Regionalization and Contribution to the Study of Reservoirs Sedimentation: Lakes of Cape Bon and the Tunisia Central

Sediment Transport and Morphodynamic

Identification des mécanismes de ruissellement dans un bassin versant méditerranéen : application des modèles hydrologiques au bassin versant de Béni Atta, Tunisie

Doctorat en sciences agronomiques et ingénierie biologique - UCL, 199

Water resources management in the Medjerda basin (Tunisia): assessment of hydrological impacts of climatic change in the Siliana and Béja catchments

Under the current conditions, water resources in Tunisia are intensively exploited and mobilized to meet the increasing demands of all water users. While these resources are limited, approximately estimated to 4,5 Milliards of m3, more than 50% of the total volume of renewable water is withdrawn and mainly used for agricultural purposes (80%). With almost 11 Million of inhabitants, the average of the annual available water volume per person is about 470 m3 which is clearly below the threshold of water scarcity sets to 500 m3/inh/year. Furthermore, water resources are unevenly distributed within the country. About 56% of available waters are surface waters against 44% of groundwater including deep and shallow aquifers. In addition, more than 80% of surface water is mainly from the North, 12% from the center and 8% from the south. One of the most important watercourses in Tunisia is the Medjerda. This river basin covers an area about 23,700 km2 and extends from across the border in Algeria up to the Gulf of Utica (Fig. 1). About 32% of the basin falls within Algeria and 68% in Tunisia (16,100 km2)

Water resources management in the Medjerda basin (Tunisia): assessment of hydrological impacts of climatic change in the Siliana and Béja catchments

Under the current conditions, water resources in Tunisia are intensively exploited and mobilized to meet the increasing demands of all water users. While these resources are limited, approximately estimated to 4,5 Milliards of m3, more than 50% of the total volume of renewable water is withdrawn and mainly used for agricultural purposes (80%). With almost 11 Million of inhabitants, the average of the annual available water volume per person is about 470 m3 which is clearly below the threshold of water scarcity sets to 500 m3/inh/year. Furthermore, water resources are unevenly distributed within the country. About 56% of available waters are surface waters against 44% of groundwater including deep and shallow aquifers. In addition, more than 80% of surface water is mainly from the North, 12% from the center and 8% from the south. One of the most important watercourses in Tunisia is the Medjerda. This river basin covers an area about 23,700 km2 and extends from across the border in Algeria up to the Gulf of Utica (Fig. 1). About 32% of the basin falls within Algeria and 68% in Tunisia (16,100 km2)

Gestion des ressources en eau dans la Medjerda: Modélisation hydrologique

La Medjerda est le seul cours d’eau pérenne en Tunisie. Le bassin versant est le plus important de la Tunisie en termes de ressources hydriques et contribue à près de 25% de l’ensemble des ressources mobilisables du pays. La compréhension fine de l’hydrologie de ce bassin versant anthropisé, dans un milieu fortement perturbé par des aménagements dont les objectifs sont parfois antagonistes (conservation, production, mobilisation,…), couplé à la problématique des changements climatiques dont plusieurs scénarios plaident en faveur d’une baisse significative des précipitations associée à un accroissement des températures, indiquant des ressources hydriques moins importantes pour des besoins plus élevés, reste donc un pré-requis à sa gestion durable

A comparative study on chemical composition, antibiofilm and biological activities of leaves extracts of four Tunisian olive cultivars

Olea europaea L. is one of the most important fruit trees in Tunisia because of its content of many potentially bioactive compounds. The aim of this study was to evaluate the chemical composition, antibiofilm, antiradical and acethylcholinesterase inhibitory activities from four Tunisian cultivars of Olea europaea L., i.e. ‘Chetoui’, ‘Meski’, ‘Oueslati’ and ‘Jarboui’. By means of standardized methods, total phenols were determined and some of them characterized by HPLC. The total phenols and flavonoids contents were found to be the highest in the leaves of Chetoui cultivar. The Chetoui cultivar exhibited an important antioxidant and anticholinesterasic activity and an important anti-biofilm activity against Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Candida albicans, Enterococcus faecalis and Escherichia coli, with percentages of inhibition comprised between 83 and 93% at 2xMIC values. Olive leaves extracts could be used in the control of bacterial biofilms in food and food-related&nbsp;environments.</p