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

被引：43

作者：

Duran, O. ^{[1
,6
]}

Silva, M. V. N. ^{[2
]}

Bezerra, L. J. C. ^{[3
]}

Herrmann, H. J. ^{[4
,5
]}

Maia, L. P. ^{[3
]}

机构：

[1] Univ Stuttgart, Inst Computat Phys, D-70569 Stuttgart, Germany

[2] Univ Fed Pernambuco, Dept Geos, BR-50670901 Recife, PE, Brazil

[3] Univ Fed Ceara, Dept Geol, BR-60455970 Fortaleza, Ceara, Brazil

[4] ETH Honggerberg, IFB, HIF E12, CH-8093 Zurich, Switzerland

[5] Univ Fed Ceara, Dept Fis, BR-60451970 Fortaleza, Ceara, Brazil

[6] Univ Twente, TS, NL-7500 AE Enschede, Netherlands

来源：

GEOMORPHOLOGY | 2008年 / 102卷 / 3-4期

关键词：

Coastal morphology; Vegetation cover; Parabolic dunes; Dune dynamics;

D O I：

10.1016/j.geomorph.2008.05.011

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

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 held. 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. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：460 / 471

页数：12

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