Field Calibration of Stream‐Tube Dispersion Model
Publication: Journal of Hydraulic Engineering
Volume 109, Issue 11
Abstract
A stream‐tube dispersion model used in an engineering study has been calibrated using on‐site dye measurements. The feasibility of model construction using non‐specialized data is demonstrated through detailed description of the study area and its discretization. The model was used to plan a field study in which measurements of tracer diffusion from a continuous source were supplemented by detailed velocity and depth observations. After a preliminary calibration of bed roughness to reproduce observed velocities, transverse mixing coefficients were adjusted to obtain good reproduction of the tracer measurements. The adjusted nondimensional coefficients are so large as to suggest that secondary currents play an important role in transverse mixing, weakening the generality of the calibration and pointing out the need to account for secondary circulation explicitly.
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Published In
Journal of Hydraulic Engineering
Volume 109 • Issue 11 • November 1983
Pages: 1455 - 1470
Copyright
Copyright © 1983 ASCE.
History
Published online: Nov 1, 1983
Published in print: Nov 1983
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