Evaluation of the potential risk of erosion in the Oued Srou watershed (Mid Atlas, Morocco).

摘要

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, this study focuses on the establishment of a general diagnosis of soil erosion in the Ouea 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..