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Numerical modelling of aeolian erosion over rough surfaces

Auteur(s) et Affiliation(s)

TURPIN, C.
Univ. Lille Nord de France, Lille, Douai, France
BADR, T.
Univ. Lille Nord de France, Lille, Douai, France
HARION, J.-L.
Univ. Lille Nord de France, Lille, Douai, France


Description :
Three-dimensional numerical simulations, simulating wind flow over a bed of particles covered by roughness elements, were conducted in order to investigate the effect of roughness elements on the shear stress near the surface. The results confirm that the erosion of soil by wind is strongly attenuated by the presence of roughness elements on the surface and depends on the geometric properties of the roughness elements. Based on the new numerical results obtained, a refinement of existing theoretical approaches is developed to describe the dependence of the friction velocity upon roughness frontal area and real exposed cover rate. The new formulation proposed will allow a more accurate evaluation of shear stress partitioning as a function of topographic changes.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 12, p. 1418-1429, nombre de pages : 12, Références bibliographiques : 26 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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