SOIL SALINITY MAPPING IN THE IRRIGATED PERIMETER ZELBA OF THE REGION OF MAHDIA (TUNISIAN SAHEL)
Journal Title: Larhyss Journal - Year 2017, Vol 30, Issue 30
Abstract
In the region of Mahdia (Eastern Tunisia) perimeters are irrigated using saline waters coming from groundwater and deep aquifers. Consequences are therefore progressive soils salinization. In this context, this work was conducted in the perimeter of Zelba, of Mahdia region, irrigated by brackish water in order to assess the effects of these waters on soil quality. A study of the salinity spatial variation was carried out. Electrical conductivity maps were plotted using the ArcView GIS 3.2 software. Soil salinity mapping showed a slight spatial variation of the soil salinity in the different soil layers. This salinity increased slightly with soil depth. The increasing gradient of the salinity is due to leaching of salts with depth under irrigation. Mapping also showed that the southern part of the perimeter is the most affected by soil salinity. Indeed, the northern part is closer to the water drilling. Thus, it receives more water which favors the salts leaching with depth. The slight spatial variation of salinity is explained by the flat topography of the perimeter.
Authors and Affiliations
LOUATI D. | Département des Sciences de la Terre, Université de Sfax, Faculté des Sciences de Sfax, Rue de Soukra Km 4, Sfax, Tunisieو Hydrosciences Appliquées, Institut des Sciences et Techniques des Eaux de Gabes, Tunisie, MAJDOUB R. | Département du Génie des Systèmes Horticoles et du milieu naturel, Université de Sousse, Institut Supérieur Agronomique de Chott Mariem, Sousse, Tunisie, SELMANI S. | Ecole Nationale d’Ingénieur de Sfax, Université de Sfax, Rue de Soukra Km 4, Sfax, Tunisie, ACHOUR N. | Département des Sciences de la Terre, Université de Sfax, Faculté des Sciences de Sfax, Rue de Soukra Km 4, Sfax, Tunisie, HANNACHI N. | Département des Sciences de la Terre, Université de Sfax, Faculté des Sciences de Sfax, Rue de Soukra Km 4, Sfax, Tunisie, ABIDA H. | Département des Sciences de la Terre, Université de Sfax, Faculté des Sciences de Sfax, Rue de Soukra Km 4, Sfax, Tunisieو Hydrosciences Appliquées, Institut des Sciences et Techniques des Eaux de Gabes, Tunisie
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