Evidence for an underground runoff and soil permeability at the Ouled Fayet (Algiers, Algeria) subsurface landfill pilot project from geophysical investigations

Results from geophysical investigations (electrical resistivity, electromagnetic mapping and seismic refraction) on an excavated cell of the Ouled Fayet (Algiers, Algeria) pilot landfill indicated the presence of an underground runoff and permeable soil underneath the cell. These results contradict...

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Bibliographic Details
Published in:Environmental earth sciences 2010-01, Vol.59 (5), p.1149-1158
Main Authors: Djadia, Leila, Machane, Djamel, Chatelain, Jean-Luc, Abtout, Abdesslam, Bensalem, Rabah, Guemache, Mehdi Amine, Guillier, Bertrand, Boudella, Amar, Oubaiche, El-Hadi
Format: Article
Language:English
Subjects:
Biogeosciences
Boreholes
Core drilling
Cores
Earth and Environmental Science
Earth Sciences
Earth, ocean, space
Electrical resistivity
Engineering and environment geology. Geothermics
Environmental Science and Engineering
Exact sciences and technology
Feasibility studies
Geochemistry
Geology
Geophysics
Geophysics: general, magnetic, electric and thermic methods and properties
Hydrology/Water Resources
Internal geophysics
Landfill
Landfills
Leachates
Original Article
Pilot projects
Pollution, environment geology
Runoff
Sciences of the Universe
Soil permeability
Terrestrial Pollution
Waste disposal sites
Water depth
Wave velocity
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Summary:Results from geophysical investigations (electrical resistivity, electromagnetic mapping and seismic refraction) on an excavated cell of the Ouled Fayet (Algiers, Algeria) pilot landfill indicated the presence of an underground runoff and permeable soil underneath the cell. These results contradict those obtained by a feasibility study, based, however, only on the analysis of seventy-six 10-m drilling cores. The 1D boreholes information has been proven to be insufficient and to give biased results. The presence of water at depth is evidenced by lower resistivity, high conductivity anomalies and increase of P-wave velocity. Thus, to the contrary of what is claimed in the feasibility study, a threat of leachate pollution is real. This study shows that landfill construction studies cannot give trustful results without geophysical investigations. More specifically, in Algeria, it is imperative to elaborate a landfill construction code, which should include mandatory geophysical prospecting and deeper drilling cores.
ISSN:1866-6280
1866-6299
DOI:10.1007/s12665-009-0105-6