The Qualitative Aspects of Water Resources at Annaba Region in the Mediterranea
Djabri, Larbi1; Hani, Azzedine1; Bouhsina, Saad2; Djouamaa, Mohamed Cherif3; Habes, Sameh1; Aoun Sebaiti, Badra1
1Laboratoire Ressource en Eau et Développement Durable. Annaba University, ALGERIA; 2Université de Dunkerque, FRANCE; 3Annaba University, ALGERIA
The studied area is agro industrial; it also lies in an area characterized by relatively high precipitation rates, ranging between 600 and 1200 mm / year. However the waters analyzed indicate a strong mineralization. The latter may have several origins:
- The first caused by the processes used in the industry such as steel mills in the region.
- The second is related to the return of irrigation water, which during their infiltration and in contact with different soils crossed acquire a new chemical composition that may influence the mineralization.
- Climatic factors through evaporation or dilution directly influence the mineralization.
The chemical analysis performed on samples show seasonal variations in mineralization. Indeed, during the rainy season the rainfall waters of less charged allow a dilution resulting in a decrease of salinity, but rather during the dry period, the intense evaporation leads to an increased in salinity. The isotopic analysis carried out on the deuterium, tritium and oxygen 18 (18O), indicate a neo-salinity of waters, which would be accelerated by the evaporation, confirmed by the deuterium-oxygen 18 relationship, characterized by high conductivity and high oxygen 18 values.
The study of Sr 2 + / Ca 2 + ratio, showed that the values oscillated around 2 ‰, which excludes a geological origin of waters salinity. The results obtained during this study show that in this region the waters salinity changes according to the climatic factors.