Research Article
Jul 1977
Analytical Model of Dispersion in Tidal Fjords
Authors: Shu T. Wang, Bih H. Chen, and Alan F. McMillanAuthor Affiliations
Publication: Journal of the Hydraulics Division
Volume 103, Issue 7
Abstract
Using the integral transforms technique, the unsteady three-dimensional advective-diffusion equation was solved analytically for the dispersion of pollutants from an instantaneous point source in open channels of finite width. The flow velocity through the channel was the mean current velocity which was assumed to vary sinusoidally with time but linearly with water depth. The effect of first-order reactions is to reduce the concentration level throughout the channel. The spread of pollutants in the direction of mean flow is accelerated as a result of the existence of a vertical shear. The width of the channel is important, as is the boundary in the y direction that profoundly affects the horizontal dispersion when the source is close to the bank, but its effect diminishes as the source is moving farther away from the bank. These findings, as well as others, are examined and illustrated graphically.
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Published In
Journal of the Hydraulics Division
Volume 103 • Issue 7 • July 1977
Pages: 737 - 751
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Jul 1977
Published online: Feb 3, 2021
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Authors
Affiliations
Shu T. Wang
Research Assoc., Nova Scotia Technical Coll., Dept. of Chemical Engrg., Halifax, Nova Scotia, Canada
Bih H. Chen
Assoc. Prof., Nova Scotia Technical Coll., Dept. of Chemical Engrg., Halifax, Nova Scotia, Canada
Alan F. McMillan
Prof., Nova Scotia Technical Coll., Dept. of Chemical Engrg., Halifax, Nova Scotia, Canada
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