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KMID : 1024520000090040275
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Journal of the Environmental Sciences
2000 Volume.9 No. 4 p.275 ~ p.284
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The study on water quality and phytoplankton flora at 3 rivers in the Taejon city
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Kang Chang-Min
Lee Sang-Myong
Um Jun-Sik
Lee Jung-Hee
Lee Ho-Won
Hong Chun-Po
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Abstract
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The studyies on physico-chemical factors and phytoplankton at the 3 rivers in the Taejon city were conducted from November 1997 to May 1998. The Results were as floows; In the water quality, the down streams were generally worse than the upper streams. Water temperature was varied from 2.4 to 23.; DO from 1.80mg/ to 17.6mg/ ; pH from 4.7 to 10.4 ; BOD from 0.78mg/ to 8.80mg/ ; COD from 0.32mg/ to 8.26mg/ ; SS from 2.0mg/ to 43.0mg/ ; total phosphate was from 0.001mg/ to 0.709mg/ ; total nitrogen 0.01mg/ to 11.69mg/. In phytoplankton species, they were identified as total 191 taxa composed of 8 classes, 18 orders, 35 families, 74 genera, 152 species, 35 varieties and 4 forms. The dominant species were Synedra ulna in Taejon-chon, Diatomavulgare in Yudong-chon, Oscillatioria princeps, Scenedesmus qadricauda, Synedra ulna, and Diatom vulgare in Gap-chon. Standing crops of phytoplankton were from 2,076 cells/ to 97,356 cells/
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KEYWORD
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algae flora, Gap-chon, phytoplankton, Taejon-chon, Yudong-chon, water quality
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