Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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The Effects of Pollutants into Sub-basin on the Water Quality and Loading of Receiving Streams

하천 수질 및 부하량에 미치는 유역 내 오염원의 영향

  • 한미덕 (국립환경과학원 물환경연구부) ;
  • 손지영 (국립환경과학원 물환경연구부) ;
  • 류지철 (국립환경과학원 물환경연구부) ;
  • 안기홍 (국립환경과학원 물환경연구부) ;
  • 김용석 (국립환경과학원 물환경연구부)
  • Received : 2014.06.25
  • Accepted : 2014.09.29
  • Published : 2014.09.30
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Abstract

We examined the effects of pollutants into sub-basin on the water quality and loading based on data surveyed during January-December 2013 from 13 sites of 5 streams in the Jinwi watershed. We used the contour plot and Kruskal-Wallis rank sum test to analyze seasonal variation of water quality and loading and Pearson correlation analysis to assess the relationships between pollutants and loadings. The significantly higher seasonal variation were SS, TN and TOC as compared to other water quality constituents (P < 0.001). A significant interaction existed between the effects of human population and the effects of discharge of Sewage Treatment Plant (STP) on water quality and loading, especially for the spring and winter seasons. It is necessary to control discharge water of sewage and wastewater from industrial facilities and to make full use of the watershed management system such as TMDLs in operation since 2012 for improvement in stream water quality.

본 연구에서는 진위천 수계내 5개 하천의 13개 지점에서 2013년 1월부터 12월 사이에 조사된 자료를 바탕으로 수질 및 부하량에 미치는 유역 내 오염원의 영향을 평가하였다. 수질과 부하량의 계절별 변화를 평가하기 위해서 크러스컬-월리스 기법(Kruskal-Wallis rank sum test)을 사용하였고 오염원과 유달부하량 사이의 관계를 분석하기 위해서 피어슨 상관분석 기법(Pearson correlation analysis)을 활용하였다. 부하량의 계절 변동성은 타 수질항목 대비 SS, TN, TOC가 유의수준 1% 이내로 높게 나타났다. 상관성분석에서는 수질항목별로 차이를 보였으나 거주인구와 하수처리장 방류량이 가장 높은 양의 상관계수를 보였으며 이러한 경향성은 하천유량이 적은 봄철과 겨울철에 더 높은 유의성을 나타냈다. 유역내 수질 향상을 위해서는 2012년부터 실시되고 있는 오염총량관리제도와 같은 유역관리제도의 유지 및 하수처리시설과 산업폐수처리시설로부터의 배출수의 적절한 관리가 필요할 것으로 판단된다.

Keywords

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