Linear stability analysis of a 1-D model with dynamical description of bed-load transport

In the paper a linear stability analysis of a one-dimensional morphodynamical model is presented. The local equilibrium assumption on the solid discharge is removed and a dynamical description of the bed-load transport is employed. Both unsteady and quasi-steady flow models are analysed and discusse...

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Bibliographic Details
Published in:Journal of hydraulic research 2006-01, Vol.44 (4), p.480-487
Main Authors: Di Cristo, C., Iervolino, M., Vacca, A.
Format: Article
Language:English
Subjects:
bed-forms
bed-load transport
Earth sciences
Earth, ocean, space
Exact sciences and technology
Hydrology. Hydrogeology
One-dimensional model
stability analysis
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Summary:In the paper a linear stability analysis of a one-dimensional morphodynamical model is presented. The local equilibrium assumption on the solid discharge is removed and a dynamical description of the bed-load transport is employed. Both unsteady and quasi-steady flow models are analysed and discussed. The results reveal the existence, at moderate Froude number values, of perturbations related to bed elevation instability, migrating in the upstream direction both in quasi-steady and full unsteady models.
ISSN:0022-1686
1814-2079
DOI:10.1080/00221686.2006.9521699