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<p>Subsurface cavities in Jebel Hafeet, Al-Ain City, United Arab Emirates, pose geohazard risks to infrastructure due to subsidence and ground instability. This study employed electrical resistivity tomography (ERT) and gravity methods to locate and characterize these cavities and assess their associated risk. The ERT survey was conducted using a pole-dipole array configuration along eight lines, with intermediate-resistivity (&gt; 45 Ohm.m) anomalies indicating cavities at depths between 1&#xa0;m and 16&#xa0;m below ground level and low-resistivity (&lt; 45 Ohm.m) zones suggesting water-saturated or clay-rich deposits. The gravity survey was observed at 28 stations, with the calculated Bouguer gravity values ranging from 97 to 103 mGal. The 3D inversion of the Bouguer gravity data revealed low-density anomalies interpreted as cavities, which were spatially consistent with the locations of high-resistivity zones in the ERT data. The 3D gravity inversion models revealed low-density zones, indicating cavities at depths of a few meters to 20&#xa0;m below ground level. Integrating ERT and gravity methods improved cavity detection in the study area, indicating a strong correlation between low-density and intermediate resistivity features. This research contributes to an improved geological and geohazard understanding of Jebel Hafeet, aiding sustainable urban planning, infrastructure safety, and risk mitigation in Al-Ain City.</p>

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Multimethod geophysical investigation for cavity detection in the Northwestern part of Jebel Hafeet area, Al-Ain, United Arab Emirates

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月20日

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  • Mai Alkaabi,
  • Hakim Saibi

摘要

Subsurface cavities in Jebel Hafeet, Al-Ain City, United Arab Emirates, pose geohazard risks to infrastructure due to subsidence and ground instability. This study employed electrical resistivity tomography (ERT) and gravity methods to locate and characterize these cavities and assess their associated risk. The ERT survey was conducted using a pole-dipole array configuration along eight lines, with intermediate-resistivity (> 45 Ohm.m) anomalies indicating cavities at depths between 1 m and 16 m below ground level and low-resistivity (< 45 Ohm.m) zones suggesting water-saturated or clay-rich deposits. The gravity survey was observed at 28 stations, with the calculated Bouguer gravity values ranging from 97 to 103 mGal. The 3D inversion of the Bouguer gravity data revealed low-density anomalies interpreted as cavities, which were spatially consistent with the locations of high-resistivity zones in the ERT data. The 3D gravity inversion models revealed low-density zones, indicating cavities at depths of a few meters to 20 m below ground level. Integrating ERT and gravity methods improved cavity detection in the study area, indicating a strong correlation between low-density and intermediate resistivity features. This research contributes to an improved geological and geohazard understanding of Jebel Hafeet, aiding sustainable urban planning, infrastructure safety, and risk mitigation in Al-Ain City.