Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchans

Details Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchans Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchans

2002-01-08

arxiv.org/abs/cond-mat/0201103v1

Physics

Condensed Matter

submitted to Eur. Phys. J. B, 20 pages, 20 figures

Scientific paper

10.1140/epjb/e2002-00236-4

Almost fifty years of investigations of barchan dunes morphology and dynamics is reviewed, with emphasis on the physical understanding of these objects. The characteristics measured on the field (shape, size, velocity) and the physical problems they rise are presented. Then, we review the dynamical mechanisms explaining the formation and the propagation of dunes. In particular a complete and original approach of the sand transport over a flat sand bed is proposed and discussed. We conclude on open problems by outlining future research directions.

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