Hydraulic Estimation of Dispersion Coefficient for Streams
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 3
Abstract
Inclusion of longitudinal dispersion enhances realism in the assessment of transport in streams by accounting for contaminant mixing. Here we revisit the problem of estimating the longitudinal dispersion coefficient D from readily measurable bulk hydraulic variables, which is useful in applications. We develop and calibrate, through field testing, a predictor for the longitudinal dispersion coefficient for streams that is structured after the fundamental formula of G. I. Taylor. Comparison of predicted with observed values of D shows the new optimized formula providing closer estimates than the established formula of Fischer, with respect to both mean accuracy and deviations from the mean, achieving in 14 of the 24 cases studied predictive accuracy of 0.5 ≤Dobserved/Dpredicted≤ 2.
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References
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 124 • Issue 3 • March 1998
Pages: 317 - 320
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Mar 1, 1998
Published in print: Mar 1998
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