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(Article of periodic en Anglais - 2011)

Document title

A new framework for modeling the migration of meandering rivers

Authors(s) and Affiliation(s)

PARKER G. (1) ; SHIMIZU Y. (2) ; WILKERSON G.V. (3) ; EKE E.C. (1) ; ABAD J.D. (4) ; LAUER J.W. (5) ; PAOLA C. (6) ; DIETRICH W.E. (7) ; VOLLERS V.R. (8) ;
(1) Department of Civil & Environmental Engineering and Department of Geology,, Southern Illinois University, Urbana, ETATS-UNIS
(2) Laboratory of Hydraulic Research, Graduate School of Engineering, Hokkaido University, Sapporo, JAPON
(3) Department of Civil & Environmental Engineering, Southern Illinois University, Carbondale, ETATS-UNIS
(4) Department of Civil & Environmental Engineering, University of Illinois, Urbana, ETATS-UNIS
(5) Department of Civil & Environmental Engineering, Seattle University,, Seattle, ETATS-UNIS
(6) Department of Geology & Geophysics and St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, ETATS-UNIS
(7) Department of Earth and Planetary Science, University of California, Berkeley, ETATS-UNIS
(8) Department of Civil Engineering and St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, ETATS-UNIS

Abstract

Here a new model is presented, in which separate relations are developed for the migration of the eroding bank and the depositing bank. It is assumed that the eroding bank consists of a layer of fine-grained sediment that is cohesive and/or densely riddled with roots, underlain by a purely noncohesive layer of sand and/or gravel. Following erosion of the noncohesive layer, the cohesive layer fails in the form of slump blocks, which armor the noncohesive layer and thereby moderate the erosion rate. Separate equations describing the migration of the eroding and depositing banks are tied to a standard morphodynamic formulation for the evolution of the flow and bed in the central region of the channel. The model allows for both (a) migration for which erosion widens the channel, forcing deposition at the opposite bank, and (b) migration for which deposition narrows the channel forcing erosion at the opposite bank

Source

Article of periodic

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

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

Millesime : 2011, vol. 36, no1 [pp. 70-86]

Bibliographic references : 2,5 p.

Collation : 11 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2113

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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