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Mapping of suitable zones for manual drilling as a possible solution to increase access to drinking water in Africa

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A study concerning the identification of suitable zones for manual drilling has been carried out in 12 countries (Benin, Central African Republic, Chad, Cote d’Ivoire, Liberia, Madagascar, Mali, Mauritania, Niger, Senegal, Sierra Leone, Togo) from 2008 to 2010. The methodology was based in the integration of different information already existing (like maps and data, reports, direct experience of water experts in each country) but not properly organized. All the information was corrected and organized in a GIS database; the cross-analysis of the different layers allowed to identify  the geological suitability (soft and permeable shallow geological layers), the suitability according to water depth (exploitable water not deeper than 25 m) and the most suitable morphological structure.

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