Résumé
Using the hydrological model GR2M and climate scenarios data at high resolution over Morocco issued from the ARPEGE-Climate model, this study has tried to evaluate climate change impacts on water resources of the Moulouya watershed. The analysis of observed discharge data reveals a negative trend over the period 1958-2000. This decrease is mainly attributed to a decrease in total rainfall amounts and to a positive trend shown by the ETP. After the SRES A1B, the Moulouya winter discharges are projected to also decrease during 2021-2050.