In Algerian Saharan, oases are characterized by the fragility of the ecosystem and degradation of microclimate, which covers most of the Algerian oasis, where the climate change is adversely affecting the society of the developing countries because their livelihoods rely mainly on climate-dependent activities, whether agricultural or economic. Zelfana is one of the thirteen oases that encompass the region of Ghardaia (Algerian Sahara); it is part of the territory of the Châamba. This oasis characterized for the past two decades by phoenicicole farms knows strong socio-economic and cultural mutations that have strongly influenced the agricultural sector for several decades. The main purpose of the paper aims to understand this diversity and define the characteristics of the farms, which rely on a structural typology for Treatment data by MAC - Multiple Correspondence Analysis under SPSS. After that, we determine the number of classes corresponding to the types of agricultural farms. Based on the most discriminating variables, we cleared the characteristics of each farm type. From this study, we determined the more discriminating variables include the professional identity of the farmer, the importance of farms, seniority, location, size of the farm, and the dominant culture. Clustering indicates five types of farms, namely: ancient irrigated farms (small gardens and Palm grove (CAPER)), the improved farms, small new farms, and at last the medium and large farms.

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This research aims to identify the various actors and their missions to fire management in Berriane oasis; a south-east region of Algeria known for its challenging environment and dense oases. The research is conducted in three main steps respectively involving the characterization of oases fires in the Berriane region, analysis of the spatial variability of fire in relation to the human and environmental factors, and finally, role of the different actors by the MACTOR method. The analysis of structured games between actors allowed assessing their influences and dependencies. Results confirm the role of actors of agricultural fires management the protection of the oasis ecosystem.

This article deals more particularly with the architectural reconstitution and the hydraulic checking of the rainwater harvesting system (RWH-system) installation in some residential buildings in Ottoman Algiers (16th to 18th centuries), where this water was intended for various domestic uses. This work was applied to two cases (Khdawedj-El'Amia and HassanPasha palaces). An architectural reconstitution by three-dimensional modeling was made based on investigations and bibliographic research on the system. In contrast, hydraulic verification was made according to the current European sizing standards based on rainfall records for over 100 years. The results indicate that these buildings are equipped with an innovative and efficient hydraulic system based on relativity between rain, roof, and stored volume (djeb), according to current standards; this system has the potential to meet the needs of the populations and ensure their water autonomy, particularly in times of water scarcity. And consequently, rainwater management in a secure way. On the other hand, the results assess the possibility of returning the RWH system to function today. It provides helpful information to develop an action plan and intervention strategies for restoring the (RWHsystem) in the heritage residential buildings for improving sustainability and maintaining the built heritage values of the historic Ottoman Algiers.