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Bouzelboudjen, Mahmoud

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Bouzelboudjen, Mahmoud
Affiliation principale
Email
Mahmoud.Bouzelboudjen@unine.ch

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  • Publication
    Accès libre
    TracES/View - Traçage des Eaux Souterraines : Application SIG en milieu karstique jurassien (Suisse)
    Bouzelboudjen, Mahmoud 
    ;
    Ornstein, Pascal
    ;
    Kimmeier, Francesco
    L'usage de traceurs artificiels est une méthode spécialement bien établie pour étudier les aquifères karstiques. Dans ce contexte, les traçages (avec des traceurs artificiels et biologiques) permettent de déterminer les limites des bassins versants, d'identifier la relation entre une perte et une résurgence, d'évaluer les phénomènes de diffluence, de déterminer le temps de transit, etc. Plus récemment les méthodes de traçage sont utilisées dans les études quantitatives de transport de polluant. Les essais de traçage prenant du temps et étant coûteux, une application (TracES/View) combinant les Systèmes d'Informations Géographiques (SIG) ArcInfo et ArcView, les deux couplés avec une base de données MS Access a été développée afin de planifier de façon efficace la réalisation de nouveaux essais de traçage. Une application utilisant ArcView, développée avec le language de programmation orienté-objets Avenue permet à des non-spécialistes en SIG d'accéder facilement aux éléments de la base de données des essais de traçage d'une manière graphique intuitive et interactive à l'écran. Utilisée conjointement avec d'autres cartes thématiques (la topographie, les surfaces structurales des formations géologiques, la délimitation des aquifères, les perméabilités, l'utilisation du sol, etc.), elle peut fournir un outil puissant d'aide à la décision pour la gestion des ressources en eaux souterraines., The use of artificial tracers is a specially well-established method to investigate karstic aquifers. In this case, tracing (artificial and biological tracers) enables to delimit watercatchment boundaries, to identify relation between a sinkhole and an outlet, to assess diffluent phenomena, transit time, etc. More recently tracer methods have been used in pollution transport studies. Tracer studies being time-consuming and expensive, an application (TracES/View) combining ArcInfo and ArcView Geographical Information Systems (GIS), both coupled with MSAccess database has been developped to provide an efficient way to plan the implementation and the planning of new tracer tests. An ArcView application developped with Avenue object-oriented scripting language allows GIS non-specialists to easily access data from tracer tests database in an interactive and intuitive way. Used in conjunction with other thematic maps (hydraulic conductivity, landuse, groundwater resources, and so on), it can provide a powerful decision-support tool for groundwater resources management.
  • Publication
    Métadonnées seulement
    Impact des changements climatiques sur le comportement des systèmes aquifères
    (Hochschulverlag AG an der ETH Zürich, 1997)
    Bouzelboudjen, Mahmoud 
    ;
    Kimmeier, Francesco
    ;
    Rossier, Yvan
    ;
    Eisenlohr, Laurent
    ;
    Kilary, Laszlo
    ;
    Zwahlen, François 
  • Publication
    Métadonnées seulement
  • Publication
    Accès libre
    GIS Vector and Raster Database, Advanced Geostatistics and 3-D Groundwater Flow Modelling in Strongly Heterogeneous Geologic Media: An Integrated Approach
    Bouzelboudjen, Mahmoud 
    ;
    Kimmeier, Francesco
    The aquifers of the Rhône valley in Switzerland are of great economic importance. The groundwaters are exploitable at slight costs. However, their situation make them specially vulnerable. The aim of this paper is to give a brief outlook on the methodology to build a very powerful three dimensional hydrogeological model. This model will be used by the community of Valais as a tool for the management and protection of the groundwater. ArcInfo [9] and ArcView [10] are employed as geographic information system and Oracle [15] and Access [1] as database management system on workstation and personal computer. The advanced geostatistical treatment of spatial basic data is carried out through several techniques (Surfer [17], Isatis [11] and ArcInfo). The 3-D hydrogeological mathematical model are based on the finite element method (Feflow [7] and FEN derived from FEM 301 [14]).
  • Publication
    Métadonnées seulement
    Serological signature of tick-borne pathogens in Scandinavian brown bears over two decades
    (2015-7-28)
    Jones, Krista L.
    ;
    Evans, Alina L.
    ;
    Jacquet, Maxime 
    ;
    Lienhard, Reto
    ;
    Bouzelboudjen, Mahmoud 
    ;
    Arnemo, Jon M.
    ;
    Swenson, Jon E.
    ;
    Voordouw, Maarten 
    Background: Anthropogenic disturbances are changing the geographic distribution of ticks and tick-borne diseases. Over the last few decades, the tick Ixodes ricinus has expanded its range and abundance considerably in northern Europe. Concurrently, the incidence of tick-borne diseases, such as Lyme borreliosis and tick-borne encephalitis, has increased in the human populations of the Scandinavian countries. Methods: Wildlife populations can serve as sentinels for changes in the distribution of tick-borne diseases. We used serum samples from a long-term study on the Scandinavian brown bear, Ursus arctos, and standard immunological methods to test whether exposure to Borrelia burgdorferi sensu lato, the causative agent of Lyme borreliosis, and tick-borne encephalitis virus (TBEV) had increased over time. Bears had been sampled over a period of 18 years (1995-2012) from a southern area, where Ixodes ricinus ticks are present, and a northern area where ticks are uncommon or absent. Results: Bears had high levels of IgG antibodies against B. burgdorferi sensu lato but not TBEV. Bears at the southern area had higher values of anti-Borrelia IgG antibodies than bears at the northern area. Over the duration of the study, the value of anti-Borrelia IgG antibodies increased in the southern area but not the northern area. Anti-Borrelia IgG antibodies increased with the age of the bear but declined in the oldest age classes. Conclusions: Our study is consistent with the view that ticks and tick-borne pathogens are expanding their abundance and prevalence in Scandinavia. Long-term serological monitoring of large mammals can provide insight into how anthropogenic disturbances are changing the distribution of ticks and tick-borne diseases.
  • Publication
    Métadonnées seulement
  • Publication
    Métadonnées seulement
    Coupes géologiques et hydrogéologiques. 2ème partie : hydrogéologie. Représentation schématique des écoulements souterrains en Suisse.
    (: Institut de Géographie de l'Université de Berne Office fédéral de la Topographie Berne Service Hydrologique et Géologique National Berne, 1997)
    Bouzelboudjen, Mahmoud 
    ;
    Kiraly, Laszlo 
    ;
    Kimmeier, Francesco
    ;
    Zwahlen, François