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(Article of periodic en Anglais - 2010)

Document title

A continuous model for sand dunes : review, new developments and application to barchan dunes and barchan dune fields

Authors(s) and Affiliation(s)

DURÁN O. (1) ; PARTELI E.J.R. (2) ; HERRMANN H.J. (3 4) ;
(1) Lab. de Physique et Mécanique des Milieux Hétérogènes, (CNRS UMR 7636) ESPCI, Paris, FRANCE
(2) Programma de Pós-Graduação em Engenharia Química, Univ., Ceará, BRESIL
(3) Computational Physics, IfB, HIF E12, ETH Hönggerberg, Zürich, SUISSE
(4) Dep. de Física, Univ., Ceará, BRESIL

Abstract

The AA. present an updated review of such a model for aeolian dunes, including important modifications to improve its predicting power. For instance, they add a more realistic wind model and provide a self-consistent set of parameters independently validated and able to simulate realistic barchan dunes, which are the basic solution of the model in the condition of unidirectional flow and scarce sediments. From the simulation, the AA. extract new relations describing the morphology and dynamics of barchans that compare very well with existing field data. Next, the AA. revisit the problem of the stability of barchan dunes and argue that they are intrinsically unstable bed-forms. Finally, the AA. perform more complex simulations : first, a barchan dune under variable wind strength and, second, barchan dune fields under different boundary conditions. The latter has important implications for the problem of the genesis of barchan dunes

Source

Article of periodic

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

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

Millesime : 2010, vol. 35, no13 [pp. 1591-1600]

Bibliographic references : 26 ref.

Collation : 14 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2070

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