This work was financially supported by the National Research
Agency (ANR-VMC 2006) through the research project MESOEROS21.
We are also grateful to the “Institut de Recherche pour le
Developpement” (IRD) for funding the SudMed project, as well as
the French “Ministere des Affaires Etrangeres” and the Moroccan
“Ministere de l’Education Nationale, de l’Enseignement superieur,
de la Recherche Scientifique et de la Formation des Cadres” for
funding the “Programme d’Action Integree Volubilis” « Gestion
durable des ressources en eau dans le bassin-versant de Tensift
(region de Marrakech) » n MA/148/06. We also thank the ABHT
(Agence de Bassin Hydraulique du Tensift) for providing us with
rainfall and streamflow data and the DREF (Direction Regionale des
Eaux et For^ets, Marrakech) for their facilitation in the installation of
erosion plots.