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    Seismoelectric imaging of the vadose zone of a sand aquifer

    20733_downloaded_stream_189.pdf (5.489Mb)
    Access Status
    Open access
    Authors
    Dupuis, J.
    Butler, K.
    Kepic, Anton
    Date
    2007
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Dupuis, J.Christian and Butler, Karl E. and Kepic, Anton W.. 2007. Seismoelectric imaging of the vadose zone of a sand aquifer. Geophysics 72 (6): 81-85.
    Source Title
    Geophysics
    DOI
    10.1190/1.2773780
    Faculty
    Department of Exploration Geophysics
    Division of Resources and Environment
    Remarks

    Published by the Society of Exploration Geophysicists.

    2007 Society of Exploration Geophysicists.

    Dupuis, J.Christian and Butler, Karl E. and Kepic, Anton W. (2007) Seismoelectric imaging of the vadose zone of a sand aquifer, Geophysics 72(6):81-85.

    URI
    http://hdl.handle.net/20.500.11937/16694
    Collection
    • Curtin Research Publications
    Abstract

    We have acquired a 300-m seismoelectric section over an unconfined aquifer to demonstrate the effectiveness of interfacial signals at imaging interfaces in shallow sedimentary environments. The seismoelectric data were acquired by using a 40-kg accelerated weight-drop source and a 24-channel seismoelectric recording system composed of grounded dipoles, preamplifiers, and seismographs. In the shot records, interfacial signals were remarkably clear; they arrived simultaneously at offsets as far as 40 m from the seismic source. The most prominent signal was generated at the water table at a depth of approximately 14 m and had peak amplitudes on the order of 1 V/m. A weaker response was generated at a shallower interface that is interpreted to be a water-retentive layer. The validity of these two laterally continuous events, and of other discontinuous events indicative of vadose-zone heterogeneity, is corroborated by the presence of reflections exhibiting similar characteristics in a ground-penetrating radar profile acquired along the same line.

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