Exploitation des critères géologiques, hydrogéologiques de l’aléa retrait gonflement des formations superficielles du bassin versant El Hamiet (N-E-Algérie

Abstract

Located south-east of the wilaya of Sétif in the watershed of El Sebkhet Hamiet is considered among the most at risk of soil movements (especially the risk withdrawal swelling) areas, which led us to conduct this study . This work is based on a geological survey (training Mio-Plio-Quaternary composed mainly of clay, silt, gravel ...), hydro-climatological and geotechnics for sustainable land use and to avoid possible human and material damage. This thesis includes a study of synthesis aimed at achieving a geotechnical and mineralogical study diffractometry (RX) to know the landslide hazard in this region. Based on previous studies and data collected in the field, the mining and processing of the samples show that the significant occurrence of instabilities in this region is the result of a combination of several factors; tectonic structure, climate and lithological nature are purely natural causes which are added anthropogenic factors. The objective of this research is to explore and demonstrate the different root causes of the phenomenon of shrinking and swelling clays, and therefore to assess the susceptibility to the development of these ground movement in the territory of study