Size distribution and structure of Barchan dune fields

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ID: 63513
2011
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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.
Reference Key
duran2011sizenonlinear Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Durán, O.;Schwämmle, V.;Lind, P. G.;Herrmann, H. J.;
Journal nonlinear processes in geophysics
Year 2011
DOI
DOI not found
URL
http://www.nonlin-processes-geophys.net/18/455/2011/npg-18-455-2011.pdf
Keywords
Science physics general. including nature conservation, geographical distribution geophysics. cosmic physics cosmic physics sciencephysicsgeophysics

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