Measurement of Upwelling Flow from Air Diffuser
Publication: Journal of Environmental Engineering
Volume 115, Issue 6
Abstract
A field test is performed to determine the upwelling flow from a 20-m deep air diffuser operating in Upper Bear Creek reservoir in northern Alabama. Dye is injected at a constant rate from a 6-m long diffuser pipe directly above the 12-m long air diffuser. Dye concentrations and velocities are measured in the flow-away current to estimate the total upwelling flow. The field estimate is compared to equations from the literature. The measured Upper Bear Creek diffuser upwelling flow is consistent with these equations for the normal air flow rate of 0.012 m3/sec. The dye and velocity measurements indicate an upwelling flow of 12 m3/sec and 10 m3/sec, respectively. A second test with an air flow rate of 0.024 m3/sec indicates an upwelling flow of 18 m3/sec from the dye dilution and 13 m3/sec from the velocities.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 115 • Issue 6 • December 1989
Pages: 1269 - 1275
Copyright
Copyright © 1989 ASCE.
History
Published online: Dec 1, 1989
Published in print: Dec 1989
Authors
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