Evaluación de recursos de aguas subterráneas en calizas mediante relevamientos geoeléctricos y VLF-EM (Cuenca El Salloum, Egipto)

Translated title of the contribution: Groundwater resources evaluation in calcareous limestone using geoelectrical and VLF-EM surveys (El Salloum Basin, Egypt)

Fardous Zarif, Lee Slater, Mohamed Mabrouk, Ahmed Youssef, Ayman Al-Temamy, Salah Mousa, Karam Farag, Judy Robinson

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Understanding and developing groundwater resources in arid regions such as El Salloum basin, along the northwestern coast of Egypt, remains a challenging issue. One-dimensional (1D) electrical sounding (ES), two-dimensional (2D) electrical resistivity imaging (ERI), and very low frequency electromagnetic (VLF-EM) measurements were used to investigate the hydrogeological framework of El Salloum basin with the aim of determining the potential for extraction of potable water. 1D resistivity sounding models were used to delineate geoelectric sections and water-bearing layers. 2D ERI highlighted decreases in resistivity with depth, attributed to clay-rich limestone combined with seawater intrusion towards the coast. A depth of investigation (DOI) index was used to constrain the information content of the images at depths up to 100 m. The VLF-EM survey identified likely faults/fractured zones across the study area. A combined analysis of the datasets of the 1D ES, 2D ERI, and VLF-EM methods identified potential zones of groundwater, the extent of seawater intrusion, and major hydrogeological structures (fracture zones) in El Salloum basin. The equivalent geologic layers suggest that the main aquifer in the basin is the fractured chalky limestone middle Miocene) south of the coastal plain of the study area. Sites likely to provide significant volumes of potable water were identified based on relatively high resistivity and thickness of laterally extensive layers. The most promising locations for drilling productive wells are in the south and southeastern parts of the region, where the potential for potable groundwater increases substantially.

Translated title of the contributionGroundwater resources evaluation in calcareous limestone using geoelectrical and VLF-EM surveys (El Salloum Basin, Egypt)
Original languageSpanish
Pages (from-to)1169-1185
Number of pages17
JournalHydrogeology Journal
Volume26
Issue number4
DOIs
StatePublished - Jun 1 2018

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

Keywords

  • Arid regions
  • Egypt
  • Fractured rocks
  • Resistivity
  • VLF electromagnetics

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