낙동강 8개보 건설이 부영양화에 미치는 영향과 저감방안

Effects of the Weirs in the Nakdong River on Eutrophication and its Reduction Measures

As the storage capacity of water is increased by the constraction of the weirs increased residence time of 18 days and decreased dilution rate of 0.054/day. As the specific growth rate of 1.03/day of Microcystis is 20 fold greater than the dilution rate of 0.054/day of weirs promote eutrophication of the Nakdong River. All of the stations was over eutrophication stage except the Sangju station where concentartion of total phosphorus was not exceeded 0.05 mg/L which is the standard of eutrophication stage in a stationary stream. The reduction measures of eutrophication in the Nakdong River are to open the flood gate of weirs and to reduce the concentration of total phosphorus below 0.05 mg/L.