Hydrogeology of hard rocks in some eastern and western African countries

The rapid increase in world population, especially in Africa and Asia, coupled with periodic droughts affecting extensive sub-desert areas of Africa, and the introduction of more efficient and cheaper drilling technology, boosted the well drilling programs in many countries. The United Nations have greatly contributed with numerous groundwater projects in more that 10 African countries, thus acquiring a better knowledge of the groundwater potential in many areas, especially those characterized by water scarcity.