SYMPOSIA PAPER Published: 01 January 1988
STP44851S

An Application of Impedance-Computed Tomography to Subsurface Imaging of Pollution Plumes

Source

An impedance-computed tomography (ICT) algorithm and system, known as the Electroscan system, for impedance imaging with surface measurements is described. The algorithm determines the current flow paths iteratively and employs sparse-matrix techniques. The measurement system uses a grid of electrodes over the ground surface and introduces controlled currents into a subset of electrodes in a prescribed sequence. Voltage measurements (using high-impedance equipment) are taken at passive electrodes only. Tests are reported for controlled saline plumes injected into a porous media flow field in a laboratory plume, and an uncontrolled leachate plume coming from a sanitary landfill located in floodplain alluvium.

Author Information

Tamburi, A
E. J. Faraci and Associates Ltd., Winnipeg, Manitoba, Canada
Roeper, U
Saskatchewan Water Corp., Regina, Saskatchewan, Canada
Wexler, A
University of Manitoba, Winnipeg, Manitoba, Canada
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Details
Developed by Committee: D18
Pages: 86–100
DOI: 10.1520/STP44851S
ISBN-EB: 978-0-8031-5037-9
ISBN-13: 978-0-8031-0968-1