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Planform dynamics of braided streams

Auteur(s) et Affiliation(s)

BERTOLDI, W.
Dep. of Civil and Environmental Engineering, Univ., Trento, Italie
ZANONI, L.
Dep. of Civil and Environmental Engineering, Univ., Trento, Italie
TUBINO, M.
Dep. of Civil and Environmental Engineering, Univ., Trento, Italie


Description :
This work is aimed at the characterization of the morphology of braided streams, in order to assess whether the system reaches a steady state under constant flow conditions and, in that case, to determine how it can be described and on which parameters it depends. A series of 14 experimental runs were performed in a laboratory physical model with uniform sand, varying the discharge and the longitudinal slope. Planimetric and altimetric configurations were monitored in order to assess the occurence of a steady state. A set of parameters was considered, such as the braid plain width and the number and typology of branches and nodes. Results point out that a relationships exists between braiding morphology and 2 dimensionless parameters, related to total water discharge and stream power. The paper ends with a discussion on different width definitions and on the relationship between width and discharge, that distinctively characterize the braided pattern.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2009, vol. 34, n°. 4, p. 547-557, nombre de pages : 11, Références bibliographiques : 1 p.

Date :
2009

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

Langue :
Anglais
Droits :
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