Process-form interactions in unstable sand-bed river channels : a numerical modeling approach

Auteur(s) et Affiliation(s)



Description :
A deterministic numerical model of bed deformation and channel widening, which accounts for specific mechanisms of bank erosion and collapse, is used to analyze morphological and flow-energy parameters in adjusting sand-bed channels, for a range of simulated fluvial environments. Simulated channels with a range of assumed boundary-material characteristics were subjected to identical disturbances imposed by reducing the supply of sediment from upstream. The importance of channel widening in controlling and reducing the flow depth of a given discharge and average boundary shear stress is highlighted for the silt- and sand-bank cases.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 1997, vol. 21, n°. 2, p. 85-106, Collation : Illustration, Références bibliographiques : 33 ref.

Date :
1997

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier