Processus d\u27urbanisation dans les villes-oasis présahariennes le cas du Draa-Tafilalt (Maroc)

Urbanization process in oasis cities Presaharan, the case of Draa -Tafilalt (Morocco) In the Oasis towns of Draa and Tafilalt \u27 , Nobody can deny today, the urban component in the oasis reality. From then on, the city will monopolize in the very near future more than half of the global population of the oasis region of biosphere. This by two internal and external mechanisms.Administrative promotion and urban concentrations allowing an internal blossoming of the urban fact in rural areas. Similarly with the multiplication of urban driving functions, the city reinforces its capacities of polarization of the rural areas. Thus the city quickly becomes the privileged place of economic, ecological and social changes