대청댐 역조정지 부근의 수질변화특성 조사

A Survey on the Variation of Water Quality around Daechung-dam Regulating Reservoir

This survey was accomplished to know the characteristics on the variation of water quality around Daechung-dam regulating reservoir. The algae bloom occurres near the chungju and Taejon intake station in autumn every year. It is possible to cause the taste and odor problems in the water supply if this reservoir wilI be a intake station. The comparsions of water quality data between within main dam and around regulating reservoir during past about 5 years were investigated. The water quality of this reservoir was the raw water supply Ⅱ class, but its quality was the raw water supply Ⅲ class while rising severe taste and odor. The Ratio of nitrogen over phosphorus concentration as compared with past 5 years is increasing to be about two times. When the algae bloom occurred, dominant algae species was Aulacoseira glanulata having no correlation with taste and odor.