Lake Destratification by Bubble‐Plume Systems: Design Methodology
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 3
Abstract
Thermal stratification during summer may result in lowered dissolved‐oxygen levels below the thermocline of lakes and reservoirs. To avoid further deterioration of water quality, artificial destratification has long been practiced. This paper presents a totally new design methodology for the design of bubble‐plume destratification systems. It is based on the interaction that occurs between a buoyant bubble plume and the density stratified water column through which it rises. Two dimensionless parameters, and , universally describe the behavior of such plumes. represents the bubble source strength compared to the total pressure head, and represents the effect of the stratification compared to the bubble source strength. By selecting appropriate values for these parameters, the individual bubble plumes can be designed to operate within high‐efficiency bands. The number of such plumes that are required to destratify the lake can then be calculated by a simple energy balance. The method is validated using a combination of a dynamic reservoir simulation model (DYRESM) and a bubble‐plume model. Comparison of the design recommendations with those produced from conventional practice suggest that large cost savings may be realized.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 3 • March 1993
Pages: 350 - 368
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Dec 23, 1991
Published online: Mar 1, 1993
Published in print: Mar 1993
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