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| Titel |
Size distribution and structure of Barchan dune fields |
| VerfasserIn |
O. Durán, V. Schwämmle, P. G. Lind, H. J. Herrmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 4 ; Nr. 18, no. 4 (2011-07-13), S.455-467 |
| Datensatznummer |
250013941
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| Publikation (Nr.) |
 copernicus.org/npg-18-455-2011.pdf |
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| Zusammenfassung |
| 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. |
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