Groundwater is widely used in the semi-arid region of Remila plain (Khenchela, Algeria) for urban and agricultural supplies. An integrated statistical and hydro-geochemical approach was performed with 70 water samples in order to identify the main processes and the origin of water salinisation. The results have suggested the dominance of three chemical facies: Sulphato cloruro calcic (SO4–Cl–Ca) in the northeastern part, Sulphato cloruro calci magnisian (SO–4Cl–Ca–Mg) in most of the waters andalkali-earth bicarbonate (HCO3–Ca–Mg) in the southeastern part. Although based on principal component analysis and hierarchical clustering analysis, the statistical approach identified three water groups: (1) saline water (17 %; total dissolved solids >1000 mg l−1 with the dominance of Sulphate (SO42−)); (2) moderately saline water (17 %) with a dominance of bicarbonate (HCO3−); and (3) moderately saline water (66 %) with mixed facies. The binary diagrams confirmed the predominance of three processes: evaporite dissolution and/or precipitation, combined by ionic exchange. In the northeastern part of the area, however, another process was detected – the saline intrusion of Sabkha water, favoured by extensive groundwater use.

中文翻译：

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综合统计和水文地球化学方法来确定 Remila 平原地下水（Khenchela，阿尔及利亚）盐水污染的起源和过程

地下水在雷米拉平原（阿尔及利亚肯切拉）的半干旱地区被广泛用于城市和农业供应。对 70 个水样进行了综合统计和水文地球化学方法，以确定水盐化的主要过程和起源。结果表明三种化学相的优势：硫酸盐氯化钙（SO4-Cl-Ca) 在东北部, Sulphato cloruro calci magnisian (SO-4Cl-Ca-Mg) 在大部分水域和碱土碳酸氢盐 (HCO3-Ca-Mg) 在东南部。尽管基于主成分分析和层次聚类分析，统计方法确定了三个水组：（1）盐水（17%；总溶解固体>1000 mg l-1以硫酸盐（SO42−)); (2) 以碳酸氢盐 (HCO) 为主的中等盐水 (17%)3-); (3) 混合相的中度咸水（66%）。二元图证实了三个过程的优势：蒸发岩溶解和/或沉淀，通过离子交换结合。然而，在该地区的东北部，发现了另一个过程——Sabkha 水的盐水侵入，这有利于地下水的广泛使用。