EROSION OF VEGETATED COASTAL DUNES

Hydrology and Erosion Impacts of Mining Derived Coastal Sand Dunes,

Chile has an economy strongly based on the exploitation of its natural resources. Copper mining represents the main export monetary income, employing thousands of people all along the country. The Chilean Copper Corporation (CODELCO), El Salvador branch, has been the primary mining company, but it will be ending most of its activities by 201 1 unless copper prices stay at their record levels. B...

Vegetated dunes and barchan dune fields

A simple model for the formation of vegetated dunes

A simple model for the dynamics of dunes associated with vegetation is proposed. Using the model, formation processes of transverse dunes, parabolic dunes and elongated parabolic dunes according to two environmental factors: i)the amount of sand at the source,ii)the wind force, are simulated. The results have qualitative correspondence to the real counterpart, and the simplicity of the algorith...

The coastal dunes of the Lençóis Maranhenses

H. J. Herrmann, E. J. R. Parteli, V. Schwämmle, L. H. U. Monteiro and L. P. Maia. 1. Institut für Computerphysik, ICP, Pfaffenwaldring 27, 70569 Stuttgart, Germany. 2. Departamento de Fı́sica, Universidade Federal do Ceará, 60455-970, Fortaleza, CE, Brazil. 3. Instituto de Fı́sica Teórica, Universidade Federal Fluminense, 24210, Niterói, RJ, Brazil. 4. LABOMAR, Av. Abolição, 3207, Meireles, 60165...

Seasonal erosion and restoration of Mars' northern polar dunes.

Despite radically different environmental conditions, terrestrial and martian dunes bear a strong resemblance, indicating that the basic processes of saltation and grainfall (sand avalanching down the dune slipface) operate on both worlds. Here, we show that martian dunes are subject to an additional modification process not found on Earth: springtime sublimation of Mars' CO(2) seasonal polar c...