The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Assessment of River Water Quality Contaminated by Abandoned Mine and Hot-Spring using Principal Component Analysis

주성분분석기법을 적용한 온천 및 폐광산 오염원에 대한 하천수질평가

  • Lee Jae-Young (Department of Civil and Environmental Engineering, University of Central Florida) ;
  • Sato Yuko (Department of Environmental Engineering, Hokkaido University) ;
  • Kang Meea (Department of Environmental Engineering, Andong National University) ;
  • Jeong Gyo-Cheol (Department of Earth and Environmental Sciences, Andong National University)
  • Published : 2005.12.01
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Abstract

S City depends on the T River as source water for water supply. Arsenic and boron from the hot-spring waste-water discharged from the hot-spring spa resort and emerging from the fractures of bedrock of the river have been prevalent contaminant of the T River water. This research was conducted to propose the simple and quick surrogate parameter for water quality management easily. And through making hexa-diagram of principal ions in the water samples, existing state of the water and influence of the human activity or geological origin can be figured out. As a results of characteristics of the T River water quality using principal component analysis, the contributory percentages of the 1st, 2nd and 3rd principal components were $40.80\%,\;21.40\%\;and\;11.31\%$, respectively. Therefore it was clarified that the quality of the T River water could be explained by these three principal components. Concentration of the chloride ion, which is one of the characteristics of the hot-spring water, was well correlated to both arsenic and boron concentrations. Hence concentrations of the arsenic and boron in the raw water of the water reatment plant can be predicted by the measurement of concentration of the chloride ion.

일본의 5시는 상수원수로서 T하천을 이용하고 있으며, T하천의 수질은 비소와 보론 등의 폐광산 및 온천유래의 오염원에 의한 수질특성을 갖고 있다. 이 연구는 T하천의 수질특성 에 대하여 주성분분석 기법을 적용하여 분석하여 보다 용이한 하천관리 인자를 도출하고자 하였다. 이 연구에서 제시한 hexa-diagram을 이용하면, 각 수질측정 지점에서의 주요 오염원을 쉽게 파악할 수 있어 하천관리에 유효한 지표로 사용될 수 있다. 또한 주성분분석을 적용하여 하천수질의 특성을 조사한 결과, 1st, 2nd, 3rd 성분들의 각 고유값은 5.30, 2.78 및 1.47로 나타났으며, 1st, 2nd, 3rd 성분들의 기여도는 각각 $40.80\%,\;21.40\%\;및\;11.31\%$로 나타났다. 그러므로 이들 주성분을 이용하면, T하천의 수질특성을 보다 정확하고 신속하게 평가할 수 있다고 판단된다. 온천수의 주요성분으로 나타나는 염소이 온은 정수처리 공정에서 제거하기가 곤란한 비소와 보론의 관계에서 매우 높은 상관관계를 나타내어 염소이온농도를 이용한 하천관리는 비소와 보론 분석에 드는 시간적, 경제적인 부하를 저감하여 보다 신속한 처리가 가능하도록 하므로 하천수질관리의 효율을 개선할 것으로 기대한다.

Keywords

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