Unfortunately, several oases are suffering from the abandonment of traditional agricultural practices because of the soil salinization and water quality degradation, allowing desertification to proceed. In the southern Ouarzazate region, 80 per cent of soils are affected by salinization. Certainly, between 80 per cent and 90 per cent of economically accessible surface water resources have already been regulated through dams and inter-annual storage reservoirs in Morocco.