비점원에 의한 중금속 원단위 부하량- 곡간지 유역을 중심으로 -
Unit Loadings of Heavy Metals by Non-point Sources- Case Study in a Valley Watershed -
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참고문헌
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초록
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 day-1 of Al, 0.008 kg day-1 of Cd, 0.034 kg day-1 of Cr, 0.311 kg day-1 of Cu, 0.601 kg day-1 of Fe, and 0.282 kg day-1 of Zn in 2006; while in 2007, the following were observed: 2.535 kg day-1 of Al, 0.026 kg day-1 of Cd, 0.055 kg day-1 of Cu, 0.727 kg day-1 of Fe, and 0.317 kg day-1 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.
Abstract
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 day-1 of Al, 0.008 kg day-1 of Cd, 0.034 kg day-1 of Cr, 0.311 kg day-1 of Cu, 0.601 kg day-1 of Fe, and 0.282 kg day-1 of Zn in 2006; while in 2007, the following were observed: 2.535 kg day-1 of Al, 0.026 kg day-1 of Cd, 0.055 kg day-1 of Cu, 0.727 kg day-1 of Fe, and 0.317 kg day-1 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.
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