http://archives.univ-biskra.dz/handle/123456789/2149 2026-04-08T21:32:30Z http://archives.univ-biskra.dz/handle/123456789/2163 Titre: CARACTERISATION BACTERIOLOGIQUE DU LAC RESERVOIR DU BARRAGE SIDI CHAHED Auteur(s): MEHANNED S; ZAID A; CHAHLAOUI A Résumé: The present study was conducted to assess the bacteriological quality of the water dam Sidi Chahed who sits on the Oued Mikkés one of the major rivers draining the area between the cities of Meknes and Fez. The dam is fed by another stream, Wadi Mellah. This study focused on four samples at the dam four depths (0m, 10m, 20m-30m). Bacteriological analysis focused on indicators of pollution which include germs, germs total, total coliforms, fecal coliforms, fecal streptococci, and sulphite-reducing anaerobes. Analyses showed that the contamination is very important in the water column, the bacteriological pollution and differs from one level to another. The analysis and interpretation of the correlation between microbiological data variables were performed using the Principal Component Analysis and analysis by Hierarchical Classification. 2013-02-26T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/2162 Titre: HYDROCHIMIE DES EAUX SOUTERRAINES DE LA RÉGION D’ADIAKÉ (SUD-EST CÔTIER DE LA CÔTE D’IVOIRE) Auteur(s): EBLIN S.G; SORO G.M; SOMBO A.P; AKA N; KAMBIRÉ O; SORO N Résumé: The aim of this study is to evaluate the physicochemical quality of groundwater and explain phenomenon at the origin to the mineralization of these waters. Methodology based on physicochemical analyses of 26 samples of groundwater. Descriptive analyses of physicochemical parameters show that waters are acid and in the whole very low mineral content. Phosphates, silica and iron contents sometimes have very high levels in the water; above the WHO standard for drinking water. Piper diagram show that groundwater are chlorinated about 89% that above 80% chlorinated sodi-potassium. The Normalized Principal Components Analysis (NPCA) method has enabled to highlight two big phenomena in acquisition of the mineralization of waters. The main phenomenon of production of ions in water is the contact water-rock (the mineralization residence time). The second phenomenon is superficial contributions bound to water inputs through superficial infiltrations and saline and briny waters intrusion in the aquifer. The cluster analysis has enabled to identify four major clusters based chemical composition. The groundwater resources in the region of Adiaké have a good physicochemical quality but need in certain cases a specific treatment before supply. 2013-02-26T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/2161 Titre: CARACTERISATION DE LA NAPPE PROFONDE GAFSA NORD SUITE A LA SUREXPLOITATION DES EAUX SOUTERRAINES Auteur(s): MAJDOUB R; DRIDI L; M’NASRI S Résumé: The system aquifer Gafsa North is powered mainly by the flood water of wad El Kbir and the infiltration of rainwater. This system suffers from overexploitation due to the development of phosphates sector and renovation of oases Gafsa which led to the realization of several deep wells. The present works aims to assess the quantitative and qualitative aspects of the deep aquifer Gafsa North following the excessive use of groundwater. The groundwater level has unveiled a drawdown that varies between 2 and 6 m. In this regard, the high decrease of piezometric level recorded especially in the downstream of the plain, shows the lack of natural recharge of the aquifer due to low rainfall events, and the increased use of groundwater. The hydrochemical study showed that salinity varies between 1 and 3 g/l. According to the diagram piper and lithological sections, that salinity is generated by the dissolution of calcium and sulphate minerals and does not seem to be affected by the conditions of exploitation 2013-02-26T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/2160 Titre: ETUDE SEDIMENTOLOGIQUE DES SABLES DUNAIRES DE LA PLAINE DE TAFILALET (Yerdi, Labrouj, Mfis, Merzouga et Lambarkia) Auteur(s): ALALI A; BENMOHAMMADI A; BOUDADL; AQIDN Résumé: The descriptive study of dune facies plain Tafilalet enlightened us on the likely sand sheets, the axis of advance of the sands, and any remobilisassions. Only a more detailed analysis will shed light on the behavior of particles during transport, according to their size or nature of their origin, their specific areas of migration, deposition and remobilization. This characterization of the sand through his elementary particle, will be by laboratory analyzed by granulometric by sieving, morphoscopic by observing the insoluble fraction and mineral by separating the soluble fraction and heavy mineral Identification 2013-02-26T00:00:00Z