Health and Environment(GIHE) and Ministry of Environment have collected rivers and streams water quality data in an ambient surface water monitering program. This study was prepared to propose an achievement of water quality of rivers subject to management by area according to an created level while establishing a water quality level applicable to the Gangwon area. As a result of evaluating correlativity on the BOD-based water quality data, BOD versus TP, and TP versus SS demonstrated significance at a confidence level of 95%. Evaluating correlativity on 10~90 percentile values of analyzed data, a coefficient of determination, r2 of BOD versus TP, and TP versus SS were 0.625, 0.286 respectively. Grading the results by evaluation method, the representative values of TP were 0.030 ㎎/ℓ for Ⅰ level, 0.100㎎/ℓ for Ⅱ level, 0.200㎎/ℓ for Ⅲ level, 0.300 ㎎/ℓ for Ⅳ level, and 0.350 ㎎/ℓ for Ⅴ level, and those of SS were indicated 4.0 ㎎/ℓ for Ⅰ level, 15.0 ㎎/ℓ for Ⅱ level, 30.0 ㎎/ℓ for Ⅲ level, 45.0 ㎎/ℓ for Ⅳ level, and 60.0 ㎎/ℓ for Ⅴ level. As for the limiting factor allowing the water quality standard exceeded, BOD posted 61% as the factor was found in 11 places, TP 28%, and SS 33%.
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KEYWORD
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water quality, BOD, TP, SS, Gangwon
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