http://depot.umc.edu.dz/handle/123456789/7071 2026-10-31T19:01:58Z 2026-10-31T19:01:58Z Maou, Zakarya Bougherara, Ahmed http://depot.umc.edu.dz/handle/123456789/14865 2026-10-20T14:15:15Z 2024-11-18T00:00:00Z

Les Ziban : durabilité des effets des aménagements hydrauliques et atténuation des risques d’inondation et de sècheresse. Maou, Zakarya; Bougherara, Ahmed The Ziban, located in the extreme North-east of the Sahara in an arid climate (rainfall below 150 mm/year), benefit from the waters of the Septentrional Sahara Aquifer System (SASS) and surface run-off from the southern flank of the Saharan Atlas (Oued Labiod, Abdi, El-Hai, Larab and Oued Djedi). This situation provides them with significant and diversified water resources (groundwater and surface water), which have given rise to a number of Oases that have shown unrivalled agricultural dynamism in recent decades. Today, however, surface water only accounts for 7 % (82 Hm3 /year) of mobilized water resources. Nevertheless, their inflow has ensured the recharging of aquifers, particularly groundwater tables, which has supplied and continues to supply the city of Biskra with drinking water. Groundwater resources account for 98 % (1124, 24 Hm3/year) of mobilized water resources. Today, the rate of abstraction imposed by the expansion of developed areas (1040 ha/year) has led to a significant reduction in water levels and a deterioration in the quality of the resource. In this context, the impact of man’s action can aggravate the imbalance or mitigate the contradictions and promote the resilience of a rapidly developing region. In addition, the Foum El Gherza dam, 80 % silted up, no longer ensures flood control, hence the reappearance, after decades, of the risk of flooding in its downstream section (towns and agriculture). However, the impoundment of the fountain of the Gazelles and Bouzina dams (2000 and 2021) has dried up the Oueds El-Hai and Abdi, which were responsible for recharging the groundwater downstream. However, the planned underground dam (Ouled Djellal) remains the most suitable for hydro-morphological conditions and is perfectly suited to the harsh conditions of arid zones. To support the current pace of development, it has become inevitable to connect the Ziban to other regional sources. To this end, two water transfer projects have been adopted, a supply from the Albien at Touggourt and a drinking water supply from the Beni Haroun transfer system (Koudiet Medaouar dam). This strategy can only guarantee the resilience of the Ziban region.

2024-11-18T00:00:00Z عبدي, نضال بولحواش, علاوة http://depot.umc.edu.dz/handle/123456789/14854 2026-10-14T11:59:09Z 2025-07-02T00:00:00Z

المجال الشبه الحضري بين التمدد العمراني والاستغلال الزراعي في المناطق الجبلية عبدي, نضال; بولحواش, علاوة The present study focused on the analysis and then the measurement of some of the environmental impacts associated with the phenomenon of urban expansion to the detriment of semi-urban agricultural areas and mountainous areas near major Algerian cities. Because of the increasing migration of the population to the outskirts of cities and their settlement in them since the early eighties. This has further accelerated the change in the morphological shape of cities and the areas around them due to the phenomenon of urban expansion, which depends on the random (unplanned) model and affects the environmental and climatic level at the national and international levels. Historical, descriptive, analytical and quantitative methods have been used in the temporal and spatial monitoring of the population and land cover and land use patterns in these semiurban areas. Therefore, the wilaya of Constantine and its semi-urban area, composed of four subordinate municipalities (El Khroub, Hamma, Bouziane, Ain Smara and Didouche Mourad), were chosen as the geographical area for the application of this study, which covered the period between 1984 and 2020. A questionnaire was distributed to a sample of 50 farmers throughout the state, and field interviews were conducted with 25 representatives of local and state administrative authorities. The study has led to a series of results, the most important of which are the following: the first reason for the appearance of the negative environmental impact in the semi-urban area is temporary administrative practices that do not allow the environment to be affected by the environment. The study resulted in a series of results, the most important of which is that there is a notable change in the area of agricultural land occupation and use for semi-urban areas in mountainous areas of 29.70%. There is a significant difference in the distribution of values of the studied botanical indicators NDVI, MNDWI, NDBI and EVI from year to year, as most of them tend to change. An increase in the temperature of the earth's surface in the semi-urban area of Constantinople by 05°C in the last thirty-six years alone. Finally, the study recommends the need for a serious implementation of a policy of environmental awareness, the use of modern technologies and the activation of dissuasive laws to reduce the phenomenon of expansion to the detriment of semi-urban land, which will continue to intensify and affect the environment in the future (horizon 2040).

2025-07-02T00:00:00Z Cemali, Nedjoua Benazzouz, Mohamed Tahar http://depot.umc.edu.dz/handle/123456789/14818 2026-01-20T10:27:49Z 2022-07-12T00:00:00Z

Approche, de la gestion intégrée du littoral et des bassins fluviaux « GILIF » Cemali, Nedjoua; Benazzouz, Mohamed Tahar Like many coastal areas around the world, Skikda coastline is subject to disturbances that threaten its balance at various levels; ecological, sedimentary, sociological, and economic. With 160 km of coastal lineage, a very strong coastal dynamics, and a great conflict of use, Skikda coastline is a complex system at the interface between land and sea. The watershed is a sedimentary source of supply necessary for coastal balance, and any activ ty that contributes to the disruption of this supply will lead to a morphodynamic imbalance. This observation was a starting point for a reflection on the space that must be retained to manage and protect Skikda coastline. The main objective of this disertation is to strengthen geomorphological knowledge in a context based on the link between the watershed and the coastline. In order to achieve this objective, two approaches were used. A systemic approach based on the concept of system, integrating the upper land which is the watershed with the coastline;and a morphodynamic approach that relies on the digital processing of satellite images (Landsat 8) and aerial photographs (1960, 1970, 1988, 2002) through the application of Geographic Information Systems. The results obtained in the two areas studied, which are the Saf-Saf watershed and the mouth, demonstrate a regressive situation of the mouth and its nearby beach L’arbi ben Mhidi. The interpretation and discussion of these results allow to identify the factors that explain this morphological evolution, such as the impact of sedimentary retention at the dam level, deve lopments on the shore, and weather-marine forcing.

2022-07-12T00:00:00Z Taibaoui, Saad Khalfallah, Boudjemaa Layeb, Hafid http://depot.umc.edu.dz/handle/123456789/14743 2025-12-16T12:45:39Z 2023-04-12T00:00:00Z

La reduction des disparites inter-quartier avec une redistribution des equipements. Cas de la ville de Boussaâda. Taibaoui, Saad; Khalfallah, Boudjemaa; Layeb, Hafid The reduction of socio-spatial disparities between the districts of the city of Boussaâda, can takes at least two paths, one towards the relocation of people to weave a social mix, the other relies on the strengthening of services and equipment in order to to make precarious outlying neighborhoods more competitive and attractive. The quantitative analysis of the socio-spatial disparities between the districts of the city of Boussaâda, confirms the ghettoization of the peripheral districts, with (6) as index on the typology of Poulsen, (0,780) as index of uni-group Segregation. The weighted combination of these results with the spatial factors defined by the success rates for the BAC and BEF exams and the travel time to the city center and neighborhoods results in an overall zonal suitability index (IAZG), With (0.41 ) rating given to the Quartier Maitar summarizes the infinitely low level of service available to the populations of the district. These results are the conclusion of a combination of several methods, MCDA (AHP) and Zonal Fitness (IAZG). The contribution of this thesis is the construction of an IAZG, composed of several factors of socio-spatial disparity between the districts of the city of Boussaâda, used as an index of inter-district disparities it will be the basis of the decision to allocate the facilities across the city's neighborhoods. It is the result of a weighted combination between the factors of the multi-criteria decision taken by several actors in a transparent environment and which respects the principles of equity and sustainable development. The Hierarchical Analysis Procedure (AHP) (Saaty T., 1990) is used for weighting decision factors in the Multi-Criteria Decision Aid (MCDA) method. The result of this procedure is the ranking of the proposed alternatives, with the aim of reducing disparities between districts. Without ambiguity the final decision is taken by the politicians and in the presence of all the actors who participated in the decision

2023-04-12T00:00:00Z