http://archives.univ-biskra.dz/handle/123456789/37 Sun, 19 Apr 2026 16:06:48 GMT 2026-04-19T16:06:48Z http://archives.univ-biskra.dz/handle/123456789/111 Titre: SECHERESSE METEOROLOGIQUE AU BASSIN HYDRAULIQUE OUM ER RBIA DURANT LES DERNIERES DECENNIES Auteur(s): JOUILIL, I; BITAR, K; SALAMA, H; AMRAOUI; MOKSSIT, A; TAHIRI, M Résumé: Morocco has often been known for the past periods of severe drought. The situation is critical for the four watersheds in the country (especially for the most important hydric basins: Oum Erbia, Sebou, Moulouya, Souss Massa). In the case of Oum Erbia hydraulic basin, the rainfall situation was characterized by a global deficit, due to the combined effects of drought and overuse. The gap reached in some resorts 50%. The data series reconstructed by drought indices most commonly used in Morocco for the monitoring and prediction are:  The deviation from the precipitation index,  The deviation from the average, compared to the normal standardized precipitation index and precipitation (SPI). These indices allowed us to show that the hydraulic basin OUM ERBIA experienced dry spells from 1980-81 to 1985-86, from 1991-92 to 1994-95 and from 2000 - 2001 to 2002-2003 in the last twenty years. A review of drought years revealed a higher frequency and spatial extent of the largest drought are at the moment longer, more frequent and they succeed. The hydraulic basin has experienced an increase in average temperature by about 1°C, providing information on the phenomenon of global warming. Mon, 23 Dec 2013 00:00:00 GMT http://archives.univ-biskra.dz/handle/123456789/111 2013-12-23T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/110 Titre: GROUNDWATER HYDROCHEMISTRY AND MASS TRANSFER IN A STRATIFIED AQUIFER SYSTEM (JEFFARA-GABES BASIN, TUNISIA) Auteur(s): SAHLI, H; TAGORTI, M.A; TLIG, S Résumé: The present work exposes the existence of a real mass transfer in the aquifer system of the Jeffara-Gabès basin. The main aquifers (Complexe Terminal) include Mio-Plio-Quaternary and Senonian sequences associated to stratified lower Cretaceous sandstone of the Continental Intercalary aquifer. Geochemical and isotopic data of groundwater aquifers needed to better understand the relationship between different stratified layers and aquifers. It indicates that Senonian aquifer has been recharged to the West of the area of study by the Continental Intercalary via the El Hamma fault network oriented N-S and NWSE. The major elements analysis shows that water table of the Complex Terminal with low salinity fit to Ca-Na-SO4 type while waters with high total dissolved salts belong to Na-(Mg)-Ca-SO4-Cl type which characterizes the Continental Intercalary hydrochemical facies. Chemical analyses In addition to geological data and thermodynamic calculation attest the existence of an evident lateral communication between Continental Intercalary aquifer and the Jeffara aquifer system through the El Hamma active faults. Isotopic data show that Complex Terminal groundwater has been affected by a paleorecharge and indicate a mixing of Continental Intercalary and Complex Terminal groundwater. Also, the results show an upward leakage from the Senonian aquifer to the uppermost mio-plio-quaternary reservoir via NE-SW and E-W oriented faults. Mon, 23 Dec 2013 00:00:00 GMT http://archives.univ-biskra.dz/handle/123456789/110 2013-12-23T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/109 Titre: CONTRIBUTION A L’ETUDE DE L’ORIGINE DU PLOMB CONTENU DANS LES EFFLUENTS DE LA STEP UTILISES EN AGRICULTURE DANS LE PERIMETRE MARAICHER DU SEBKHA (NOUAKCHOTT, MAURITANIE) Auteur(s): ABDOULAYE, DEMBA N’DIAYE; MOHAMED OULD SID’ AHMED OULD KANKOU; IBNO NAMR1, KHALID Résumé: In order to study the origin of lead content in the effluent of the WWTP used in agriculture in the scope of Sebkha gardener, the samples were taken at the WWTP between October and December 2011. In addition to studying the evolution of lead, electrical conductivity, chlorides, sodium and chemical oxygen demand were studied; statistical analysis methods were applied to the results obtained. The results show that lead levels recorded at the effluent of the WWTP ranging from 104.5 mg / L and 176.5 mg / L. The statistical analysis of results shows that lead is strong and positive correltion with electrical conductivity, chloride and sodium and positively moderately correlated and significant with the Chemical Oxygen Demand. Mon, 23 Dec 2013 00:00:00 GMT http://archives.univ-biskra.dz/handle/123456789/109 2013-12-23T00:00:00Z http://archives.univ-biskra.dz/handle/123456789/108 Titre: CONTRIBUTION A L’ETUDE DE LA QUALITE PHYSICOCHIMIQUE DE L’EAU DE LA RIVE DROITE DU FLEUVE SENEGAL Auteur(s): ABDOULAYE, DEMBA N’DIAYE; KHADIJETTOU MINT, MOHAMED SALEM; MOHAMED OULD SID’AHMED OULD KANKOU Résumé: The study concerns the analysis of physico-chemical parameters (Temperature, pH, Electrical Conductivity, Suspende Matter, Chlorides, Ammonia, nitrates and Oxidizable Matters) along the right bank of the Senegal River. Thus, water samples were performed at ten study sites during the rainy season and dry season. The application of statistical analysis methods on physicochemical results showed the existence of two groups of water: a group of high temperature water, basic and salinity and mineralization expressed by electrical conductivity, chlorides and oxidizable matters. This group is characteristic of the Senegal River during the dry season and a group of rich water and dissolved and suspended particles and nitrogen-containing ammonia. This group is characteristic of the Senegal River during the rainy season. This study allowed us to also highlight the paramount influence of seasonal variations and human activities. This is one more, for adequate treatment modalities of this water is currently supplied to the power of the city of Nouakchott in drinking water. Mon, 23 Dec 2013 00:00:00 GMT http://archives.univ-biskra.dz/handle/123456789/108 2013-12-23T00:00:00Z