Background: Most lakes have increased concerns about water pollution due to the inflow of non-point sources caused by human activities. Therefore, the lake water quality survey was conducted in order to propose effective plans for water quality management by analyzing the characteristics of lakes and the change of water quality.
METHODS AND RESULTS: In order to investigate the physicochemical water quality in Daedong lake, water quality analysis was undertaken from July 2018 to June 2019. Water temperature was ranged from 7.8 to 34.3℃ and pH varied from 6.9 to 10.2. The concentration of DO, SS, BOD, and COD were 5.6 ~ 17.2 mg/L, 2.4 ~ 35.3 mg/L, and 4.5 ~ 15.1 mg/L, 0.9 ~ 2.8 mg/L, respectively. T-N have ranged from 0.974 ~ 2.126 mg/L, T-P have ranged from 0.014 ~ 0.057 mg/L and Chl-a have ranged from 2.7 ~ 37.9 mg/m3. Through Carlson TSIm assessment using T-P and Chl-a results evaluating trophic state of Daedong lake was evaluated of mesotrophic.
CONCLUSION: Water pollution the management plan needs such as nutrient removal technology and nonpoint source management for prevention of eutrophication in Daedong lake.