Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Analysis of the Trophic Characteristics of the SoOak River Watershed Using the Korean Trophic State Index

한국형 부영양화지수를 이용한 소옥천 유역의 부영양 특성 분석

  • Park, Jaebeom (Daon Solution Co., Ltd) ;
  • Kal, Byungseok (Daon Solution Co., Ltd) ;
  • Lee, Chulgu (Geum River Environmental Research Center, National Institute of Environment Research) ;
  • Hong, Seonhaw (Geum River Environmental Research Center, National Institute of Environment Research) ;
  • Choi, Moojin (Geum River Environmental Research Center, National Institute of Environment Research) ;
  • Seo, Heeseung (Geum River Environmental Research Center, National Institute of Environment Research)
  • 박재범 ((주)다온솔루션) ;
  • 갈병석 ((주)다온솔루션) ;
  • 이철구 (국립환경과학원 금강물환경연구소) ;
  • 홍선화 (국립환경과학원 금강물환경연구소) ;
  • 최무진 (국립환경과학원 금강물환경연구소) ;
  • 서희승 (국립환경과학원 금강물환경연구소)
  • Received : 2018.10.15
  • Accepted : 2018.10.25
  • Published : 2018.11.30
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Abstract

The Korean Eutrophication Index($TSI_{ko}$) was estimated using water quality monitoring data of eight main sites in the SoOoak River watershed. The environmental characteristics of rivers were classified and evaluated using the $TSI_{ko}$ for each factor calculated by COD, T-P, and Chl-a. There is a good condition for the algae to grow due to shallow water depth, inflow of non-point source pollution during rainfall, influx of sewage treatment effluent and increase of residence time. It shows trophic state more than mesotrophication year round. Especially, in case of Chuso point, which is the inflow point of Daecheong Lake, the water quality deteriorated due to hydraulic characteristics and showed the eutrophic state. Therefore, it is necessary to establish the measures to improve the water quality through the precise monitoring of SoOak River.

소옥천 유역 내 본류 8개 지점의 수질 모니터링 자료를 이용하여 한국형 부영양화지수($TSI_{ko}$)를 산정하고 COD, T-P, Chl-a에 의해 계산된 인자별 $TSI_{ko}$를 이용하여 하천에 대한 환경특성을 분류하고 평가하였다. 소옥천 유역의 경우 수심이 얕고 강우시 비점오염 유입, 하수처리장 방류수 유입, 체류시간 증가 등으로 조류가 성장하기 좋은 조건을 갖추고 있어 연중 중영양 이상의 영양 상태를 보이고 있다. 특히 대청호 유입 지점인 추소 지점의 경우 수리학적 특성으로 인해 수질이 악화되어 부영양 상태를 나타내고 있었다. 따라서 소옥천에 대한 정밀 모니터링을 통해 원인분석과 이에 따른 수질개선대책 수립이 우선적으로 필요할 것으로 판단된다.

Keywords

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Fig. 1. The study area and location of monitoring sites in SoOak river

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Fig. 2. Characteristics of TSIko by the seasons in each station

HKSJBV_2018_v20n4_330_f0003.png 이미지

Fig. 3. Spatial distribution of TSIko by the seasons

HKSJBV_2018_v20n4_330_f0004.png 이미지

Fig. 4. Spatial distribution of TSIko by the parameter

Table 1. Classification of the Korean trophic state index(TSIko)

HKSJBV_2018_v20n4_330_t0001.png 이미지

Table 2. Assessment of trophic status of SoOak river by Korean trophic state index(TSIko)

HKSJBV_2018_v20n4_330_t0002.png 이미지

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