[ Contribution de l'analyse multivariée et des SIG pour la caractérisation hydrochimique de la nappe phréatique de la plaine de Sidi Bouzid (Tunisie centrale) ]
Volume 15, Issue 3, April 2016, Pages 667–684
Kaouther Ncibi1, Noureddine Gaaloul2, and Anis Gasmi3
1 Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire, 2092 El Manar, Tunisia
2 Institut National des Recherches en Génie Rural, Eaux, Forêts, Rue Hédi Karray BP. 10, 2080 Ariana, Tunisia
3 Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire, 2092 El Manar, Tunisia
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This study attempts to define the various geochemical processes responsible for the phreatic groundwater chemical evolution, using statistical methods and hydrochemical approaches. The phreatic aquifer in the plain of Sidi Bouzid is located in central Tunisia, the latter is characterized by an semi-arid to arid climate and irregular rainfall. The chemical water classification shows the dominance of a chlorinated calcium and magnesium sulfate type facies. The mineral-water interaction is at the expense of sulphates and to a lesser extent with carbonates. A statistical analysis of the physico-chemical data has been performed by the principal component analysis, a total of three components has been extracted, as it represents 87.040% of the total variance of the all data. The projection of the variables on the factorial designs shows two groups of individuals: the first grouping is where the highest concentrations of total dissolved solids, potassium, chlorides and sodium were observed, the second grouping consists of individuals where the water is less mineralized located upstream of the basin. The evaluation of the suitability of water for irrigation is provided by the calculation of various parameters. According to the results obtained 48.75% of the area of the plain is excellent, 26.71% is good, 13.60% is permissible and 10,94% unsuitable for irrigation. The areas of these zones are respectively 312; 171; 87 and 70 km2
Author Keywords: Principal Component Analysis, GIS, hydrochemistry, irrigation, water resources, Sidi Bouzid.
Volume 15, Issue 3, April 2016, Pages 667–684
Kaouther Ncibi1, Noureddine Gaaloul2, and Anis Gasmi3
1 Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire, 2092 El Manar, Tunisia
2 Institut National des Recherches en Génie Rural, Eaux, Forêts, Rue Hédi Karray BP. 10, 2080 Ariana, Tunisia
3 Faculté des Sciences de Tunis, Université de Tunis El Manar, Campus Universitaire, 2092 El Manar, Tunisia
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This study attempts to define the various geochemical processes responsible for the phreatic groundwater chemical evolution, using statistical methods and hydrochemical approaches. The phreatic aquifer in the plain of Sidi Bouzid is located in central Tunisia, the latter is characterized by an semi-arid to arid climate and irregular rainfall. The chemical water classification shows the dominance of a chlorinated calcium and magnesium sulfate type facies. The mineral-water interaction is at the expense of sulphates and to a lesser extent with carbonates. A statistical analysis of the physico-chemical data has been performed by the principal component analysis, a total of three components has been extracted, as it represents 87.040% of the total variance of the all data. The projection of the variables on the factorial designs shows two groups of individuals: the first grouping is where the highest concentrations of total dissolved solids, potassium, chlorides and sodium were observed, the second grouping consists of individuals where the water is less mineralized located upstream of the basin. The evaluation of the suitability of water for irrigation is provided by the calculation of various parameters. According to the results obtained 48.75% of the area of the plain is excellent, 26.71% is good, 13.60% is permissible and 10,94% unsuitable for irrigation. The areas of these zones are respectively 312; 171; 87 and 70 km2
Author Keywords: Principal Component Analysis, GIS, hydrochemistry, irrigation, water resources, Sidi Bouzid.
Abstract: (french)
L’aquifère de la plaine de Sidi Bouzid se situe dans un bassin néogène qui repose en partie sur le Trias extrusif, occupant un plateau pénéplané qui se situe entre la structure jurassique écaillée de l’Axe Nord-Sud à l’Est et les structures en anticlinaux crétacés faiblement plissés de l’Atlas tunisien à l’Ouest. Cette zone est caractérisée par un climat aride à semi-aride et des précipitations irrégulières. La classification chimique des eaux montre la dominance d’un faciès de type chloruré et sulfaté calcique et magnésien. L’interaction eaux-minéraux se fait aux dépens des sulfates et de façon moindre avec les carbonates. L’analyse statistique des données physico-chimiques a été réalisée par l’analyse en composante principale, un total de trois composantes a été extrait, où il représente 87,04 % de la variance totale. La projection des variables sur les plans factoriels montrent deux regroupements d’individus : le premier regroupement présent les concentrations les plus élevées de total des sels dissous, potassium, chlorures et sodium a été observé à l’Est de la zone d’étude, le deuxième regroupement est constitué des individus où les eaux sont moins minéralisées situé à l’amont de la nappe. L’évaluation de l’aptitude des eaux à l’irrigation est présentée par le calcul de divers paramètres. Selon les résultats obtenus 48,75 % de la superficie de la plaine est excellente, 26,71 % est bonne, 13,60 est médiocre et 10,94 % n’est pas adaptée pour l'irrigation qui sont de mauvaise qualité. Les superficies de ces différentes zones sont respectivement de 312 ; 171 ; 87 et 70 km2.
Author Keywords: Analyse en Composante Principale, SIG, hydrochimie, irrigation, ressource en eaux, Sidi Bouzid.
How to Cite this Article
Kaouther Ncibi, Noureddine Gaaloul, and Anis Gasmi, “Contribution of the multivariate analysis and the GIS for Hydrochemical characterization of phreatic aquifer to the plain of Sidi Bouzid (Central Tunisia),” International Journal of Innovation and Applied Studies, vol. 15, no. 3, pp. 667–684, April 2016.
