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Contribution of SAR interferometry (from ERS1/2) in the study of aeolian transport processes : The cases of Niger, Mauritania and Morocco
Bodart, Catherine; Gassani, Jean; Salmon, Marc et al.
2009In Marini, Alberto; Talbi, Mohamed (Eds.) Desertification and risk analysis using high and medium resolution satellite data
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Keywords :
SAR Interferometry; coherence interpretation; active dunes; Sahel
Abstract :
[en] In order to face desertification and sand encroachment of inter dunes depressions, as well as to protect soils in the area of Gouré (Southeast Niger) where it is possible to have food plantations, it is essential to localize the origin and drift of sands. This paper shows that radar satellite remote sensing and interferometry offers the opportunity to gather all the required information. Digital Elevation Models (DEM) generated by interferometry on ERS 1-2 SAR images (a tandem pair acquired on April 25 and 26 1996) helped to collect information on relief and provided an aeolian model, while giving some insight into the spatial distribution of sand formations. Interpreting the interferometric coherent image by means of a color composite allowed detecting and locating sand movements in the areas under study. This project mainly highlights the contribution of SAR interferometry in the study of sand movements by developing added-value products. Interpretations were validated using highresolution satellite data (SPOT 5, IKONOS, and QUICKBIRD) and field observations made during a campaign in Niger in March 2004. The same procedure was also applied in Mauritania using two tandem pairs (2–3 November 1995 and 7–8 December 1995) and in Southern Morocco (18–19 May 1996) in order to identify active dunes in these regions. These observations will be taken into account when analyzing ENVISAT-ASAR data.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Bodart, Catherine ;  Université de Liège - ULiège > Département de géographie > Géomorphologie et télédétection
Gassani, Jean 
Salmon, Marc ;  Université de Liège - ULiège > Département de géographie > Géomorphologie
Ozer, André ;  Université de Liège - ULiège > Département de géographie > Département de géographie
Language :
English
Title :
Contribution of SAR interferometry (from ERS1/2) in the study of aeolian transport processes : The cases of Niger, Mauritania and Morocco
Alternative titles :
[fr] Contribution de l'interférométrie RSO (de ERS1/2) dans l'étude des processus du transport éolien : Les cas du Niger, de la Mauritanie et du Maroc
Publication date :
2009
Main work title :
Desertification and risk analysis using high and medium resolution satellite data
Main work alternative title :
[fr] Désertification et analyse du risque par l'utilisation de données satellitaires de haute et moyenne résolution
Editor :
Marini, Alberto
Talbi, Mohamed
Publisher :
Springer Netherlands, Netherlands
Edition :
1ère édition
ISBN/EAN :
978-1-4020-8936-7
Collection name :
NATO Science for Peace and Security Series C: Environmental Security
Pages :
129-136
Peer reviewed :
Peer reviewed
Funders :
NATO - North Atlantic Treaty Organization [BE]
Available on ORBi :
since 12 March 2010

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