Azzedine HANI - Academia.edu (original) (raw)

Papers by Azzedine HANI

Engineering Geology for Society and Territory - Volume 1, 2014

Water quality is subject to frequent changes in the Drean-Annaba alluvium aquifer. Water-rock int... more Water quality is subject to frequent changes in the Drean-Annaba alluvium aquifer. Water-rock interaction can not be the only process that produces the observed modification, but dryness that the country knew during the last two decades has highly contributed to the water quality changes. During this period, irregularities in the distribution of rainfalls, in time and space, have been observed. As a result, a periodicity in hydrochemical changes in water of wells and rivers is noticed. Statistical, the Principals components analysis (PCA) tools and Tickel diagram have been used to show, through chemical presentation, these effects. The results show, indeed, seasonal changes of water quality for the period 1999–2000. From a cationic point of view, a competition between alkaline and alkaline earths is shown. On the other hand, from an anionic point of view, there is a transition from chlorides to sulphates and may be to bicarbonates. The present work was carried out in a relatively small area and this was useful to show the relationship that exists between dryness and water quality of both the aquiferous system and surface water.

Energy Procedia, 2015

The existence and expansion of arid region, after being accepted as a natural inevitability, is n... more The existence and expansion of arid region, after being accepted as a natural inevitability, is now the subject of many studies, essentially devoted to the problem of their recharges water. Also, the exploitation and use of groundwater were they high specificity in the water economy. For the region of Sidi Okba (in W. Biskra), which experienced a major agricultural development which required extensive drilling, six (08) holes capturing the Mio-Pliocene water table, the latter is more extensive supply sources more stable than surface water. In this research, we will try to restore the hydraulic head of the water table using the MODFLOW computer code. This numerical model was developed on the basis of an overall synthesis of acquired data. This data is geometric and hydrodynamic order to better manage these resources. Map of lowering is drawn using Surfer.8.0. The Excel Solver is application used to optimize the operation of capturing the water table. This work has identified the main groundwater flow in the deep aquifer (Mio-Pliocene) and deducts the possibility of further exploitation in boreholes serving the city of Sidi Okba.

Synthese, 2017

Pour lutter contre les inondations, une longue serie de mesure de debits est necessaire, ce qui n... more Pour lutter contre les inondations, une longue serie de mesure de debits est necessaire, ce qui n’est pas le cas malheureusement dans la plupart du temps. L’arret de la station hydrometrique d’Ain-Charchar controlant le bassin versant de l’oued El Kebir Ouest a Ain-Charchar sur une superficie de 1130 km 2 pose un serieux probleme de donnees. Pour combler ce handicap, nous avons utilise les valeurs de debits maximums enregistres pendant une periode de 14 ans, de 1985 a 1999, qui s’ajustent bien a la loi de Gumbel. A partir de la droite d’ajustement, on a determine les valeurs des crues probables pour deferentes periodes de retour ; 200 m 3 /s pour une periode de retour de 10 ans et 300 m 3 /s pour T egale a 100 ans. Pour atteindre notre second objectif, qui est la possibilite de reconstituer les debits de crue par des formules empiriques basees sur les precipitations, on a verifie la correlation pluie-debit par le logiciel Hydrolab et le modele GR 1. Les deux methodes ont montre l’ex...

Journal of Water and Land Development, 2017

Water in the Seybouse River basin is getting scarce, yet it is the key to its economic developmen... more Water in the Seybouse River basin is getting scarce, yet it is the key to its economic development. A fast growing population, expanding agricultural and industrial sectors and the impacts of climate variability, create demands for new water sources and innovative management of water resources and services. The object of this study is the water resources management in the lower Seybouse basin characterized by a steady increase of water demand to meet different uses. This study takes into account changes in water demand of different urban, agricultural and industrial supply process. Our approach is to integrate data in WEAP modelling software to simulate current and future water balance and then to analyse the situation of water in different scenarios, socio-economic development and climate change to 2050. This software is based on the representation of the feeding system in a form of the network of water demand and supply. Our findings reveal the vulnerability of the region in its a...

The potentiometric surface in the Annaba basin, which covers an area of 264 km 2 , has declined s... more The potentiometric surface in the Annaba basin, which covers an area of 264 km 2 , has declined significantly since 1995. A transient multilayer model has been developed to synthesise the hydrologic data. The groundwater flow was modelled using the finite difference method with a horizontal dimension of 500 x 500 m for the cells. The model consists of two layers, the first corresponding to the alluvial phreatic aquifer and the second to the deep confined aquifer, and is calibrated against the steady state groundwater heads recorded before 1996. Under steady-state conditions, the correspondence between simulated and observed water levels is generally good (average difference of 0.4 m). For the deep aquifer, the simulated time-series hydrographs closely much the recorded hydrographs for most of the observation wells. For the alluvial aquifer, the recorded hydrographs cover only a short time period, but they are reproduced. The model indicates that groundwater pumping induced a decreas...

Food and Environment Safety Journal

Environmental Earth Sciences, 2014

Mar Chiquita is a coastal lagoon located in the Argentine Buenos Aires province in South America.... more Mar Chiquita is a coastal lagoon located in the Argentine Buenos Aires province in South America. The aim of this study was to perform a hydrochemical and stable isotopes characterization in order to better the understanding of the hydrology of the Mar Chiquita lagoon's catchment and its water budget. Groundwater samples were taken from 144 wells and 21 samples from main streams, and seven lagoon water samples were also collected. Chemical analyses were carried out using standard laboratory methods, and isotopic determinations were made through laser spectroscopy using a DLT-100 liquidwater isotope analyzer. Hydrochemical analysis permits a general classification of groundwater and streamwater as sodium bicarbonate waters, while the lagoon chemical composition shows an evolution toward seawater composition, from the north to its mouth, which is located southerly. Isotopic data show a source of aquifer recharge from rainfall and a groundwater domain into the streams' flow. Three main components can be recognized as end members in a plot of electrical conductivity (EC) versus d 18 O: seawater, streamwater and groundwater. Obtained EC values for groundwater in the discharge zone (EC average value = 3,516 lS/cm) allow minimizing its direct contribution and to take into consideration two dominating end members: streamwater and seawater. Mar Chiquita lagoon's water falls close to the line between streamwater and seawater end members according to its EC and d 18 O. The obtained seawater proportion for these samples ranges from 84 % in the lagoon's mouth to around 0 % in the more distal area.

Food and Environment Safety Journal, 2021

The water supply environment in Seybouse Valley (North East of Algeria) is sensitive and fragile ... more The water supply environment in Seybouse Valley (North East of Algeria) is sensitive and fragile as the aquifer is highly vulnerable to various sources of pollution, must recognize the pollution sources and water quality integration. So, there is a need for a better knowledge and understanding of the water pollution determinants to meet the Domestic, agricultural and Industrial uses. The pollution of this ground water was determined by Total Dissolved Solids (TDS). This represents the salinity of freshwater and originate from natural sources, sewage, urban, runoff, industrial wastewater and chemicals. Based on cause-and-effect relationships, the Driver–Pressure–State–Impact–Response (DPSIR) plan was used to establish indicators for an integrated water resource management approach to water quality in the semi-arid Mediterranean region. The aim of this work is to determine the most pressing pollution source of Seybouse Valley. With this intention, the artificial neural network (ANN) m...

Pour mettre en evidence le phenomene de la salinite des eaux superficielles qui se pose dans la r... more Pour mettre en evidence le phenomene de la salinite des eaux superficielles qui se pose dans la region du Nord-Est algerien, on a fait appel a deux methodes, qui sont la thermodynamique et l'analyse en composantes principales. La premiere a montre que les eaux de la region sont sous-saturees vis-a-vis du gypse, de la dolomie et de la calcite. Cette sous-saturation est due a la dissolution, ce qui entraine une augmentation des concentrations minerales de l'eau. La deuxieme methode est basee sur l'analyse en composantes principales et montre la repartition des sels mineraux dans la region. A Guelma dominent les bicarbonates, a Bouchegouf apparait une domination des sulfates et a Annaba les chlorures sont tres presents. On note egalement une pollution des eaux par les nitrates.

The metamorphic Edough massif, located in the northeast of Algeria has been chosen to analyse the... more The metamorphic Edough massif, located in the northeast of Algeria has been chosen to analyse the physico-chemical elements contained in the springs waters whose source is generated from the hydrogeological system. The supply of the aquifer is due to the rainfall infiltrations. In this work the artificial neural networks have been used to simulate the flows and the mineralization of the springs waters. Consequently, we have shown the effect of the physico-chemical and climatic factors and more particularly the structural one on the hydrological behaviour of the springs. The study of the physico-chemical characteristics of the aquifer was based on the analytical results carried out on a set of samples every 15 days. On the basis of a statistical treatment, the main processes ruling the observed chemical evolution within the aquifer were defined. The infiltration of meteoric water governs the dilution of the chemical elements and the increase of potassium contents. The waste water inc...

LARHYSS Journal, 2010

La ville de Bechar situee dans le Sud Ouest algerien, se caracterise d’un climat aride a tendanc... more La ville de Bechar situee dans le Sud Ouest algerien, se caracterise d’un climat aride a tendance saharienne, avec une temperature moyenne de28,80°Cet une precipitation moyenne de72,97 mm, (serie 1985-2006). Elle subit comme toutes les villes algeriennes, une forte demande en eau, proportionnellement a l’augmentation du nombre de la population, et au taux d’accroissements de 3,6 %, qui est de 192909 h en 2007, estimee a 348415 h en 2027. L’eau dans le reseau d’AEP de la ville de Bechar (737 km), provient principalement du barrage de Djorf Torba (80%), et secondairement de l’aquifere du Turonien de Ouakda (20%), avec des debits, respectivement de 358,72 l /s et 97 l /s. La ville de Bechar est raccordee avec un taux de 96 %, et une dotation reelle de 139 litre / habitant/ jour, et un taux de satisfaction de 58%, ce qui est tres satisfaisant pour une situation pareille. Le present travail consiste a dresser un bilan sur la situation des differentes ressources hydriques, dont la...

LARHYSS Journal, 2015

La realisation d’une GIRE, requiert, de nombreuses informations, qui helas en Algerie sont souven... more La realisation d’une GIRE, requiert, de nombreuses informations, qui helas en Algerie sont souvent indisponibles et d’une fiabilite incertaine. Cependant pour combler ce vide, on peut utiliser d’autres approches comme les methodes de vulnerabilite a la pollution. Ainsi les resultats obtenus donnent un apercu sur l’etat qualitatif de la ressource en eau. Dans notre travail, nous avons considere deux methodes (DRASTI et Pusalti). Les resultats obtenus montrent que les eaux de la nappe superficielle conviennent a l’irrigation par contre les eaux des horizons aquiferes plus profonds conviennent a l’AEP et l’irrigation. De ce fait l’etablissement d’une GIRE, des eaux des horizons profonds reste realisable et souhaite.

The Handbook of Environmental Chemistry, 2020

The mine is situated in the East Algerian near the frontiers of Tunisia. The exploitation of iron... more The mine is situated in the East Algerian near the frontiers of Tunisia. The exploitation of iron is stopped until 1967.The water samples were collected from groundwater and surface water. Physicochemical parameters were measured during fieldwork. Water samples were analyzed for major ions and metallic trace element.

Energy Procedia, 2017

District heating networks are commonly addressed in the literature as one of the most effective s... more District heating networks are commonly addressed in the literature as one of the most effective solutions for decreasing the greenhouse gas emissions from the building sector. These systems require high investments which are returned through the heat sales. Due to the changed climate conditions and building renovation policies, heat demand in the future could decrease, prolonging the investment return period. The main scope of this paper is to assess the feasibility of using the heat demand-outdoor temperature function for heat demand forecast. The district of Alvalade, located in Lisbon (Portugal), was used as a case study. The district is consisted of 665 buildings that vary in both construction period and typology. Three weather scenarios (low, medium, high) and three district renovation scenarios were developed (shallow, intermediate, deep). To estimate the error, obtained heat demand values were compared with results from a dynamic heat demand model, previously developed and validated by the authors. The results showed that when only weather change is considered, the margin of error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation scenarios, the error value increased up to 59.5% (depending on the weather and renovation scenarios combination considered). The value of slope coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and renovation scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improve the accuracy of heat demand estimations.

Bulletin de la Societe Geologique de France

Département des sciences de la terre, université d'Annaba. RESUME La ville de Bechar située d... more Département des sciences de la terre, université d'Annaba. RESUME La ville de Bechar située dans le Sud Ouest algérien, se caractérise d'un climat aride à tendance saharienne, avec une température moyenne de 28,80°C et une précipitation moyenne de 72,97 mm, (série 1985-2006). Elle subit comme toutes les villes algériennes, une forte demande en eau, proportionnellement à l'augmentation du nombre de la population, et au taux d'accroissements de 3,6 %, qui est de 192909 h en 2007, estimée à 348415 h en 2027. L'eau dans le réseau d'AEP de la ville de Bechar (737 km), provient principalement du barrage de Djorf Torba (80%), et secondairement de l'aquifère du Turonien de Ouakda (20%), avec des débits, respectivement de 358,72 l /s et 97 l /s. La ville de Bechar est raccordée avec un taux de 96 %, et une dotation réelle de 139 litre / habitant/ jour, et un taux de satisfaction de 58%, ce qui est très satisfaisant pour une situation pareille. Le présent travail c...

Geographia Technica

ABSTRACT This work treats the problem of the urban wastewater (sewage) influence identification o... more ABSTRACT This work treats the problem of the urban wastewater (sewage) influence identification on the groundwater chemistry, in particular the quality parameter in an urban environment, under an arid climate in Béchar city, located at the Algerian Western south. The ability of this groundwater for consumption is treated by comparing its chemical composition to Algerian standards, according to which half of the wells is not potable, whereas those of the World Health Organization (WHO) qualify the majority of samples by drinkable ones. The irrigation suitability is also examined, where the distribution of the samples is variable among different classes, were the projection of some points is except Wilcox diagram (very bad quality). The determination of the chemical facies allows the different groups identification and their changes over time, and factors influencing this mineralogical mobility. The main identified facies are chlorinated calcium, and chlorinated sodium. Microbiological analysis (total germs, Total Coliforms, Streptococcus, Clostridium Sulfito-reducer) including research organisms indicator of sewage pollution (fecal coliforms) is also carried out, confirmed and interpreted by microbial load sizeable presence, the largest is located south of the city. Studying the spatiotemporal variation of the chemical and microbiological composition of groundwater in Béchar city identifies the intensity of this impact that influx directly on its quality.

Environnement, Ingénierie & Développement, 2009

Le but recherché par ce travail est la mise en évidence de l'impact d'une mine de fer aba... more Le but recherché par ce travail est la mise en évidence de l'impact d'une mine de fer abandonnée sur la qualité des eaux de la plaine de Bekkaria. La mine de Khanguet présente des minerais polymétalliques ferrifères. L'hétérogénéité de la minéralisation nous a conduit à prendre en considération les éléments traces métalliques (ETM) pouvant être mêlés au fer. L'exploitation de la mine se faisait à ciel ouvert et le minerai extrait était transporté sur plusieurs kilomètres, puis déposé sans précaution avant son transport vers le port de Annaba pour son exportation vers l'étranger. L'exploitation de cette mine s'arrêta en 1966 mais la pollution sévit toujours car les résidus des terrils sont amassés en aval de l'oued Kebir. Ces terrils sont exposés aux aléas climatiques. Les poussières sont transportées par les vents vers d'autres zones ou infiltrées avec les eaux de précipitations. La conséquence est la contamination des eaux des nappes superficiell...

Hydrological Sciences Journal, 2017

RÉSUMÉ Un site aquifère contaminé, situé en bordure de l’oued Meboudja (Annaba, Algérie), a été c... more RÉSUMÉ Un site aquifère contaminé, situé en bordure de l’oued Meboudja (Annaba, Algérie), a été caractérisé en mettant en place une surveillance de la qualité des eaux de surface et souterraines affectées par les nombreux rejets industriels et urbains sur une période de 11 ans (1999−2009). Les déchets industriels sont déposés directement sur le sol et les effluents sont déversés dans l’oued Meboudja sans aucun traitement préalable. Les eaux souterraines présentent une conductivité électrique élevée (de 1000 à 6000 μS/cm), de fortes teneurs en chlorure et en sodium avec respectivement un maximum de 1400 et 730 mg/L. Partant des résultats de l’analyse en composantes principales effectuée sur 33 puits en juillet 2009, les trois principaux processus responsables de l’évolution chimique observée au niveau de l’aquifère ont été identifiés: (a) l’apport salifère du lac Fetzara et le lessivage des formations métamorphiques carbonatées (responsables de l’augmentation de la minéralisation) ; (b) l’alimentation de la nappe par les eaux de l’oued Meboudja, recevant de nombreux polluants industriels (responsable des fortes teneurs en fer et en manganèse) ; et (c) l’utilisation des produits chimiques dans l’agriculture (responsable de l’augmentation des teneurs en nitrates). Les fortes minéralisations sont enregistrées notamment dans les puits situés à proximité des rejets industriels. En outre, de fortes concentrations métalliques en fer et en manganèse sont observées dans les eaux de l’oued. L’évolution de ces deux éléments dans les eaux de la nappe au cours d’un cycle hydrologique montre que l’augmentation des teneurs est liée notamment à une réalimentation de la nappe par l’oued et à une mauvaise oxygénation de la nappe. L’existence de niveaux argileux peut en effet jouer le rôle d’écran en surface et favoriser les conditions réductrices dans la nappe. La Meboudja agit par conséquent comme une source diffuse de contaminants tout au long de son parcours. Les caractéristiques hydrodynamiques de l’aquifère ont été estimées à l’aide de l’interprétation des données des pompages d’essai effectués dans plus d’une dizaine de puits. Des modèles d’écoulement et de transport de polluants ont été élaborés en utilisant le code MODFLOW-MT3D. L’ampleur de la migration des contaminants a été évaluée pendant une période de 11 ans (1999−2009). L’interaction oued-nappe est considérée comme responsable de la migration des contaminants dans la plaine de la Meboudja. EDITEUR Z. W. Kundzewicz EDITEUR ASSOCIÉ C. Leduc