한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제47권2호
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  • Pages.99-110
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  • 2005
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  • 1738-3692(pISSN)
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  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
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비모수검정을 이용한 논침투수 수질의 평가

Evaluation of Percolated Water Quality of Paddy Fields Using Nonparametric Test

  • 오승영 (국립환경연구원 수질총량관리센터) ;
  • 김진수 (충북대학교 농업생명환경대학) ;
  • 오광영 (충북대학교 대학원)
  • 발행 : 2005.03.01
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초록

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 $5{\sim}10$ 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. The median concentrations of pollutant were 1.91 mg/L for TN, 0.021 mg/L for TP, and 6.6 mg/L for COD, which were lower than its arithmetic mean concentrations by $35\%$ for TN, $36\%$ for TP, and $13\%$ for COD. The median concentrations of TN and TP differed significantly among sample sites according to the Kruskal-Wallis test. However, median concentrations were not significantly different among month except for TN and TP of Soro and COD of Odong. The percolation load of pollutants during irrigation periods in the study area were estimated at $3.12{\sim}7.75\;kg/ha$ for TN, $0.033{\sim}0.155\;kg/ha$ for TP, and 10.7 kg/ha for COD, which were much lower than respective values reported in Japan.

키워드

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피인용 문헌

  1. Characteristics of Nutrient Concentrations in Groundwater under Paddy and Upland Fields vol.53, pp.6, 2011, https://doi.org/10.5389/KSAE.2011.53.6.067