Journal cover Journal topic
Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.129 IF 1.129
  • IF 5-year value: 1.519 IF 5-year
    1.519
  • CiteScore value: 1.54 CiteScore
    1.54
  • SNIP value: 0.798 SNIP 0.798
  • SJR value: 0.610 SJR 0.610
  • IPP value: 1.41 IPP 1.41
  • h5-index value: 21 h5-index 21
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 48 Scimago H
    index 48
Volume 18, issue 4
Nonlin. Processes Geophys., 18, 455-467, 2011
https://doi.org/10.5194/npg-18-455-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Recent advances in data analysis and modeling of nonlinear...

Nonlin. Processes Geophys., 18, 455-467, 2011
https://doi.org/10.5194/npg-18-455-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 13 Jul 2011

Research article | 13 Jul 2011

Size distribution and structure of Barchan dune fields

O. Durán1, V. Schwämmle2, P. G. Lind3, and H. J. Herrmann4,5 O. Durán et al.
  • 1Laboratoire de Physique et Mécanique des Milieux Hétérogènes, UMR7636, CNRS – ESPCI, 10 rue Vauquelin, 75231 Paris Cedex, France
  • 2Dept. of Biochemistry and Molecular Biology, Univ. of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
  • 3Centro de Física Teórica e Computacional, Faculdade de Ciências da Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1649-003 Lisboa, Portugal
  • 4Computational Physics, IfB, HIF E12, ETH Hönggerberg, Schafmattstr. 6, 8093 Zürich, Switzerland
  • 5Departamento de Física, Universidade Federal do Ceará, 60451-970 Fortaleza, Ceará, Brazil

Abstract. Barchans are isolated mobile dunes often organized in large dune fields. Dune fields seem to present a characteristic dune size and spacing, which suggests a cooperative behavior based on dune interaction. In Duran et al. (2009), we propose that the redistribution of sand by collisions between dunes is a key element for the stability and size selection of barchan dune fields. This approach was based on a mean-field model ignoring the spatial distribution of dune fields. Here, we present a simplified dune field model that includes the spatial evolution of individual dunes as well as their interaction through sand exchange and binary collisions. As a result, the dune field evolves towards a steady state that depends on the boundary conditions. Comparing our results with measurements of Moroccan dune fields, we find that the simulated fields have the same dune size distribution as in real fields but fail to reproduce their homogeneity along the wind direction.

Publications Copernicus
Special issue
Download
Citation
Share