Vegetation against dune mobility

Abstract

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.

4 pages, 4 figures. Accepted in Physical Review Letters

References in corpus (2)

• A Continuum Saltation Model for Sand Dunes
• Minimal Model for Sand Dunes

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