낙동강의 남조류 대량발생 요인분석

Abstract

Cyanobacteria bloom has occurred in Nakdong river in summer after constructing 8 weirs. Research on controling cyanobacteria bloom is essential to solve problem such as risk to drinking water. The purpose of this study is to speculate that cyanobacteria bloom factor in 2013 is associated with environmental constituents. In case of nutrients, high concentration had commonly been showed near Dalseong weir where Geumho river meets Nakdong river and decreased while moving towards Changnyeong-Haman weir where as the cyanobacteria populations increased only during August. The correlation coefficient of the temperature and cyanobacteria populations were high in Changnyeong -Haman weir. In the component analysis, Changnyeong-Haman weir applied it to describe the component in relation to air temperature, water temperature, pH, DO and cyanobacteria populations. Thus it can be concluded that cyanobacteria bloom increased due to increased water temperature caused by seasonal factor during August.