Colloque international « L'Expérience métisse »

The Aquifer System of the Sahara shared by Algeria, Libya and Tunisia contains huge reserves of water, characterizing by a lower renewable resources.It consists of two aquifer levels, the Continental Intercalary and the Terminal Complex.The reserves are estimated at 30.10 9 m 3 (SASS, 2003).The last thirty years have shown an increase in exploitation of these aquifers, with an annual throughput of 0.6 10 9 m 3 in 1970 to a rate of 2.5 10 9 m 3 in 2005, indicating overexploitation.The Biskra region belongs to this group of aquifers.It has in recent years, a large hydro-agricultural development with a growing population, resulting in a considerable increase of water demand.For the setting up of a monitoring system for exploitation of water resources in the Saharan zone, the ANRH services in collaboration with CRSTRA have established a monitoring network to monitor changes in groundwater piezometric level of Terminal Complex.This includes 23 piezometers located in different exploited aquifer system.The piezometric mapping shows a drawdown of about 20 m in lower Eocene in the localities of Tolga and Doucen.This drawdown differs from an area to another in the Mio-Pliocene aquifer system, and it is 30 m between Ourellal and Sidi Okba and about 6 m in Zribet El Oued

Political science · Agriculture and Rural Development Research · French Urban and Social Studies · Social Sciences and Governance

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