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The Distribution of Nitrogen and the Decomposition Rate of Organic Nitrogen in the Youngsan River and the Sumjin River, Korea  

Kim, Jihye (Department of Environmental Science, Kangwon National University)
Kim, Bomchul (Department of Environmental Science, Kangwon National University)
Shin, Myoungsun (Department of Environmental Science, Kangwon National University)
Kim, Jaiku (Department of Environmental Science, Kangwon National University)
Jung, Sungmin (Department of Environmental Science, Kangwon National University)
Lee, Yunkyoung (Department of Environmental Science, Kangwon National University)
Park, Juhyun (National Institute of Environmental Research)
Publication Information
Journal of Korean Society on Water Environment / v.25, no.1, 2009 , pp. 142-150 More about this Journal
Abstract
The distribution of organic nitrogen and its decomposition rate were studied in the Youngsan River and the Sumjin River system in Korea. Samples were conducted seasonally in June, August, December of 2006, and February of 2007. Collected samples were incubated for 20 days in a dark chamber ($20{\pm}1^{\circ}C$) and analyzed the changes of nitrogen form (particulate organic nitrogen, dissolved organic nitrogen, ammonia, nitrite, and nitrate). The mean total nitrogen (TN) concentration in the Youngsan River and the Sumjin River were $2.62mgN{\cdot}L^{-1}$ and $1.53mgN{\cdot}L^{-1}$, respectively. TN comprised of 65% DIN and 35% ON. The decomposition coefficients of organic nitrogen were also determined by two different fitting models. The decomposition rates of nitrogen species (TON, LPON, LDON, ${NH_4}^+$ and ${NO_2}^-$) ranged from 0.024 to $1.043day^{-1}$ in the Youngsan River and 0.008 to $0.693day^{-1}$ in the Sumjin River, respectively. The result of this study can give a guide to the selection of parameters in the calibration processes of water quality models.
Keywords
Decomposition; Organic nitrogen; Sumjin River; Youngsan River;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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