Hydrodynamic characterization of the Tamanrasset aquifer (Central Hoggar-South Algeria)

Abstract

In the region of Hoggar, the alluvial aquifers superimposed on a crystalline basement presents the essential water resource for the population of the region. The aquifers contain reserves fed by the flood waters. This recharge depends on several factors, including the hydrodynamic parameters of the surface layer. The hydrodynamic parameters (K) of an alluvial system in a Tamanrasset region were studied from grain size analysis of soil samples extracted from traditional wells, and pumping tests from wells in the same area. The geometric mean permeability (K) for the alluvial layer (9.31E-04 ms-1), determined by particle size analysis, was 90 times higher than the geometric mean obtained during the pumping tests (1.02E-05 ms-1)...