Abstract
AbstractThe Zat watershed is a left bank tributary of the Tensift watershed. It is located to the south-east of the Marrakech city. This basin presents all the factors that can generate the risk of water erosion, namely, the accidental topography, the limited vegetation cover, as well as a lithology favourable to erosion.The aim of this study is to analyse the main factors that can lead to water erosion and to identify vulnerable areas in the Zat watershed. The study is carried out by applying the revised universal soil loss equation. The introduction of geographic information systems and remote sensing is essential to obtain significant results.The results obtained from the RUSLE model show that the climatic aggressiveness, the topographic factor, the erodibility and the vegetation cover factor, present significant values which means the strong presence of erosion at the level of the Zat watershed. Indeed, the average value obtained for soil losses is 347 t/ha/year, with a standard deviation of 341 t/ha/year.KeywordsRUSLEWater erosionWatershedZatGISRemote sensing
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