The North Gabes-El Hamma region is located in the south of Tunisia at the northern limit of the Saharan platform. It has been the subject of several geological, mining and especially hydrogeological studies. These studies aim to evaluate the underground water potentialities of this region in order to exploit them in a rational way.

It is within this framework that the present study is carried out, and it concerns the reinterpretation of 124 Vertical Electrical Soundings (VES) covering the study area. This study aims first to highlight aquifers and then to characterize them geometrically (thickness, depth and lateral extensions). To achieve this, the interpretation of the VES was carried out first in a qualitative way (establishment of apparent iso-resistivity maps and pseudosections) and then in a quantitative way (calibration of the VES on water boreholes, establishment of geoelectric sections and the roofs isobath and isopach maps of aquifer levels).

From the hydrostratigraphic point of view, the results show that the North Gabes-El Hamma region is characterized by the presence of two aquifers. The first one is superficial, with limited potentialities and would be constituted by heterogeneous silico-clastic series of mio-plio-quaternary age (MPQ) characterized by geoelectric levels of quite variable resistivities. The second aquifer is deeper, with higher potentialities and would be constituted by Lower Senonian carbonate series (SIC) characterized by resistivities between 15 and 28 Ω m.

From the structural point of view, the region is affected by intense fracturing in two main directions: NE-SW and NW-SE. The role of these faults, some of which are already known, is very important since they have subdivided the region into high zones (horsts) where the SIC would be eroded (with variable intensities) and low zones (grabens) where the SIC would be preserved under a thick MPQ cover. Moreover, these faults facilitate the lateral and especially vertical flow of groundwater and contribute to intercommunication between aquifers.

In order to orient and rationalize the exploitation of the different aquifers of the North Gabes-El Hamma region, a synthetic map presenting their characteristics (geographical distribution and depths) has been established.

北加贝斯-哈马地区位于突尼斯南部，撒哈拉地台的北端。它已成为几项地质，采矿，尤其是水文地质研究的主题。这些研究旨在评估该地区的地下水潜力，以便以合理的方式加以利用。

在此框架内进行了本研究，它涉及对覆盖研究区域的124个垂直电测深（VES）的重新解释。这项研究的目的是首先突出显示含水层，然后以几何形式（厚度，深度和侧向延伸）对它们进行表征。为此，首先以定性的方式（建立表观等电阻率图和伪剖面）对VES进行解释，然后以定量的方式（在水井中对VES进行校准，建立地电剖面和屋顶来进行VES的解释）等深线和含水层等值线图）。

从水文地层学的角度来看，结果表明北加布斯-哈马地区的特征是存在两个含水层。第一个是表面的，具有有限的潜力，将由微-叠-第四纪（MPQ）的异质硅碎屑系列构成，其特征是电阻率变化很大的地电水平。第二个含水层较深，具有较高的电势，并且由电阻率在15至28Ωm之间的下塞诺期碳酸盐系列（SIC）构成。

从结构的角度来看，该区域受到两个主要方向的强烈压裂影响：NE-SW和NW-SE。这些断层的作用（已经知道其中一些）非常重要，因为它们将区域划分为SIC将被侵蚀（强度可变）的高区（霍斯特）和SIC将被侵蚀的低区（grabens）。保留在厚厚的MPQ盖下。此外，这些断层有利于地下水的横向流动，尤其是垂直流动，并有助于含水层之间的相互通讯。

为了确定北加布斯-埃尔哈马地区不同含水层的开采方向并使其合理化，已建立了一个合成地图，显示了它们的特征（地理分布和深度）。