La région de Tinibaouine est située au Nord-est de l’Algérie, en bordure Septentrionale des Monts de Batna-Belezma, Elle est caractérisée par un climat de type semi-aride à aride avec une précipitation moyenne annuelle qui n’excède pas 465mm, et une température moyenne annuelle de l’ordre de 22°C. Cette région est caractérisée par la culture de l’abricot comme culture essentielle suivie des olives, dont les parcelles sont toutes irriguées à partir de la source. Il s’agit en effet de 450 Ha d’arbres destinés à l’abricotier et de 108 Ha aux olives. L’émergence naturelle des eaux qui ont pour le réservoir Dj. Refaa situé en contrefort Sud de la plaine de Tinibaouine où émerge la source. Son débit actuel est de l’ordre de 100 à 110 l/s (mesuré en Mars 2015) alors qu’il pouvait atteindre 200 l/s par le passé en 1971. L’objectif de ce travail est de cerner les contraintes naturelles et anthropiques ayant une incidence directe sur l’usage de la source et de chercher le mode de gestion approprié, qui tienne compte non seulement des solutions techniques qui s’inspire également des règles sociales qui régissent l’usage et les conflits qui leurs sont liés.

A detailed biostratigraphic study of four sections (El Kantara, Menaa, Tighanimine and El Gaâga) in the Campanian–Maastrichtian of the Aures Basin in Algeria allows the identification of 109 ostracod species belonging to 50 genera. From a biochronostratigraphic point of view, none of the identified ostracod assemblages are typically restricted to the Campanian or to the Maastrichtian, but rather characterize a range covering the Campanian–Maastrichtian. As regards the paleobiogeography, the presence of species in common between Algeria and other countries or regions enables us to compile four maps showing the distribution of two provinces that developed during the Santonian-Paleocene, i) the South-West and South Tethyan Margins Province, including North Africa, the Middle East and Arabian Peninsula, and ii) the East Atlantic Margin Province, bordering West and Central-West Africa. We can also recognize relationships between the different regions making up these provinces, which remained under more or less arid, subtropical to tropical climates, with ostracods migrating according to the directions of ocean currents during the Late Cretaceous. The dispersal of the ostracods reflects marine communication between these provinces and India, the southern USA and Jamaica, Brazil and Europe.

Hydrodynamic Characteristics of the “Complex Terminal” aquifer in the Region of Oued Righ North (Algerian Sahara)

Hammadi, A., Nafaa Brinis, and M Djidel. In Press. “Hydrodynamic Characteristics of the “Complex Terminal” aquifer in the Region of Oued Righ North (Algerian Sahara)”. Algerian Journal of Environmental Science and Technology. Publisher's Version Abstract

Accessibility of fresh water, the nature's gift wheels the foremost part of the world economy. The sufficient supplies of water are essential for agriculture, human intake, industry as well as regeneration. The Oued Righ region is located in Algeria's South-East, specifically in the NorthEast of the Sahara, on the Northern edge of the Grand Erg Oriental and the Southern border of the Aures massif. This area appears as a lower Sahara synclinal basin and is part of a broad North-South trending ditch. It is famous for its date palms, the development of the date culture in this region is attributed not only to the population’s efforts, but above all to the particular climatic conditions, the favorable soil characteristics and the existence of significant groundwater. The aim of this study is to understand the results obtained from using different approaches of water hydrodynamics in the Complex Terminal aquifer. The aquifer’s hydrodynamic characterization was carried out using hydrodynamic parameters and piezometry. As a result, the transmissivity and permeability obtained data using traditional Cooper-Jacob method showed that the flow capacities of the aquifer environment and the productivities of the structures are important in the studied zone where, the highest value of transmissivity equal 2.36× 102-m 2 /sis found in the central part of the study area in El-Meghair. The establishment of piezometric maps reveals a flow direction oriented toward the chott.

Risk assessment ofirrigation with water contaminated by trace metals (Cd, Cr, Pb and Zn) on the soil-plant complex in the ElMadher plain (Batna, north-east Algeria)

Benfarhi, F, and Mohamed-Redha Menani. In Press. “Risk assessment ofirrigation with water contaminated by trace metals (Cd, Cr, Pb and Zn) on the soil-plant complex in the ElMadher plain (Batna, north-east Algeria)”. Journal of Water and Land Development.

Calculation of water needs of the main crops and water resources available in a semi-arid climate, case of Zana-Gadaïne plain, Northeastern Algeria

H. Belalite,, M.R. Menani, and A. Athamena. 2022. “Calculation of water needs of the main crops and water resources available in a semi-arid climate, case of Zana-Gadaïne plain, Northeastern Algeria”. Algerian Journal of Environmental Science and Technology ALJEST 8 (2). Publisher's Version Abstract

The relative scarcity of water resources in Algeria and their unequal distribution induce a rational use of available resources. The Zana-Gadaïne plain appears as an exemplary case study, where the difficulties posed by the problem of crop water needs versus the availability of water resources appear. This article, based on field surveys and in-situ measurements, aims to identify the pressure of irrigation on water resources and the optimization of their use in an agricultural area, where irrigated agriculture represents 85% of the water consumption of the Zana-Gadaïne plain. The piezometric study in correlation with hydrogeological data reveals that groundwater resources are limited, aggravated by wastage resulting in a consequent drawdown of 24 meters over 11 years. The analysis of interannual climate variability has enabled us to draw rainfall maps characteristic of the evolution of rainfall over the past decades where we observe a net deficit in precipitation. We calculated the evapotranspiration and the requirements in irrigation water for each crop in order to compare them with the available hydric resources and the establishment of irrigation schedules for the principal irrigated crops. The analysis of interannual climate variability has enabled us to draw rainfall maps characteristic of the evolution of rainfall over the past decades where we observe a net deficit in precipitation. We calculated the evapotranspiration and the requirements in irrigation water for each crop in order to compare them with the available hydric resources and the establishment of irrigation schedules for the principal irrigated crops.

Using vadose-zone water stable isotope profiles for assessing groundwater recharge under different climatic conditions

Boumaiza, Lamine, et al. 2021. “Using vadose-zone water stable isotope profiles for assessing groundwater recharge under different climatic conditions”. Hydrological Sciences Journal 66 (10). Publisher's Version Abstract

Considering three sites under different climate conditions (arid, semi-arid, and subhumid), this study aims to use the vadose-zone water stable isotope profiles to estimate the groundwater recharge rate. High-resolution vertical subsurface soil sampling along the vadose zone of the investigated sites was conducted. The collected samples were analysed to determine their stable isotope ratios (δ²H and δ¹⁸O) that were used along with the piston displacement method to estimate recharge. Annual recharge rates of 0.2% (± 0.1%), 2.5%, and 18% of the total annual precipitation were obtained for the arid, semi-arid, and subhumid sites, respectively. Recharge rates at the semi-arid and subhumid sites are comparable to those previously estimated using water balance-based methods. The recharge rate at the arid site is lower than that previously estimated for that site using the water budget-based method, revealing difficulties in applying the piston displacement method under an arid regime.

paleoenvironmental study of oum ali region(tébessa, algeria) during quaternary, through the study of fluvial terrace of khenigue wadi

DEFAFLIA, Nabil, Fouad Djaiz, and Chamseddine Fehdi. 2021. “paleoenvironmental study of oum ali region(tébessa, algeria) during quaternary, through the study of fluvial terrace of khenigue wadi”. ACTA GEOBALCANICA 7 (4) : 151-157. Publisher's Version Abstract

Stratigraphic, sedimentological and magnetic study was performed on alluvial terraces, rich in archaeological tools, the region of OUM ALI, in north-eastern Algeria. The sedimentological points of view, the sediments are dominated by the sand fraction followed by the silt fraction; moderate concentrations of CaCO3 are the result of the dissolution of the surrounding limestone reliefs (Maastrichtian limestone). The morphoscopic observation of quartz grains with a dissecting microscope allows us to offer more or less significant changes, since they are often dull or sub-blunted. The results of the magnetic survey are consistent with those of the sedimentological study. The values of magnetic susceptibility are strong in the middle part of the stratigraphic section (just above the archaeological level) and decrease slightly at the top. Lower values are stored in the lower part. The dependence of frequency values of magnetic susceptibility (fd) are strong throughout the stratigraphic section and show the presence of a mixture of single-domain grain size (R), pseudo-single domain (PMD) and superparamagnetic (SP) (with a predominance of SP grains). The high concentration of SP grain size reveals the presence of significant soil formation during the implementation of the sediment

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