• Korean Journal of Ecology and Environment
• /
• v.44 no.2
• /
• pp.155-171
• /
• 2011

The research assessed water quality using physico-chemical factors, trophic status index and attached diatom index in 10 reservoirs located in Chungcheongnam-do from October 2007 to June 2008. The physico-chemical water quality assessments revealed that Dangjin-gun (St. 1~5), which displayed a high chemical oxygen demand (V and VI) and chlorophyll-${\alpha}$ (Eutrophic-Hypereutrophic), was more polluted than Yesan and Cheongyang-gun. The sample were also hypereutrophic [trophic status index (TSI) 74.6] and ${\beta}$-mesosaprobic [diatom assemblage index to the organic water pollution (DAIpo) 44.47]. Yesan and Cheongyang-gun. Which were mid-level in their pollution status, were eutrophic (TSI 56.9) and ${\alpha}$-oligosaprobic (DAIpo 60.11). TSI correlated strongly with the attached diatom index (of DAIpo 0.60~0.62, and trophic diatom index of 0.72~0.74). Hence, the attached diatom index can be used with the trophic status assessment of lakes using TSI, and lake trophic status index (LTSI).

• Korean Journal of Ecology and Environment
• /
• v.34 no.3 s.95
• /
• pp.199-205
• /
• 2001

This study was investigated to the assessment of organic pollution using attached diatom assemblages in the Shinchon stream on April, June, September and December 1999. Diatoms were identified total 74 taxa which composed of 68 species, 4 varieties and 2 unidentified species. The Centrales were 5 taxa and Pennales were 69 taxa. Dominant species were Navicula subminuscula, Navicula saprophila and Nitzschia palea which were saprophilous taxa to organic pollution. N. palea was dominant species at st. $1{\sim}3$ on April, June and September and N. subminuscula was recorded as dominant species at st. 4 on June, September and December. N. saprophila was dominated only at station 4 on April. DAIpo values were ranged $0.4{\sim}15.3$ at all stations from April to December and the water qualities were polysaprobic states except to ${\alpha}-mesosaprobic$ state at st. 1 on June. If Navicula sp. was identified as saprophilous taxa, DAIpo value of this station will be 3.5 and water quality of the station will be polysaprobic state. This stream was assessed the water qualities of polysaprobic states.