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http://dx.doi.org/10.17820/eri.2019.6.2.109

Field Applications of Non-powered Downward Water Circulation System to Improve Reservoir Water Quality  

Jang, YeoJu (University of Science and Technology (UST), Smart City & Construction Engineering)
Lim, HyunMan (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Jung, JinHong (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Park, JaeRho (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Kim, WeonJae (Korea Institute of Civil Engineering and Building Technology (KICT), Department of Land, Water and Environment Research)
Publication Information
Ecology and Resilient Infrastructure / v.6, no.2, 2019 , pp. 109-119 More about this Journal
Abstract
Eutrophication has occurred due to the inflow of various water pollutants in many Korean reservoirs with low depth, and algal blooms of surface layer and low oxygenation of deep layer have repeated every year. There are several existing technologies to alleviate the stratification of reservoirs, but it is difficult to apply them in field sites due to the necessity of electric power and low economic efficiency. In this study, a non-powered water circulation system using natural energy of wind and water flow has been developed, and two test-beds constructed in the reservoirs with different conditions and examined its field applicability. Through computational fluid dynamics (CFD) simulation, it has been shown that the water circulation system could induce the downward flow to mitigate the stratification between surface and deep layers, and its influence radius could reach about 30 m. As a result of long-term monitoring of the test-beds, various water quality improvement effects have been observed such as moderation of DO fluctuation by water circulation, reduction of DO supersaturation and prevention of excessive pH rising. In order to improve the applicability of the water circulation system, it is considered necessary to review countermeasures against flood and depth conditions of each reservoir.
Keywords
Eutrophication; Low reservoir; Stratification; Water Circulation; Water Quality Improvement;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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