标题：Recent advances in the study of the evolution of sand dunes using combined military and civilian satellite imageries: The case of the Tafilalet (Morocco)
期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2005
卷号：16
期号：3
页码：153-164
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Robert Desjardins , Pierre Rognon , Mansour Benalla , El Medhi Alem Université du Québec à Montréal, Département de géographie, BP 8888, Succursale Centre-ville, Montréal, QC, Canada H3C 3P8, Université Pierre et Marie Curie, Case 114, 4, place Jussieu, 75252 Paris cedex 05, France, Université Mohammed V-Agdal, Faculté des sciences, Département des sciences de la terre, Avenue Ibn Batouta, BP 1014, Rabat RP, Maroc Key words: Satellite imaging and geomatics, Sanding, Marocco Page(s) : 153-64 Published in: 2005 Progress of sanding over for some palm groves in the southeastern part of Morocco has been studied in 1999 with the help of 2 SPOT imageries acquired in 1986 and 1995. Recently, images from military satellites (acquired between 1963 and 1980) and an ASTER imagery (2003) enriched our data so that we can now analyse the phenomena over a period of 40 years. The spatial resolution of these imageries is fine enough, not only for measuring orientation and displacement of dunes, but also for a better understanding the dynamic of sanding over for the area studied (Hannabou sector, Tafilalet). Digital image processing, combined with good spatial resolution permitted us to have more robust measures concerning these orientation and displacements. In fact, winds coming mostly from the SW (locally named Saheli wind) generated an average displacement of about 15m/year in the NE direction. Furthermore, this study helped us emphasize the local origin of sands in forming dunes in this area.
关键词：Satellite imaging and geomatics; Sanding; Marocco
