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：2009
卷号：20
期号：4
页码：333-337
DOI：10.1684/sec.2009.0205
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Abdellatif Tribak , Abdelkader El Garouani , Mohamed Abahrour Laboratoire d’analyse géoenvironnementales et d’aménagement (LAGEA) Faculté des lettres et sciences humaines Route d’Imouzzer BP 59 Fès Maroc, Laboratoire de géosciences et environnement Faculté des sciences et techniques de Fès BP 2202 Route d’Imouzzer Fès Maroc Key words: cartography, GIS, Morocco, water erosion DOI : 10.1684/sec.2009.0205 Page(s) : 333-7 Published in: 2009 The area of the Eastern PreRrif under question is prone to very intense erosive dynamics related to an overlap of natural and human factors. The complexity of the structure, characterized by the prevalence of overthrust, marks the area by a dissected relief and steep slopes. Tender lithological families prevail. Almost all of the region is occupied by tertiary marly series. The area is subjected to constraining climatic conditions marked by strong seasonal contrasts with aggressive and concentrated rain. Old and strong human influences are at the origin of a quasi-total eradication of the natural vegetation to the advantage of agrarian conquest. Annual crops cover both the weak and strong slopes. The erosional processes are very varied and the soil losses remain, consequently, enormous and alarming. In this work, we used a geographical information system (GIS) for the cartography and quantitative evaluation of water erosion by using the universal soil losses equation under its adapted version to Moroccan conditions. The use of GIS enabled us to analyze and handle several parameters and criteria relating to the milieu. Results obtained show that the intensity of erosion and the quantities of sediments produced vary primarily according to the current land use as well as to the nature of the grounds and slopes. This approach enabled us to spatialize a specific model of erosion evaluation and to locate priority zones for possible management intervention.
