IGB

Connexion

(Article of periodic en Anglais - 2012)

Document title

Chute channel dynamics in large, sand-bed meandering rivers

Authors(s) and Affiliation(s)

GRENFELL M. (1) ; AALTO R. (1) ; NICHOLAS A. (1) ;
(1) Geography, College of Life and Environmental Sciences, Univ., Exeter, ROYAUME-UNI

Abstract

This study applied binary logistic regression analysis to determine whether it is possible to predict chute initiation based on attributes of meander bend character and dynamics. Regression models developed for the Strickland River, Papua New Guinea, the lower Paraguay River, Paraguay/Argentina, and the Beni River, Bolivia, revealed that the probability of chute initiation at a meander bend is a function of the bend extension rate (the rate at which a bend elongates in a direction perpendicular to the valley axis trend). Image analyses of all rivers and field observations from the Strickland suggest that the majority of chute channels form during scroll–slough development. Rapid extension is shown to favour chute initiation by breaking the continuity of point bar deposition and vegetation encroachment at the inner bank, resulting in widely-spaced scrolls with intervening sloughs that are positively aligned with primary over-bar flow.

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no3 [pp. 315-331]

Bibliographic references : 2 p.

Collation : 11 fig., 8 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2257

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
Refdoc record number (ud4) : 26540875 : Permanent link - XML version
Powered by Pxxo