A geophysical study carried out in the framework of the water resources recognition within the Essaouira coastal area (Morocco) enabled to outline the spatial distribution of the Plio-Pleistocene and Cretaceous formations. It helped to determine the thickness and extension of the main aquifer used for irrigation purpose. The overall aim of this study is to highlight the hydrogeological structures of Essaouira Basin.

A total of 45 vertical electrical soundings (VES) were measured using linear Schlumberger array configuration with a maximum half-length (AB/2) of 1000 m along eight sections of 126 km total length. The number of soundings constituting the eight VES profiles depends on the topography and the obstacles encountered. The VES data were processed and interpreted. According to the thematic maps of the study area, the results indicate the existence of three types of VES with apparent resistivity values ranging from 44 to 320 Ω.m. In relationship with wells and mechanical drillings existing in the area, the analysis of the results obtained made it possible to derive from the quantitative and qualitative maps the different apparent resistivity variations of the aquifer and aquiclude geological layers.

The careful examination of these maps shows that the region around the Qsob River is of interest from a hydrogeological point of view. It is represented by a significant thick layer given the large extension of the resistive Plio-Pleistocene and Cretaceous formations. Geophysical studies show that this region is partially protected from marine intrusion given its location between Tidzi Diapir and hidden diapir from Essaouira which little plays the role of barrier. It is crossed by the Qsob River which lends itself as the main source of both these layers. The electrical discontinuities emerging from the superposition of the different maps, E-W, NE-SW and NNE-SSW oriented, are abundant and dense in the north Haha region (Qsob River). Generally, the salt water circulates along these discontinuities from West to North and Northeast which explains the abundance of low apparent resistivity values recorded northeastwards. This geophysical reconnaissance is the most important for water supply of this area affected by increasingly long periods of drought.

在索维拉沿海地区（摩洛哥）的水资源识别框架内进行的地球物理研究能够勾勒出上新世和白垩纪地层的空间分布。它有助于确定用于灌溉目的的主要含水层的厚度和延伸。本研究的总体目标是突出索维拉盆地的水文地质结构。

使用最大半长 (AB/2) 为 1000 m 的线性 Schlumberger 阵列配置，沿着总长度为 126 km 的八个部分，总共测量了 45 次垂直电测深 (VES)。构成八个 VES 剖面的探测数量取决于地形和遇到的障碍。对 VES 数据进行处理和解释。根据研究区的专题图，结果表明存在三种视电阻率值范围为44至320Ω.m的VES。与该地区现有的井和机械钻井有关，对所得结果的分析使得可以从定量和定性图中推导出含水层和含水层地质层的不同视电阻率变化。

对这些地图的仔细检查表明，从水文地质的角度来看，Qsob 河周围的地区是值得关注的。鉴于电阻性上新世和白垩纪地层的大范围延伸，它以显着的厚层为代表。地球物理研究表明，由于该地区位于 Tidzi Diapir 和来自索维拉的隐藏底辟之间，几乎没有起到屏障的作用，因此该地区部分受到了海洋入侵的保护。它被 Qsob 河穿过，该河是这两层的主要来源。在北哈哈地区（Qsob 河），由不同地图（EW、NE-SW 和 NNE-SSW）叠加产生的电不连续性丰富而密集。一般来说，咸水沿着这些不连续点从西到北和东北循环，这解释了向东北记录的大量低视电阻率值。此次地球物理勘察对于该地区受长期干旱影响的供水来说是最重要的。