Vegetation against dune mobility

Details Vegetation against dune mobility Vegetation against dune mobility

2006-09-12

arxiv.org/abs/cond-mat/0609277v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures. Accepted in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.188001

Vegetation is the most common and most reliable stabilizer of loose soil or sand. This ancient technique is for the first time cast into a set of equations of motion describing the competition between aeolian sand transport and vegetation growth. Our set of equations is then applied to study quantitatively the transition between barchans and parabolic dunes driven by the dimensionless fixation index $\theta$ which is the ratio between dune characteristic erosion rate and vegetation growth velocity. We find a fixation index $\theta_c$ below which the dunes are stabilized characterized by scaling laws.

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