Hydrogélogie et etude des aquifères de la région Ain Touta Sud de wilaya de Batna.

Abstract

Water is a raw material of great importance for the survival of beings humans and their environment. Population growth in the region study requires an increasing need for water. In this work we aim to determine the water potential of the Ain –Touta region, based on hydro climatologically, geological, geophysical and hydro geological tools. Geographically, the Ain –Touta region is located in south-west of the Batna city and 35 km from the capital of the wilaya. Geologically, it belongs to the Aurès Mountains which represent the eastern part of the Atlas range. It is characterized by Quaternary and Cretaceous age formations. It is essentially made up of: marls, limestones, Coniacian-Santonian marl-limestones, clays, gravies and sands-clay. Ain Touta is subject to a semi-arid climate; Cold winter and hot summer; with an average annual precipitation of around 262.49 mm and an average annual temperature of around 19.59C °. The hydrogeological and geophysical study made it possible to describe the geometry and structure of the water tables. They defined three aquifers: - Plio-Quatérnaire aquifer: Made up of clays and coarse materials (scabs and silts). -Coniacian-Santonian aquifer: Composed by marl-limestone alternations. -Turonian aquifer: Characterized by marl-limestone formations. The hydrodynamic study indicates that the Ain Touta region characterized by high transmissivity nd high flow, therefore significant water potential.