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KMID : 1171820060210040039
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Journal of Environmental and Sanitary Engineering
2006 Volume.21 No. 4 p.39 ~ p.48
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A study on the correlation between non-point source pollutants from the forest of Juam basin and algae bloom in the Juam lake
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Kim Nam-Jong
Shin Dae-Yewn
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Abstract
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In Juam basin, the ratio of non-point pollution source among pollutant loading of basin was significantly high, since the utilization level of land was high. In addition, the most pollutants were not treated and flowed out. In this study, the correlation between non-point source pollutants from the forest area and increasing algae was investigated.1. Chl-a concentration flowed out to runoff from forest area and stream water was low as 0.1~20.3㎍/ℓ and 0.1~9.3㎍/ℓ, respectively, and chl-a concentration (0.1~28.5 ㎍/ℓ) of branch stream was higher 5~7 times than that of runoff from forest area. 2. In correlation between runoff from forest area and Juam lake water, annual chl-a concentration of area front Juam dam was higher twice than forest area. 3. In runoff from forest area within Juam basin, flagellate, green, diatom and blue algae occupied 33.0~41.7%, 22.2~30.8%, 17.3~22.5% and 13.7~17.6%, respectively. 4. In runoff from forest area, both green and diatom algae were maintained constantly irrespectively of season, and flagellate algae dominated since August. 5. In characteristics by forest tree types, four types algae were inhabited in mixed forest, and flagellate algae were higher in conifer and broadleaf forest than in other area. And green algae in herbaceous forest were higher than other area.
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KEYWORD
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runoff, Juam lake, Algae, nonpoint source
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