Analyse isotopique ; Bilan sédimentaire ; Domaine aride ; Erosion des sols ; Erosion hydrique ; Iran ; Iran du Sud-Ouest ; Modèle ; Ravinement ; Traceur ; Transport sédimentaire
Arid area ; Gully erosion ; Iran ; Isotope analysis ; Model ; Sediment budget ; Sediment transport ; Soil erosion ; Tracer ; Water erosion
and 137Cs which provide a clear distinction between subsoil and topsoil were used. The mean value of Scg, the efficiency of the composite tracer, the variation of Scg, and finally the accuracy of model calculations for each tracer are discussed. Land
managers, who rely on results of erosion models which mainly focus on rill and sheet erosion, should consider these results, which demonstrate the importance of gullies as a major sediment source.