Do alternate bars affect sediment transport and flow resistance in gravel-bed rivers ?

Auteur(s) et Affiliation(s)

FRANCALANCI, S.

CERAFRI - Center of Research and Advanced Education for Hydrogeological Risk Prevention, Retignano di Stazzema, Italie

SOLARI, L.

Dep. of Civil and Environmental Engineering, Univ., Firenze, Italie

TOFFOLON, M.

Dep. of Civil and Environmental Engineering, Univ., Trento, Italie

PARKER, G.

Dep. of Civil and Environmental Engineering and Dep. of Geology, Univ. of Illinois, Urbana, Etats-Unis

Description :
The aim of this work is to quantify whether and how the presence of a complex three-dimensional (3D) morphology due to alternate bars in a straight channel may generate an additional contribution to total drag resistance and sediment transport, as compared to the equivalent one-dimensional (1D) case of a flat and straight bed, having the same channel slope and average flow velocity. The calculations result in a method for correcting 1D models to account for the total sediment transport and resistance in a cross-section due to 3D effects of alternate bars. The AA. term the resulting relations morphologically averaged sediment transport and resistance equations.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 8, p. 866-875, nombre de pages : 10, Références bibliographiques : 28 ref.

Date :
2012

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

Langue :
Anglais