Science et changements planétaires / Sécheresse


Exploitation de la nappe alluviale du dallol Maouri pour des cultures irriguées au Niger Volume 6, issue 3, Septembre 1995

Université A. M. de Niamey, Niamey, Niger, Université de Liège, Laboratoire de géologie de l’ingénieur, d’hydrogéologie et de prospection géophysique, Bâtiment B 19, 4000 Liège, Belgique
  • Page(s) : 257-63
  • Published in: 1995

The drought in the Sahel has resulted both in endemic agricultural deficit and food crisis. One of the solution recommended by the population concerned and by international organisations (FAO, World Bank, etc.) when and where the situation allows, is out-of-season irrigated farming. A thorough survey of present water resources, and present and future requirements, taking quantitative and qualitative aspects into account, is thus required. The paper begins with a brief summary of the geographical, climatic, geological and hydrogeological conditions in the department of Dosso (Niger). Following this, the hydrochemical characteristics and capacity of the Continental terminal’s upper aquiferous system (including the dallols alluvial aquifers) are described. Taking intensified irrigation in the valleys resulting from population growth into account, a mathematical model was drafted, simulating the piezometric patterns of upper aquifers according to these new constraints.