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|Title:||Destratification induced by bubble plumes|
|Authors:||St. Anthony Falls Hydraulic Laboratory.|
Environmental Laboratory (U.S.)
Water Quality Research Program (U.S.)
Stefan, H. G. (Heinz G.)
Turner, Herman O.
Wilhelms, Steven C.
|Publisher:||Hydraulics Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: Destratification is an alternative for improving the overall quality, particularly dissolved oxygen content, of a stratified reservoir. Pneumatic systems have been used most often for providing the energy needed to destratify a water body. However, there are no means to evaluate the long-tenn operation of a destratification system. Under contract, the St. Anthony Falls Hydraulic Laboratory, University of Minnesota, developed a subroutine entitled "BUBBLES" that simulates the destratification of a lake or reservoir by an air bubble diffuser. This subroutine was added to CE-THERM-R1 and used to account for mixing that occurs in a lake or reservoir caused by a pneumatic destratification system. CE-THERM-R1 contains the thermal analysis portion of CE-QUAL-R1 and is used to simulate the water and heat budgets of a water body. This report describes the development of BUBBLES and its incorporation into CE-THERM-R1. In BUBBLES, the reservoir is divided into a near field and a far field. The near-field model includes the bubble plume and the flow in its vicinity. The far-field model treats the rest of the reservoir and considers the flow from the plume toward the lake and from the lake toward the plume. The far-field model is coupled with CE-THERM-R1 to simulate water and heat budgets of the water body.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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|TR-W-94-3.pdf||11.92 MB||Adobe PDF|