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Seasonal Variations of Water Quality and Periphyton in the Cheonggyecheon  

Shin, Myoung-Sun (Department of Environmental Science, Kangwon National University)
Kim, Bom-Chul (Department of Environmental Science, Kangwon National University)
Kim, Jai-Ku (Department of Environmental Science, Kangwon National University)
Park, Mi-Suk (Department of Environmental Science, Kangwon National University)
Jung, Seong-Min (Department of Environmental Science, Kangwon National University)
Jang, Chang-Won (Department of Environmental Science, Kangwon National University)
Shin, Yoon-Keun (Department of Environmental engineering, Sangji University)
Bae, Yeon-Jae (Devision of Environmental and Like Sciences, Seoul Women's University)
Publication Information
Abstract
The seasonal variations of water quality and periphyton were investigated in an artificial stream (the Cheonggyecheon Stream) flowing through the Seoul City. TP showed a longitudinal gradient: 10 to $59{\mu}gP\;L^{-1}$ in the upper stream sites, and 15 to $90{\mu}gP\;L^{-1}$ in downstream sites. POP was a major form of TP in the water, occupying over 60%, while the proportion of DIP was less than 10% except for St. 4. N/P atomic ratio ranged from 78 to 554, which implies phosphorus would limit algal growth more than nitrogen. The biomass of periphyton did not show much difference among sites, and it was relatively higher in spring and fall season $(10\sim20{\mu}gChl\;{\alpha}cm^{-2})$ and lower in August $(<5{\mu}gChl\;{\alpha}cm^{-2})$, possibly because biofilms were washed off during spates of summer monsoon. Cyanobacteria was the dominant taxon in the periphyton community throughout the year. The periphyton standing crop can be classified as a nuisance level. It seems that phosphorus level is sufficiently high even though the input water is treated chemically, and modest water velocity $(20\sim90cm\;sec^{-1})$ and rocky bottom provide optimal conditions for periphyton growth.
Keywords
Cheonggyecheon; cyanobacteria; periphyton; water quality;
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Times Cited By KSCI : 5  (Citation Analysis)
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