Measurements and numerical simulations of the degree of activity and vegetation cover on parabolic dunes in north-eastern Brazil Academic Article

abstract

• In this work we present measurements of vegetation cover over parabolic dunes with different degrees of activation along the north-eastern Brazilian coast. We extend the local values of the vegetation cover density to the whole dune by correlating measurements with the relative brightness index C of high resolution QuickBird panchromatic satellite images of the dune field. We then introduce the vegetation data into a continuous model for vegetated dunes, coupling sand erosion and vegetation growth, and perform simulations of the evolution of the morphology and vegetation cover of parabolic dunes. Finally, from the comparison of both, the measurements and the simulation results, we show that the model is able to predict the dune shape and the vegetation distribution of real parabolic dunes as result of the evolution of a blow-out. 2008 Elsevier B.V. All rights reserved.

authors

• Duran Vinent, Orencio

published proceedings

• GEOMORPHOLOGY

author list (cited authors)

• Duran, O., Silva, M., Bezerra, L., Herrmann, H. J., & Maia, L. P.

citation count

• 46

complete list of authors

• Duran, O||Silva, MVN||Bezerra, LJC||Herrmann, HJ||Maia, LP

publication date

• January 2008

publisher

• Elsevier  Publisher

published in

• Geomorphology  Journal

keywords

• Coastal Morphology
• Dune Dynamics
• Parabolic Dunes
• Vegetation Cover

Digital Object Identifier (DOI)

• 10.1016/j.geomorph.2008.05.011

start page

• 460

end page

• 471

volume

• 102

issue

• 3-4

URL

• http://dx.doi.org/10.1016/j.geomorph.2008.05.011