Relation between flow, surface-layer armoring and sediment transport in gravel-bed rivers

Auteur(s) et Affiliation(s)



Description :
This study investigates trends in bed surface and substrate grain sizes in relation to reach-scale hydraulics using data from more than 100 gravel-bed stream reaches in Colorado and Utah. Collocated measurements of surface and substrate sediment, bankfull channel geometry and channel slope are used to examine relations between reach-average shear stress and bed sediment grain size. The results of the developed transport model suggest that downstream trends in total bed load flux may vary appreciably, depending on the assumed relation between surface and substrate grain sizes.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 8, p. 1192-1209, nombre de pages : 18, Références bibliographiques : 45 ref.

Date :
2008

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