SOIL SALINITY MAPPING IN THE IRRIGATED PERIMETER ZELBA OF THE REGION OF MAHDIA (TUNISIAN SAHEL)

D. LOUATI, R. MAJDOUB, S. SELMANI, N. ACHOUR, N. HANNACHI, H. ABIDA

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.

Keywords


Brackish waters; Soil; Salinity; Mapping; ArcView GIS 3.2; Mahdia

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References


BEN HASSINE, H., 2005. Effets de la nappe phréatique sur la salinisation des sols de cinq périmètres irrigués en Tunisie. J. Etude et gestion des sols. 12, pp. 281-300.

BRESLER, E., MCNEAL, B.L., Carter, D.L., 1982. Saline and sodic soil: Springer-verlag, Berlin, Heidelberg, New York, 236 pages.

CHARFI, F., EL HABAIEIB, A., 1995. L’aménagement de l’espace industriel à Sfax : une opportunité économique mais des contraintes écologiques. In : L’Aménagement Face au Défi de l’Environnement, Collection Adicueer, Paris, pp. 105 -117.

COQUET, Y., VACHIER, P., LABAT, C., 2005. Vertical variation of near saturated hydraulic conductivity in three soil profiles. J. Geoderma. 126 (3-4), pp. 181-191.

DURAND, J.H., 1958. Les sols irrigables. Etude pédologique. ED. Imbert, Algerie, 190 pages.

FAO, 2002. Wetland development and management in SADC countries. Proceedings of a sub-regional workshop, 19-23 November 2001, Harare, Zimbabwe. Editors: Karen Frenken and Isiah Mharapara. FAO-SAFR, Harare, 190 pages.

GAPON, E.N., 1933. Theory of exchange adsorption in soils. J. Gen. Chem. USSR. 3.2, pp. 144-152.

KOLLER, E., 2004. Traitement des pollutions industrielles : Eau, Air, Sols, Boues. Ed, Dunod, 424 pages.

LAAJIMI, A., 2007. Les périmètres irrigués en Tunisie. Un enjeu pour le développement de la production agricole. Les notes d’alerte du CIHEAM 30, 3 pages.

LAYACHI, G., OMAR, G., ABDERRAHMANE, B., MOHAMED, L., CLAUDE, M., 2012. Evaluation de la salinité des eaux souterraines utilisées en irrigation et risques de dégradation des sols : exemple de la plaine de Meskiana (nord-est Algérien). J. Physio-Géo. 6, pp. 141-160.

LOUATI, D., MAJDOUB, R., ABIDA, H., 2014. 30 years saline water irrigation effects on soil characteristics, International Journal of Engineering and Technical Research. 2 (5), pp. 5-13.

MAJDOUB, R., HACHICHA, M., EL AMRI, A., MELKI, M., 2012. Etude de la dynamique de l’eau et du transfert des sels dans un sol sablo-limoneux du Sahel Tunisien. Eur. J. Sci. Res. 80, 499-507.

MATHIEU, C., PIELTAIN, F., 1998. Analyse physique des sols. Méthodes choisies. Techniques et documentation, Paris, pp. 21-49.

MTIMET, A.,1999. Atlas Tunisian soils. Agricultural ministry. Tunisia.

NOOMENE, H., 2011. Etude de la salinité des sols par la méthode de détection électromagnétique dans le périmètre irrigué de Kalaat Landelous en Tunisie : Cas d’une parcelle de courge. Mastère de recherche en environnement. Faculté des lettres, des arts et des humanités Manouba, Tunisi, 120 pages.

RODIER, J., BAZIN, C., BOURTIN, J.P., CHAMBON, P., RODI, L., 2005. L’analyse de l’eau : Eau naturelle, eau résiduaire, eau de mer. Ed, Dunod, Paris. 8ème Ed. 1383, pages.

USSL, 1954. Diagnosis and improvement of saline and alkali soils. US Department of Agriculture, Handbook n°60, U.S. Gov. Print. Office, Washington D.C, 160 pages.

YOKA, J., LOUMETO, J.J., VOUIDIBIO, J., AMIAUD, B., EPRON, D., 2010. Influence du sol sur la répartition et la production de phytomasse de savanes de la cuvette congolaise (République du Congo). Geo. Eco. Trop. 34, pp. 63-74.


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