A rational sediment transport scaling relation based on dimensionless stream power

Auteur(s) et Affiliation(s)



Description :
The AA. derive a scaling relation that describes how externally imposed changes in either magnitude of sediment load or available discharge can be accommodated by changes in the channel configuration, described by the energy gradient, mean flow depth, characteristic grain size and a parameter describing the effect of bed surface structures on grain entrainment. Therefore they derived an empirical transport function relation relating E to dimensionless stream power using data from a wide range of stable, bed load-dominated channels: the form of that transport function is based on the understanding that, while grain entrainment is related to the forces acting on the bed (described by dimensionless shear stress), sediment transport rate is related to the transfer of momentum from the fluid to the bed material (described by dimensionless stream power).


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 7, p. 901-910, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2011

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley