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Journal of Failure Analysis and Prevention

, Volume 16, Issue 2, pp 216–224 | Cite as

Failure of a Vertical Drainage System Installed to Fight the Rise of Groundwater in El-Oued Valley (SE Algeria): Causes and Proposed Solutions

  • Salim Khechana
  • Abdelmonem Miloudi
  • Ali Ghomri
  • El Habib Guedda
  • El-Fadel Derradji
Technical Article---Peer-Reviewed

Abstract

El-Oued Valley suffers from the problem of rising groundwater which affects agricultural and urban areas and degrades all aspects of the socioeconomic life of its inhabitants. This problem, which appeared in the 1980s, is primarily a result of overexploitation of deep groundwater, lack of sanitation network, and discharge of wastewater directly into the unconfined aquifer. To solve this problem, a megaproject was carried out, based on the principle of sewerage, to drain and evacuate excess water after treatment to a discharge site 70 km north of the region. In this project, the blade of groundwater above elevation of 60 m should be drained through wells of a vertical drainage system. However, the expected results have not been achieved in most affected cities, where the groundwater level continues to rise. Herein, we propose a solution to this problem, based on a new explanation of the hydrogeological structure of the unconfined aquifer that drives the rising groundwater to the surface. The main part of this research is based on interpretation of well tests carried out in wells of the vertical drainage system.

Keywords

El-Oued Valley Rising groundwater Unconfined aquifer Vertical drainage system Hydrogeological structure Well tests 

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Salim Khechana
    • 1
  • Abdelmonem Miloudi
    • 1
  • Ali Ghomri
    • 1
  • El Habib Guedda
    • 1
  • El-Fadel Derradji
    • 2
  1. 1.Faculty of Sciences and TechnologyEl-Oued UniversityEl-OuedAlgeria
  2. 2.Laboratory of GeologyBadji Mokhtar UniversityAnnabaAlgeria

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