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(Article of periodic en Anglais - 2011)

Document title

Morphometric analysis of aeolian bedforms in the Namib Sand Sea using ASTER data

Authors(s) and Affiliation(s)

BULLARD J.E. (1) ; WHITE K. (2) ; LIVINGSTONE I. (3) ;
(1) Dep. of Geography, Univ., Loughborough, ROYAUME-UNI
(2) Dep. of Geography, Univ., Reading, ROYAUME-UNI
(3) School of Science and Technology, Univ., Northampton, ROYAUME-UNI

Abstract

The aim of this paper is to explore the use of ASTER (Advanced Spaceborn Thermal Emission and Reflection Radiometer) elevation data to identify the spatial variation in dune morphometry and sediment thickness across the Namib Sand Sea. The relative accuracy of Global Digital Elevation Model (GDEM) for capturing dune height and shape was tested against multiple individual ASTER DEM scenes and against field surveys, highlighting the smoothing of the dune crest and resultant underestimation of dune height, and the omission of the smallest dunes, because of the 30 m sampling of ASTER DEM products. It is demonstrated that morphometric relationships derived from GDEM data are broadly comparable with relationships derived by previous methods (fieldwork, aerial photography and satellite data), across a range of different dune types

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2011, vol. 36, no11 [pp. 1534-1549]

Bibliographic references : 2 p.

Collation : 12 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2189

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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