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韓國と日本における非点源汚濁物質の流出特性の比較~ソヤ ン江流城と湖山池流城を對象として~
史承煥,城戶由能,細井 由彦,金凡徹,上島光雄,福井伸之 江原大學校 附設 環境硏究所 2000 環境硏究 Vol.17 No.-
The purpose of this study is to compare and identify the differences in storm and pollutant runoff characteristics of Korea and of Japan. In Japan. the pollutant load increases steadily over the year and shows a slight increase during rainy season like typhoon. In korea the loading of TP, TN and DOC increases extrernely during the rainy season from June to August and reaches 90%, 74% and 68% of its annual loading, respectively. The analysis of polluto-graphs shows that TN concentration during a storm event decreases in Korea. This means that the dissolved form of TN dominates over the particle form in Korea. Until the first 50% of the total volume of stormwater runoff, the ratio of pollutant runoff of the total pollutant is 35%~65% in Japan, however, it reaches to 60%~80% in Korea by Cumulative Curve analysis. Further the antecedent dry weather period affects the pollutant runoff in Japan, but such an effect is less in Korea. Finally, this study shows that several consideration points when the research result of Japan is applied in Korea.
김범철,최광순,김형봉,사승환 한국육수학회 2000 생태와 환경 Vol.33 No.4
Seasonal and vertical variations of organic carbon and chemical oxygen demand (COD_(Mn)) were investigated to estimate a suitability of COD_(Mn) method as an index of the quantity of organic matter in Lake Soyang. Organic matter in the lake may be composed matters resistant to oxidation by COD_(Mn) method, especially in deep layers. Ratios of COD_(Mn) to TOC varied with season and depth layer in Lake Soyang. In the inflowing river, the ratios after summer monsoon were very low and significantly different compared with other seasons (p < 0.001 between after summer monsoon and other seasons by unpaired sample t-test). At the dam site the ratio was low in the deep layer. The ratios in deep layer were significantly different compared with those of upper and middle layers (p<0.001 by paired sample t-test). In Lake Soyang COD_(Mn) yielded only 40% of TOC and the oxidation rate of COD_(Mn) varied largely with season and depth. These results implied that the COD_(Mn) does not seem to be an index of organic matter in lakes.