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<p>The Cretaceous Errachidia–Boudenib Basin in southeastern Morocco is of strategic hydrogeological importance due to its arid climate, irregular recharge, and increasing water demand. This study integrates gravity data analysis, remote sensing, and field measurements to characterise the deep structural framework that controls groundwater recharge and flow. Bouguer and residual gravity anomalies were processed using Total Horizontal Gradient (THG), Tilt Derivative (TDR), upward continuation, and Euler deconvolution. Landsat 8 imagery was enhanced through Principal Component Analysis (PCA) and directional Sobel filtering for automated and semi-automated lineament extraction, complemented by field fracture mapping. Results reveal two dominant fault systems trending NE–SW and NW–SE, some extending over 10 km, with dips and depths up to 2 km. These structures strongly correlate with field-measured fractures and are interpreted as major conduits for groundwater from the High Atlas toward the Cretaceous Basin. The integrated approach refines structural mapping beneath Quaternary cover, identifies key exploration corridors, provides a methodological framework for groundwater prospecting in arid basins, and offers solid support for sustainable groundwater development and structural modelling.</p>

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Integrated gravity and remote sensing analysis for hydrogeological characterisation of the Cretaceous Errachidia–Boudenib Basin, SE Morocco

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • Radouan Mehdaoui,
  • El-Mostafa Mili,
  • Brahim Ait Said,
  • Abdelmoula Mouloudi,
  • Younes Mamouch,
  • Abdelhak Sadiki Amari,
  • Rabia El Fakir

摘要

The Cretaceous Errachidia–Boudenib Basin in southeastern Morocco is of strategic hydrogeological importance due to its arid climate, irregular recharge, and increasing water demand. This study integrates gravity data analysis, remote sensing, and field measurements to characterise the deep structural framework that controls groundwater recharge and flow. Bouguer and residual gravity anomalies were processed using Total Horizontal Gradient (THG), Tilt Derivative (TDR), upward continuation, and Euler deconvolution. Landsat 8 imagery was enhanced through Principal Component Analysis (PCA) and directional Sobel filtering for automated and semi-automated lineament extraction, complemented by field fracture mapping. Results reveal two dominant fault systems trending NE–SW and NW–SE, some extending over 10 km, with dips and depths up to 2 km. These structures strongly correlate with field-measured fractures and are interpreted as major conduits for groundwater from the High Atlas toward the Cretaceous Basin. The integrated approach refines structural mapping beneath Quaternary cover, identifies key exploration corridors, provides a methodological framework for groundwater prospecting in arid basins, and offers solid support for sustainable groundwater development and structural modelling.