Hydrochemical and isotopic characterization of a complex aquifer system

IF 0.8 Q4 WATER RESOURCES
Fayçal Toumi, Samir Hani, N. Bougherira, A. Hani, H. Chaffai, L. Djabri
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引用次数: 2

Abstract

A methodology was developed and applied to the Tindouf basin (south-western Algeria) to understand the hydrogeology of a complex aquifer system with a limited number of data, to identify the favorable areas for the design and building of new wells, and to know whether there is still current recharge of these aquifers. The principal components analysis (PCA), diagram of deuterium versus oxygen-18, and equilibrium diagrams Mg/Na and Ca/Na were the techniques used to combine different datasets in order to identify chemical and isotopic groups, which were in turn used to define the groundwater flow paths. In addition, on the basis of thermodynamic equilibrium, it is possible to define the chemical evolution of the Tindouf basin aquifer. The results of this study are consistent with the generally accepted hydrogeological conceptual model. The combination of the different methods made possible to define and and to characterise the main groundwater flow paths from their sources to the discharge zones. These flow paths are defined by water categories, which are represented by salinity and groundwater origin. This approach can be used to analyze aquifers characterized by a lack of data and can also be useful for studying other complex groundwater basins.
复杂含水层系统的水化学和同位素表征
开发了一种方法,并将其应用于廷杜夫盆地(阿尔及利亚西南部),以有限的数据了解复杂含水层系统的水文地质,确定设计和建造新井的有利区域,并了解这些含水层是否仍有补给。主成分分析(PCA)、氘-氧-18图以及平衡图Mg/Na和Ca/Na是用于组合不同数据集的技术,以确定化学和同位素基团,进而用于确定地下水流动路径。此外,在热力学平衡的基础上,还可以确定廷杜夫盆地含水层的化学演化。研究结果与公认的水文地质概念模型一致。不同方法的结合使确定和描述从源头到排放区的主要地下水流动路径成为可能。这些流动路径是由水的种类来定义的,由盐度和地下水来源来表示。这种方法可用于分析缺乏数据的含水层,也可用于研究其他复杂的地下水盆地。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
1.80
自引率
50.00%
发文量
36
审稿时长
8 weeks
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