Water (Mar 2021)

Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco

  • Meryem Touzani,
  • Ismail Mohsine,
  • Jamila Ouardi,
  • Ilias Kacimi,
  • Moad Morarech,
  • Mohamed Habib El Bahajji,
  • Tarik Bouramtane,
  • Abdessamad Tiouiouine,
  • Suzanne Yameogo,
  • Badr El Mahrad

DOI
https://doi.org/10.3390/w13070961
Journal volume & issue
Vol. 13, no. 7
p. 961

Abstract

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The main landfill in the city of Rabat (Morocco) is based on sandy material containing the shallow Mio-Pliocene aquifer. The presence of a pollution plume is likely, but its extent is not known. Measurements of spontaneous potential (SP) from the soil surface were cross-referenced with direct measurements of the water table and leachates (pH, redox potential, electrical conductivity) according to the available accesses, as well as with an analysis of the landscape and the water table flows. With a few precautions during data acquisition on this resistive terrain, the results made it possible to separate the electrokinetic (~30%) and electrochemical (~70%) components responsible for the range of potentials observed (70 mV). The plume is detected in the hydrogeological downstream of the discharge, but is captured by the natural drainage network and does not extend further under the hills.

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