1887

Abstract

Summary

We adopted electromagnetic induction (EMI) and self-potential measurements along irrigation canal bank in order to detect groundwater seepage. The EMI methods is sensitive to the electrical conductivity of the subsoil, that is affected by the salt and clay content and water content. The depth of investigation depends on the soil electrical conductivity, the geometry of the instrument and the frequency of the electromagnetic field.

The experimental data refers to anintegrated survey along a transect on an irrigation canals (400 m). We acquired broadband electromagnetic data using a Profiler EMP400 (GSSI), with coil separation of 1.22 m and a bandwidth ranging from 1 to 15 kHz.

The self-potential measurements were performed with a fixed electrode and a moving electrode along the same transect of EMI measurements. The interval spacing among self-potential measurements was 2 m. Visual inspection of the canal permitted to compare the evidence of seepage losses with the geophysical anomalies. The results of self-potential measurements show peaks of electrical potential at the same position of electrical conductivity anomalies. Integration of the EMI survey and SP measurements is useful to detect seepage losses from canals: a more detailed analysis of self potential anomalies is required to reduce “false” alarms.

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/content/papers/10.3997/2214-4609.201413832
2015-09-06
2020-05-30
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References

  1. Akbar, N., Iqbal, M., EhsanullahIqbal A. and Khan, H.Z.
    [2011] Agro-qualitative response of two cultivars of chickpea to different sowing techniques under irrigated conditions of Faisalabad. Crop & Environment, 2, 19–23
    [Google Scholar]
  2. Darnet, M. and MarquisG.
    [2004] Modelling streaming potential (SP) signals induced by water movement in the vadose zone. Journal of Hydrology, 285, 114–124
    [Google Scholar]
  3. Ikard, S.J., Revil, A., Schmutz, M., Karaoulis, M., Jardani, A. and Mooney, M.
    [2014] Characterization of focused seepage through an earthfill dam using geoelectrical methods. Ground Water, 52, 952–65, doi: 10.1111/gwat.12151.
    https://doi.org/10.1111/gwat.12151 [Google Scholar]
  4. Ikard, SJ, Rittgers, J., Revil, A. and Mooney, MA.
    [ 2015 ] Geophysical investigation of seepage beneath an earthen dam. Ground Water, 53, 238–250, doi: 10.1111/gwat.12185.
    https://doi.org/10.1111/gwat.12185 [Google Scholar]
  5. Rodriguez-Diaz, J.A., Camacho Poyato, E. and Lopez-Luque, R.
    [2004] Application of data envelopment analysis to studies of irrigation efficiency in Andalusia. Journal of Irrigation and Drainage Engineering, 175–183
    [Google Scholar]
  6. Soil Survey Laboratory Staff
    Soil Survey Laboratory Staff [1992] Soil survey laboratory methods manual. Soil Survey Investigations Report n°42, Version 2.0. USDA-SCS U.S. Government Printing Office, Washington D.C.
    [Google Scholar]
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