• Title/Summary/Keyword: 환경보건

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Seasonal Variation of Water Quality and Cryptomonads Distribution in Oncheon River (온천천내 수질 및 Cryptomonads 분포의 시기별 변화)

  • Jeong, Tae-Uk;Jeong, Sun-Young;Kim, Min-Jeong;Choi, Yoo-Jeong;Cho, Eun-Jeong;Jeong, Jae-Eun;Seo, Dong-Cheol;Park, Jong-Hwan
    • Korean Journal of Environmental Agriculture
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    • v.41 no.3
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    • pp.177-184
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    • 2022

  • BACKGROUND: Recently, the inflow of nonpoint pollutants into rivers caused by rapid urban and industrialization promotes the proliferation of algae, which causes eutrophication of rivers. This study was conducted to evaluate the seasonal variation of water quality characteristics and cryptomonads growth in the Oncheon River. METHODS AND RESULTS: The water quality and distribution characteristics of cryptomonads in the Oncheon River were investigated monthly for 12 months from January 2021. The cell number of cryptomonads was intensively developed in January-April, and it decreased sharply in the summer with heavy rainfall. In particular, cryptomonads moved to the downstream side of the river depending on the time, and as a result, significant differences were shown for each investigation point. The Korean trophic state index (TsiKO) in Oncheon River was classified as eutrophy all year round, indicating that cryptomonads can grow year-round. Distribution characteristics of cryptomonads in Oncheon River showed high correlations with DO (r=0.678), BOD (r=0.826) and chlorophyll-a (r=0.613) in water. CONCLUSION(S): In order to reduce cryptomonads in the Oncheon River, it is judged that a complex countermeasure considering the residence time, insolation and precipitation along with water quality factors is required.

  • https://doi.org/10.5338/KJEA.2022.41.3.21 인용 PDF KSCI