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Evaluation of Water Quality Characteristics at Kyeongan Stream Using the Flow-Loading Equation and Factor Analysis

유량-오염부하량 관계식과 요인분석을 이용한 경안천의 수질특성 평가

Phil-Sang Kwon1
,
Min-Ji Park1
,
Young-Joon Lee1
,
Yong-Chul Cho1*
,
Chang-Wan Noh1
,
Woo-Seok Jung1
,
Ji-Ho Kim1
,
Soon-Ju Yu1
권 필상1
,
박 민지1
,
이 영준1
,
조 용철1*
,
노 창완1
,
정 우석1
,
김 지호1
,
유 순주1
1Han River Environment Research Center, National Institute of Environment Research
1국립환경과학원 한강물환경연구소
*교신저자. *Corresponding Author. 
31 December 2017. pp. 226-236
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Abstract

In this study, we aimed to analyze the characteristics of water quality variation at Kyeongan Stream for a decade and to investigate by the flow-loading equation. The correlation analysis of water quality parameters and the influence factors were examined by statistical analysis. The characteristics of water quality variation showed that the fluctuations in BOD5, CODMn and TOC were repeated from year to year. TN and TP were decreased by year. By the flow-loading equation, the concentrations of BOD5, CODMn, TOC and TN were decreased when the flow rate was on the rise. However, the flow did not affect the concentration of TP. According to correlation analysis, BOD5 was highly correlated with CODMn and TOC with the correlation coefficients of 0.890 (p<0.01) and 0.721 (p<0.01). The result of factor analysis, we identified that the water quality in Kyeongan Stream has been highly influenced by the organic matter index, followed by nitrogenous substance depending on the seasonal variations and the influx of suspended solid in accordance with the increase of flow.

Keywords
Correlation analysis
Factor analysis
Flow-loading equation
Kyeongan stream
Multivariate statistics analysis

본 연구에서는 경안천의 10년 수질변화 특성을 분석하고 유량-오염부하량 관계식을 이용하여 고찰하였다. 통계분석을 이용하여 수질 항목간의 상관분석과 수질에 영향을 미치는 요인분석을 하였다. 수질변화 특성 결과 BOD5, CODMn, TOC는 연도별로 증가와 감소를 반복하는 것으로 나타났고 TN, TP는 연도별로 감소하는 것으로 나타났다. 유량-오염부하량 관계식을 통한 오염물질 유출특성결과 유량 증가 시 BOD5, CODMn, TOC, TN농도는 감소하였으나, TP농도 변화에는 영향을 주지 않는 것으로 나타났다. 상관분석 결과 BOD5는 CODMn, TOC의 상관계수가 0.890 (p<0.01), 0.721 (p<0.01)로 상관성이 통계적으로 높게 나타났다. 요인분석 결과 경안천은 유기물 지표항목에 의한 요인이 가장 크며 계절변화에 따른 질소물질에 의한 요인, 유량증가에 따른 부유물질 유입 요인 순으로 수질에 영향을 받고 있는 것으로 설명할 수 있다.

키워드
상관분석
요인분석
유량-오염부하량 관계식
경안천
다변량통계분석
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 4
  • No :4
  • Pages :226-236
  • Received Date : 2017-11-17
  • Revised Date : 2017-12-01
  • Accepted Date : 2017-12-01
  • DOI :https://doi.org/10.17820/eri.2017.4.4.226
Journal Informaiton Ecology and Resilient Infrastructure Ecology and Resilient Infrastructure
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