Gas transfer at weirs using the hydrocarbon gas tracer method with headspace analysis

John R. Thene, John S Gulliver

Research output: Chapter in Book/Report/Conference proceedingChapter

2 Scopus citations

Abstract

The gas transfer which occurs at hydraulic structures is the subject of this thesis. Attempts which have been made to predict the reaeration which occurs at the base of a free overfall or weir are reviewed. Because of the uncertainties involved in the prediction and measurement of oxygen transfer at hydraulic structures, a hydrocarbon gas tracer method, previously used for the measurement of open channel reaeration, was adapted to hydraulic structures. A simple headspace gas chromatographic technique was applied to the measurement of two dissolved light hydrocarbon tracer gases: propane, a gas that is nearly biologically inert and commercially available, and naturally occurring methane, which is proposed as a tracer gas for use at hydraulic structures. A detailed uncertainty analysis was performed on the measurement technique. Laboratory gas transfer measurements were made at a field-scale weir. The results from the injected propane measurement had a low uncertainty and compared favorably with the predictive equations available.

Original languageEnglish (US)
Title of host publicationProject Report - University of Minnesota, St. Anthony Falls Hydraulic Laboratory
Pagesvar paging
Edition273
StatePublished - Jan 1 1989

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    Thene, J. R., & Gulliver, J. S. (1989). Gas transfer at weirs using the hydrocarbon gas tracer method with headspace analysis. In Project Report - University of Minnesota, St. Anthony Falls Hydraulic Laboratory (273 ed., pp. var paging)