Research Article
Feb 1977
Predicting Dispersion Coefficient of Streams
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VIEW THE REPLYPublication: Journal of the Environmental Engineering Division
Volume 103, Issue 1
Abstract
Using inspectional analysis, a simple formula has been derived which relates the longitudinal dispersion coefficient of natural streams to several bulk flow properties such as the discharge and the hydraulic radius. It is shown that the dimensionless factor, β, of the formula, unlike the dimensionless dispersion coefficient α based on Elder's equation, is independent of the size of natural streams. An analysis of existing data indicates that the value of β for any stream may be predicted within a factor of six from the frictional or resistance factor of the stream. This means the proposed equation for predicting longitudinal dispersion is more accurate than any existing method based on bulk flow properties.
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Published In
Journal of the Environmental Engineering Division
Volume 103 • Issue 1 • February 1977
Pages: 59 - 69
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Feb 1977
Published online: Feb 11, 2021
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Authors
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Henry Liu, M.ASCE
Assoc. Prof. of Civ. Engrg.; Univ. of Missouri, Columbia, Mo.
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