Abstract
Coastal aquifers form the nexus between the marine and continental hydrologic system and are a crucial freshwater resource which supports the needs of coastal population. This paper provides an overview of the RHISS-NEKOR coastal aquifer, located in the north-eastern Morocco. The study also aimed to identify the impact of the gap between the rates of groundwater withdrawals and aquifer recharge on the piezometric conditions related to wet and rainy seasons. The resulting piezometric maps revealed that the aquifer tends to deplete, in the most productive areas adjacent to the Mediterranean coast, due to the influence of anthropogenic stressors that contribute to reducing the seaward flux of freshwater, consequently enhancing the landward penetration of seawater into the Nekor Ghiss groundwater. The hydraulic connection between the RHISS-NEKOR aquifer and saltwater, being an agent of freshwater deterioration, has led to the prevalence of highly conductive spots; the electrical conductivity range of values -between 1366 to 8920- are indicative of the presence of a significant amount of brackish and saline water with high mineralization rate at the groundwater table.
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