Etude Hydrogeologique Et Hydrochimique De La Region De Touat (adrar)

Résumé: The Algerian Sahara is part of the Great Sahara, its climate is that of hyper areas characterized by low rainfall, very low relative humidity, very high air temperatures and high evaporation losses, these climatic conditions are the cause of the scarcity of surface water in these areas, hence the need to think about water use of groundwater to meet the water needs for the population, agriculture and industry. We studied the intermediate layer of the continental region of Tuat in the wilaya of Adrar in two ways, for hydrogeological déterminiez the groundwater level and the saturated zone as the outcrop of the water in the study area and is the key traditional system of collecting as a very ancient method of water removal in the wilaya of Adrar (important outlets). The hydrochemical hydrogeological evaluation of the surface area of the tank Tuat focused on the collection of 26 water samples that were chemically analyzed with determination of calcium, magnesium, sodium, potassium, chloride, sulfate , nitrate and bicarbonate, the conductivity and pH. It follows that the power of CI smaller, there are trios free flow in the study area: The first that flows in the direction NE-SE from tray Tademaït green area and the second Reggane it flows into the NE-SW direction from tray Tademaït green depression Tuat and the third erg Chech.et this flows into the NE-NW direction from tray Tademaït green area city of Adrar . So the general form of the water shows that it is a radial ply to intense exploitation. The study hydrochemistry watches there are two chemical facies of water in the Touat region are: Facies sodium chloride at a rate of 57.70% Facies sodium sulfate at a rate of 42.30%

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