Anomaly Effects of Orthogonal Paired-arrays for 3D Geoelectrical Resistivity Imaging
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Springer-Verlag
Abstract
Description
A series of 2D apparent resistivity data were
generated over two synthetic models representing different
geological or environmental conditions commonly associated
with geophysical applications for hydrogeological,
environmental and engineering investigations. The apparent
resistivity data were generated for the following arrays:
Wenner-alpha (WA), Wenner-beta (WB), Wenner–
Schlumberger (WSC), dipole–dipole (DDP), pole–dipole
(PDP) and pole–pole (PP) arrays, which were paired such
that apparent resistivity data for 2D profiles in a parallel
direction are obtained with a particular array type and those
in a perpendicular direction are observed with a different
array type. The 2D apparent resistivity data for the
orthogonal paired-arrays were then collated to 3D data sets.
The effectiveness and efficiency of the orthogonal pairedarrays
in 3D geoelectrical resistivity imaging were evaluated
by determining the mean absolute anomaly effects of
the electrode configurations on the synthetic models. The
results show that DDP–PDP, DDP–PP, DDP–WSC, PDP–
PP, DDP–WB, PDP–WB and WB–WSC orthogonal
paired-arrays produced higher anomaly effects on the
synthetic models. This indicates that DDP–PDP, DDP–PP,
DDP–WSC, PDP–PP, DDP–WB, PDP–WB and WB–WSC
orthogonal paired-arrays are more sensitive to 3D features
of the geologic models than the other orthogonal pairedarrays
investigated
Keywords
QC Physics