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(Article of periodic en Anglais - 2014)

Document title

Assessment of the planimetric morphology of barchan dunes

Authors(s) and Affiliation(s)

MOOSAVI V. (1) ; MORADI H. (1) ; SHAMSI S.R.F. (2) ; SHIRMOHAMMADI B. (1) ;
(1) Dept. of Watershed Management Engineering, Fac. of Natural Resources, Tarbiat Modares Univ., Noor, IRAN, REPUBLIQUE ISLAMIQUE D'
(2) Dept. of Desert Regions Management, College of Agriculture, Univ., Shiraz, IRAN, REPUBLIQUE ISLAMIQUE D'

Abstract

In this study, high resolution images are combined with field measurements in order to quantitatively study the migration and long term changes in the shape and morphology of barchans. The results indicated a power correlation between height and width of barchans. It also indicated that the outline of barchans can approximately be described by a parabola. Besides, the focal length, the curvatures (windward, leeward) and the brink parabola of the barchans were calculated; using differential geometry and mathematical modeling. Surprisingly, there was no significant difference between focal length and mean curvature of barchan parabola from 2001 to 2011. It seems the general shape of the studied barchans has not changed for long periods of time. The minimum and the maximum annual displacements of the barchans were 9 and 22 m, respectively, in the study area. It was also demonstrated that the best morphologic estimators for migration rate of dunes are in this order : width, mean curvature of windward parabola and height, focal length of windward parabola, and length

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2014, vol. 120 [pp. 12-19]

Bibliographic references : 24 ref.

Collation : 8 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.03.017

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681838 : Permanent link - XML version
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