—The hydrochemistry of the saline system in high arid environment is controlled by several processes including evaporation, water-rock interaction, precipitation /dissolution etc. Hydrochemical data of 80 wells from the catchment area of sabkha Oum leKhialate, southern Tunisia and 9 parameters (pH, TDS, Na +
, Ca2 +
, SO 4 2-
) show that the abundance of major ions from the sabkha is as follows: Na>Ca>Mg>K and SO 4
. Multivariate statistical analysis methods such us correlation analysis, principal compo
nent analysis (PCA) and hierarchical cluster analysis (HCA) were used to identify the geoc
hemical processes controlling the chemistry of saline water in the catchment area of the sabkha. HCA reveals four major water groups (C1-C4). Samples of the sabkha from clusters C1, C2 to C3 have Na-SO 4
-Cl, Na-SO 4
nd Na-Cl-SO 4
ctively. Samples from C4 show Ca-HCO 3
-Cl water type are located in re
charge area. Using PCA, two factors account for 72.69 % of the total variance of th
e data set. Res
ults of statistical analysis reveal that the major source of sulfate sodium deposit is the process of evaporation, cationic exchange between Ca and Na in clay formation and mineral precipitation.
—Hydrochemistry, saline system, statistical analysis, evaporation.
Nasri Nesrine and Bouhlila Rachida are with Ecole Nationale d’Ingénieurs de Tunis, Laboratoire de Modélisation en Hydraulique et Environnement, Université de Tunis El Manar, 1002 Tunis, Tunisie (e-mail: email@example.com, firstname.lastname@example.org).
Riadh Ahmed is with Sté Chimique ALKIMIA (e-mail: email@example.com).
Cite:Nasri Nesrine, Bouhlila Rachida, and Riadh Ahmed, "Multivariate Statistical Analysis of Saline Water — A Case Study: Sabkha Oum LeKhialate (Tunisia)," International Journal of Environmental Science and Development vol. 6, no. 1, pp. 40-43, 2015.