A Stochastic Analysis of the Water Quality with Discharge Variation in Upper Nakdong River Basin

최현구; Han Kun Yeun; 최승용

The purpose of this study is to analysis pollutant loading of upper Nakdong River basin according to the variation of discharge. The correlation between discharge and pollutant concentration and between discharge and pollutant loading were analyzed by statistical method, respectively. Regression equation of pollutant loading and discharge was represented as L = _aQ^b in which L = pollutant loading(kg/day), and b = regression coefficients, and Q =discharge(m^3/day). The correlation coefficient of study area was in range of 0.8428 to 0.9935. The SS was the highest b value 1.2856~1.7730 among water quality parameters because the pollutant loading of SS was much affected by flow. Additionally, the applicability of the regression equations was verified by comparing predicted results with observed value. The correlation coefficient of verification was in range of 0.8983 to 0.9987 and NSEC was in range of 0.7018 to 0.9960. Therefore the pollutant loading was good correlated with discharge. The main result will be used as basic data for water quality management and design of environment fundamental facilities.

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* 2022년 이후 발행 논문의 참고문헌은 현재 구축 중입니다.

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