consequently the pattern of water availability and intrinsic characteristics in each water basin is heterogeneous and very relevant to all water supplyside decisions for instance the sebou water basin holds per cent of surface water resources and groundwater and although it represents only per cent of the total area of morocco per cent of the country s population lives within it the northern loukkos tangier and mediterranean coastal and sebou basins cover nearly per cent of the area of the country and more than half of the surface water resources conversely the tensift bouregreg and other southern water basins exhibit water security insufficiencies