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The Adrar site is among sites of the highest solar radiation potential in the world. This region is characterized by high ambient temperature in the summer, which in some days is exceed 45 °C, where the high ambient temperature is affects the solar cells.The aim of this paper is to assessments the PV cells types mono crystalline, poly crystalline, micro crystalline amorphous and tripple junction for meteorological variables of Adrar environment.These models were tested by using input data from meteorological station of (URERMS-Adrar),and these inputs are used in software for PV system (PVsyst) to identify the characteristics of these types of PV module. The comparison between PV cells type mono-crystalline and poly-crystalline of same maximum power (250 W) it show that the cells type poly crystalline it more affected by the temperature of than mono crystalline. Finally, have reached that the assessments the performance of PV module is linked to weather (clear sky, overcast sky, shading, cold and hot). [ABSTRACT FROM AUTHOR]

The area of Adrar is characterized by a traditional collecting system which one calls "Foggara it" which is considered the most effective alternative which the man found, in the desert, to solve the water shortage problem. This study aims to present principal geologic, hydrogeological, and hydrochemistry characteristics of the tablecloth of the Continental Guide in the area of Touat. This tablecloth is also called the tablecloth of the Gault. It is contained in the sandy-argillaceous formation of the Lower Cretaceous. From the chemical point of view, this water is very mineral-bearing and excessively hard, with strong contents of chlorides, sulfates, and sodium. The results showed that groundwater of the Adrar region is poor from the point of view of portability and they generally present risks on salinization for the soils. The Foggara is threatened of extinction (degradation, drying up, deterioration of water quality, etc.) because of problems local and regional related mainly on the exploitation and management of water, which requires a better vision for rational management of this resource to ensure sustainable development. For that, several recommendations are proposed. [ABSTRACT FROM AUTHOR]