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

O. Duran, M.V.N. Silva, L.J.C. Bezerra, H.J. Hermann, L.P. Maia

Research output: Contribution to journalArticleAcademicpeer-review

38 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)460-471
Number of pages12
JournalGeomorphology
Volume102
Issue number3-4
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Coastal morphology
  • Parabolic dunes
  • Dune deactivation

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