Abstract
An artificial lake has many dead water zones incurred by the limitation of discharge supply and the low velocity of running water. This study aims to suggest an operation scheme that can enhance the water cycle and provide a solution to dead water regions. For this, the study, using MIKE 21 FM model, analyzed the water level, velocity and water exchange rate of Cheongna Central Lake that change according to the operation conditions such as the use of flow generator, drainage location and discharge supply condition. Regardless of the discharge supply and drainage conditions, operating the flow generator increased the average velocity of running water by more than 4 times throughout the entire lake, while removing maximum 35% of the whole dead water zone. The study indicates that the operation of flow generator is crucial in removing the dead water zones in a short term as the water exchange rate was lower than 60% when the flow generator did not operate.
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