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The Mediterranean coast stretching from Tangier to Ksar Sghir within the Tangier-Tetouan-Al Hoceima region represents a crucial coastal area. This region's coastal environment faces multiple challenges, including demographic pressures and the evolving impacts of climate change which result in sea-level rise. Our research takes a comprehensive approach, integrating sedimentary and mineralogical analysis, along with the application of GIS tools for data processing and visualization. Through this research, we aim to identify vulnerable coastal areas, particularly those susceptible to erosion, and assess the effects of climate change, specifically focusing on rising sea levels. This study's findings shed light on the dynamic coastal landscape and provide valuable insights for sustainable coastal management in the face of environmental change. Our study shows that the studied region suffers from significant losses in the surface area of sand on some beaches due to the phenomenon of erosion. At the same time, some beaches knew a set back the shoreline by several metres, and others knew to advance the shoreline by several metres. In this way, it constitutes a continuation of a development that began several centuries ago, and which has been observed in the Mediterranean coast between Tangier and Ksar Sghir coastlines in the context of a rapid rise in sea level.

Water erosion poses a significant environmental threat in the Mediterranean region, with pronounced impacts observed throughout Morocco. It impairs soil quality and disrupts both sediment transport and water availability. Contributing factors range from natural (climate, topography, and geology) to anthropogenic (land use, vegetation cover, and management). This study introduces an improved Priority Actions Program/Regional Activity Centre (PAP/RAC) model, enriched with GIS and the Caesium-137 (137Cs) technique, to investigate erosion within Morocco's Raouz basin. Enhanced with additional variables including soil types, slope length, rainfall erosion potential, slope orientation, soil moisture, and land surface temperature, the model transcends the classical approach, promoting granularity and precision in predictions. In addition to the comprehensive model, the 137Cs method, which discerns long-term soil erosion and redistribution, provides a dual-faceted validation, bolstering the robustness of this project's erosion risk evaluation. This study's outcomes underscore the gravity of the erosion hazard with significant soil depletion rates ranging from 8.1 to 20 t ha−1 yr−1, demonstrating the model's alignment with empirical data, affirming its utility. The modified PAP/RAC model concurs with the 137Cs data, demonstrating its usefulness for water erosion assessment and management in similar areas. • The modified PAP/RAC model enhances erosion prediction. •Model validated with extensive 137Cs data. •GIS integration identifies erosion hotspots. •A comparative study with global erosion data. • The model adapts to diverse Mediterranean climates. [ABSTRACT FROM AUTHOR]