Monitoring the integrity of electrically non-conductive geomembrane liners installed at waste sites using electrical geophysical techniques has been carried out for many years using above-liner leak location surveys and, more recently, below-liner monitoring systems. In this paper, the authors compare the theoretical response of both types of survey to a hole in a liner and then compare with measurements made in the field. The theoretical leak response indicates that above-liner surveys are sensitive to leaks over a greater area, although both responses result in comparable leak detectability. However, field data suggests that in practice, measurements made on a sparse grid below the liner have a greater sensitivity to certain leaks. This may be due to the differing leak geometries and background conditions present above and below the liner. Results indicate that a sparse below-liner monitoring grid, with its long-term monitoring capabilities, combined with above-liner surveys to pinpoint leaks accurately offer a successful approach to ensuring liner integrity for the lifetime of a lined waste site.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • TAYLOR, S B
    • White, C C
    • Barker, R D
  • Conference:
  • Publication Date: 1999-10


  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 157-174

Subject/Index Terms

Filing Info

  • Accession Number: 00794542
  • Record Type: Publication
  • ISBN: 0803126042
  • Report/Paper Numbers: STP 1358
  • Files: TRIS
  • Created Date: Jun 19 2000 12:00AM