Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Risk assessment for water quality of a river using QUAL2E model

QUAL2E 모형을 이용한 하천수질의 위해성평가

  • Kim, Jungwook (Department of Civil Engineering, Inha University) ;
  • Kim, Yonsoo (Department of Civil Engineering, Inha University) ;
  • Kang, Narae (Department of Civil Engineering, Inha University) ;
  • Jung, Jaewon (Department of Civil Engineering, Inha University) ;
  • Kim, Soojun (Columbia Water Center, Columbia University) ;
  • Noh, Huiseong (Department of Civil Engineering, Inha University) ;
  • Kim, Hung Soo (Department of Civil Engineering, Inha University)
  • 김정욱 (인하대학교 사회인프라공학과) ;
  • 김연수 (인하대학교 사회인프라공학과) ;
  • 강나래 (인하대학교 사회인프라공학과) ;
  • 정재원 (인하대학교 사회인프라공학과) ;
  • 김수전 (컬럼비아대학교 Columbia Water Center) ;
  • 노희성 (인하대학교 사회인프라공학과) ;
  • 김형수 (인하대학교 사회인프라공학과)
  • Received : 2014.05.22
  • Accepted : 2014.08.20
  • Published : 2014.08.31
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Abstract

In this study, we consider ability of self-purification for a rational water quality management. And we assess the risk of Alkyl Benzene Sulfonic acid sodium salt(ABS) of harmful ingredients in Anseong Cheon watershed using QUAL2E model. The observations and simulated results were fitted well for BOD and ABS, but even though the trend of DO concentration change was well represented, the error between observation and simulation values was existed. We assessed the Risk assessment by calculating Risk quotient(RQ) by Predicted Exposure Concentration(PEC) and Predicted No-Effect Concentration(PNEC). Results of the impact of ABS on the self-purification of the river were Anseongcheon[0.0003(Bressan), 0.06(Criteria of Ministry of environment)], Jinwicheon[0.0002(Bressan), 0.04(Criteria of Ministry of environment). And result of the impact of ABS on the Aquatic ecosystem of the river were Anseongcheon[0.0667(Bressan), 0.005(Criteria of Ministry of environment)], Jinwicheon[0.1(Bressan), 0.0075(Criteria of Ministry of environment). All of these results were smaller than the 1.0 which is the reference value suggested by Norification No.30 of the National Institute of Environment Research. So, ABS did not affect a self-purification and aquatic ecosystem of the river. The method suggested in the study is a simple one and can provide more information for harmful ingredients than criteria of Ministry of environment.

본 연구에서는 합리적인 수질관리를 위해서 하천의 자정능력을 고려하여 안성천 유역 내 유해성분 중 ABS(음이온 계면활성제)성분에 대해서 QUAL2E모형을 이용하여 위해성평가를 실시하였다. 수질모의결과 안성천과 진위천에서 BOD, ABS의 실측치와 예측치가 비교적 잘 일치함을 보여주고 있으며, DO에 대해서는 예측값과 실측값 사이에 오차가 발생하지만 농도변화의 추이는 잘 나타내고 있었다. 위해성지수는 오염물질의 예상 노출농도(PEC)와 하천수질에 영향을 주지 않는 예상무영향농도(PNEC)를 통해 계산하였고 위해성 비를 산정하여 위해성 지수를 평가하였다. ABS가 하천의 자정작용에 미치는 영향 분석 결과는 안성천[0.0003(Bressan), 0.06(환경부기준)], 진위천[0.0002(Bressan), 0.04(환경부기준)], ABS가 하천의 수생생태계에 미치는 영향에 대한 분석 결과는 안성천[0.0667(Bressan), 0.005(환경부기준)], 진위천[0.1(Bressan), 0.0075(환경부기준)]으로 국립환경과학원고시 제2012-30호에서 제시되어 있는 위해성이 있다고 판단되는 위해성 비의 기준치 값 1보다 작아 하천의 자정능력과 하천의 수생생태계에 영향을 주지 않은 것으로 분석되었다. 본 연구에서 적용된 방법은 간단하며 현재 환경부 수질기준보다 상세히 유해성분에 대한 정보를 줄 수 있다고 판단된다.

Keywords

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