Evaluation of Percolated Water Quality of Paddy Fields Using Nonparametric Test
2005
Oh, S.Y. (National Institute of Environmental Research, Incheon, Republic of Korea) | Kim, J.S. (Chungbuk National University, Cheongju, Republic of Korea), E-mail: [email protected] | Oh, K.Y. (Chungbuk National University, Cheongju, Republic of Korea)
Characteristics of concentrations of total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD) pollutant in percolated water at four paddy field sites (Soro, Odong, Munui, and Boeun) were investigated by a nonparametric test. Percolation rate measurement and percolated water sampling were taken during irrigation periods at 5~10 day intervals. The normality of percolation rate and pollutant concentrations were examined using histogram, boxplot, and the Kolmogorov-Smirnov (K-S) test. Pollutant concentrations in percolated water showed positively skewed distribution.
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