Seismoelectric imaging of the vadose zone of a sand aquifer
|dc.identifier.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.|
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.
|dc.publisher||Society of Exploration Geophysics|
|dc.title||Seismoelectric imaging of the vadose zone of a sand aquifer|
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.
|curtin.faculty||Department of Exploration Geophysics|
|curtin.faculty||Division of Resources and Environment|