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(Article of periodic en Anglais - 2011)

Document title

Cellular model for sand dunes with saltation, avalanche and strong erosion : collisional simulation of barchans

Authors(s) and Affiliation(s)

KATSUKI A. (1 2 3) ; KIKUCHI M. (3 2) ; NISHIMORI H. (4) ; ENDO N. (5) ; TANIGUCHI K. (6) ;
(1) College of Science and Technology, Nihon Univ., JAPON
(2) Dep. of Physics, Osaka Univ., Toyonaka, JAPON
(3) Cybermedia Center, Osaka Univ., Toyonaka, JAPON
(4) Dep. of Mathematical and Life Sciences, Univ., Hiroshima, JAPON
(5) Dep. of Earth Sciences, Univ., Kanazawa, JAPON
(6) Dep. of Earth and Space Sciences, Osaka Univ., Toyonaka, JAPON

Abstract

From the flume experiment,4 distinguishable types of collision patterns between 2 barchans have been observed: coalescence, ejection, split and reorganization. The AA. have proposed a simple cellular model for numerical simulations of dune dynamics, in which saltation and avalanche are elementary processes. In this paper, they first describe this model in detail. The model reproduces 3 types of collision patterns: coalescence, ejection, and reorganization. They then present a strong-erosion model which successfully reproduces all the collision patterns. Thus, 3 elementary processes (saltation, avalanche and strong-erosion) are sufficient for a phenomenological description of the interaction dynamics of aqueous barchans. It is also shown that the type of collision is determined by competition between the filling-up of the interdune between 2 barchans and the change in height of each dune

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, no3 [pp. 372-382]

Bibliographic references : 51 ref.

Collation : 15 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2049

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