Geophysical contribution based on vertical electrical sounding to hydrogeological evaluation in Ras Jebel coastal aquifer, Tunisia

IF 1.8 3区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Geophysical Prospecting Pub Date : 2024-07-01 DOI:10.1111/1365-2478.13568

Wissal Issaoui, Imen Hamdi Nasr, Rihab Guellala, Nassim HALLAL, Lamine Hamai, Mohamed Hédi Inoubli

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引用次数: 0

Abstract

The coastal aquifer of Ras Jebel is located in the northeastern governorate of Bizerte. It is formed by a Mio–Plio‐quaternary geological structure. The region of Ras Jebal is considered an important agricultural centre due to intensive groundwater exploitation. This overexploitation results in a decrease in piezometry and an increase in salinity. The groundwater piezometric study shows a decrease in the piezometric level of approximately −3.34 to −1.79 m in 2015. Our study based on vertical electrical sounding had the aim to monitor the salinity of the water table in 2017, which showed that refill transactions in the aquifer of Ras Jebel caused the improvement of the chemical quality of water. In fact, the salinity in the coastal zone is between 2.53 and 4.14 g/L. As for the resistivity, which reached 2 Ω m near the sea, the geophysical study based on the geoelectric method has provided an electrical image of the basement to clarify the basin structure. The use of an electrical prospection method to study the salinization of the water table of Ras Jebel has highlighted the contribution to the most origin of saltwater: natural origin (sea water intrusion) on the northeastern coast of Ras Jebel. This source is the main origin of the degradation of the quality of underground water resources in Ras Jebel.

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基于垂直电测对突尼斯拉斯杰贝勒沿海含水层水文地质评估的地球物理贡献

拉斯杰贝勒沿海含水层位于比泽尔特省东北部。它是由 Mio-Plio-quaternary 地质结构形成的。由于大量开采地下水，Ras Jebal 地区被视为一个重要的农业中心。过度开采导致压强下降，盐度上升。地下水压强研究显示，2015 年的压强水平下降了约 -3.34 至 -1.79 米。我们基于垂直电测深的研究旨在监测 2017 年地下水位的盐度，结果显示杰贝勒角含水层的回填交易导致水的化学质量得到改善。事实上，沿海地区的盐度在 2.53 至 4.14 克/升之间。至于电阻率，在近海处达到 2 Ω m，根据地电方法进行的地球物理研究提供了基底的电学图像，以澄清盆地结构。使用电探方法研究杰贝勒角地下水位的盐碱化，突出了盐水最主要的来源：杰贝勒角东北海岸的自然来源（海水入侵）。这一来源是造成杰贝勒角地下水资源质量下降的主要原因。

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

Geophysical Prospecting 地学-地球化学与地球物理

CiteScore

4.90

自引率

11.50%

发文量

118

审稿时长

4.5 months

期刊介绍： Geophysical Prospecting publishes the best in primary research on the science of geophysics as it applies to the exploration, evaluation and extraction of earth resources. Drawing heavily on contributions from researchers in the oil and mineral exploration industries, the journal has a very practical slant. Although the journal provides a valuable forum for communication among workers in these fields, it is also ideally suited to researchers in academic geophysics.