John Libbey Eurotext

Science et changements planétaires / Sécheresse


Evaluation of the potential risk of erosion in the oued Srou watershed (Mid Atlas, Morocco) Volume 17, issue 3, Juillet-Août-Septembre 2006


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Institut agronomique et vétérinaire Hassan II (IAV), Madinat Al Irfane, B.P. 6202, Rabat-Maroc, Centre royal de télédétection spatiale, Secteur 21 Angle Av Allal Fassi et Av Assanawbar Hay Riad, Rabat-Maroc, Université Mohamed V, Faculté des sciences, Département de géologie, Av. Ibn Battouta, BP 1024, Rabat-Maroc
  • Key words: erosion, soil degradation, erosion control, Geographic Information System (GIS), Morocco
  • DOI : 10.1684/sec.2006.0049
  • Page(s) : 425-31
  • Published in: 2006

Soil erosion phenomena are a result of the interaction of several factors. Some factors such as precipitation and vegetation cover are variable in time and some others such as those related to soil and topography are much more permanent. Taking into consideration the protection of the environment, the main purpose of this study is to focus on the establishement of a general diagnosis of soil erosion in the Oued Srou watershed (Mid Atlas, Morocco). A Geographic Information System (GIS) was used as a tool for spatial analysis and decision-making to determine the areas that can be vulnerable to land degradation phenomena. The model used is the model developed by Manrique in 1988 and called Land Erodibility Assessment Methodology (LEAM). This model integrates three factors: soil erodibility, slope and rain erositivity. Moreover, the GIS was also used to acquire spatial data, elaborate a geospatial and georeferenced database, derive new data by means of spatial and thematic analyses and produce the corresponding maps. The result is a map of the potential risk of erosion pointing out areas that are the most exposed and requiring the implementation of suitable conservation means.