In Morocco, the consequence of increased industrialization and a rapidly growing population accentuated by a progressive shift from rural to urban living. This resulted in the growth of requirements for the quality and quantity of water resources, their more intensive and comprehensive use. The government policy in the agricultural sector has always favored investments in the irrigation subsector. These investments have accounted for more than 60 % of the total public investments in agriculture since 1965. The goal was to put under perennial irrigation 1 mill. ha by the year 2000. This is referred to as the 'million-hectare' policy. There are both Small and Medium Scale (SMI) and Large Scale (LSI) irrigation systems. The SMI projects range from few to several thousand hectares. They are mainly traditional systems some of which have been developed for centuries.