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Rationalization of the north western Saharan aquifer system piezometric network Volume 19, issue 3, juillet-août-septembre 2008

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Authors
Centre de recherches et des technologies des eaux, Laboratoire de géoressources, BP 273, Soliman 8020, Tunisie, École nationale d’ingénieurs de Tunis, Laboratoire de modélisation en hydraulique et environnement, BP 37, Le Belvédère, 1002 Tunis, Tunisie

At the end of the first overall analysis of piezometric observations recorded in the Saharan aquifers, it was possible to identify a historical reference network composed of 73 water points with very heterogeneous spatial distribution by regrouping boreholes on criteria of proximity and behavioural similarity. It was necessary to rationalize the piezometric network by means of procedures intended to reinforce this network to meet the objectives of Saharan aquifer piezometric monitoring. The rationalization criteria used are relative to aquifer spatial cover, the monitoring of general drawdowns, the controlling of risk areas and the taking into consideration of particular boundary conditions and zones to give better knowledge of the system.