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<p>This study develops a detailed fracture map of the Inner Rif region, extending from Ceuta to Jebha, in order to assess its susceptibility to landslides and to highlight structural controls on groundwater circulation. Geological maps were georeferenced and digitized to extract faults and calculate their orientations, while remote sensing methods were used to identify lineaments from Landsat 8 (OLI/TIRS) imagery. Automatic and manual extractions were validated against geological maps and previous studies. The fracture map reveals three dominant fault families oriented N-S, NE-SW, and E-W, with the highest fracture densities concentrated in the calcareous ridge. This distribution is linked to the lithological and tectonic characteristics of the unit, which promote intense fracturing of calcareous-dolomitic rocks. The results demonstrate that structural features strongly influence slope stability and aquifer connectivity, reinforcing the hydrogeological significance of the studied faults. This work provides new insights into the geodynamic evolution of the Rif-Alboran system and emphasizes the need for further geophysical and hydrogeological investigations.</p>

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Lineament and fracture mapping of the Inner Rif, from Ceuta to Jebha, using Landsat 8 (OLI/TIRS)

  • 期刊论文

  • 发表日期：

    2026年3月31日

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  • Sanaa El Aoudati,
  • Hamza Ben Lahmar,
  • Marouane Benmakhlouf,
  • Youssouf El Jarjini,
  • Afaf Amine,
  • Abdelouahed Ouazani Touhami

摘要

This study develops a detailed fracture map of the Inner Rif region, extending from Ceuta to Jebha, in order to assess its susceptibility to landslides and to highlight structural controls on groundwater circulation. Geological maps were georeferenced and digitized to extract faults and calculate their orientations, while remote sensing methods were used to identify lineaments from Landsat 8 (OLI/TIRS) imagery. Automatic and manual extractions were validated against geological maps and previous studies. The fracture map reveals three dominant fault families oriented N-S, NE-SW, and E-W, with the highest fracture densities concentrated in the calcareous ridge. This distribution is linked to the lithological and tectonic characteristics of the unit, which promote intense fracturing of calcareous-dolomitic rocks. The results demonstrate that structural features strongly influence slope stability and aquifer connectivity, reinforcing the hydrogeological significance of the studied faults. This work provides new insights into the geodynamic evolution of the Rif-Alboran system and emphasizes the need for further geophysical and hydrogeological investigations.