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Unit Loadings of Heavy Metals by Non-point Sources - Case Study in a Valley Watershed -
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 Title & Authors
Unit Loadings of Heavy Metals by Non-point Sources - Case Study in a Valley Watershed -
Kim, Jin-Ho; Han, Kuk-Heon; Lee, Jong-Sik;
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The study was carried out to estimate runoff loads of heavy metals in the valley watershed at the middle of South Korea, during farming season. There were no other pollution sources except agricultural activity. From 27 April 2006 to 31 October 2007, water samples were collected using two methods. The first method was regular sampling wherein water samples were taken every two weeks; and the other method was through regular sampling when water were collected during each rainfall event. Results showed that heavy metals were found in the water from the regular samples, and were highest during May and June. It was presumed that this might have been contributed by farming activities. Heavy metal concentration of the irregular samples was lower than regular samples. The correlation coefficient between each heavy metal of the regular samples were as follows: Fe-Al>Cr-Al>Fe-Cr>Mn-Fe. The correlation coefficient of the irregular samples were the following: Fe-Al>Fe-Cu is positive; and Pb-Cu>Ni-Al is negative. Measured pollutant loads of heavy metals in the valley watershed were : 2.047 kg of Al, 0.008 kg of Cd, 0.034 kg of Cr, 0.311 kg of Cu, 0.601 kg of Fe, and 0.282 kg of Zn in 2006; while in 2007, the following were observed: 2.535 kg of Al, 0.026 kg of Cd, 0.055 kg of Cu, 0.727 kg of Fe, and 0.317 kg of Zn. In the analysis of data gathered, the loading rates of effluents from the valley watershed during the rainy season were : 79.8% of Al, 69.1% of Cu, 82.5% of Fe, and 69.1% of Zn in 2006; while 69.9% of Al, 67.5% of Cu, 70.4% of Fe, and 67.5% of Zn in 2007.
Heavy metals;Unit pollutant loads;Correlation;Valley watershed;
 Cited by
우리나라 농경지 중금속 동태 및 작물흡수 연구동향,이지호;김지영;고우리;정은정;;정구복;김두호;김원일;

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