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Proceedings Paper

Dielectric properties of contaminated soil
Author(s): Yi Huang; Michael T.C. Fang; Van Thuan Nguyen; Asger Eriksen
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Paper Abstract

There are many anomalies associated with the application of ground penetrating radar (GPR) for the detection of hydrocarbon contamination. The aim of this paper is to investigate this problem by measuring the complex permittivity (i.e., the permittivity and conductivity) of contaminated soils over the GPR frequencies 100 - 1000 MHz. A coaxial cell, which is much larger than commercially available cells, is designed and calibrated to measure soil samples. The new system which is based on transmission line principle uses only one port and the far end of the cell is short-circuited by a metal plate, thus it is easy to load and hold the sample. Only the reflection coefficient is needed for data interpretation. In addition, there is no dielectric support for the inner conductor of the coaxial cell, therefore this system can offer good measurement accuracy. Measurements have been conducted on four samples obtained from two hydrocarbon contaminated sites with various degree of contamination. It is observed that the conductivity of the soil is associated with the contamination: the heavier the contamination, the higher the conductivity. This seems to agree well with on site measurement using EM conductivity and 2D resistivity imaging approaches.

Paper Details

Date Published: 15 October 1999
PDF: 7 pages
Proc. SPIE 3752, Subsurface Sensors and Applications, (15 October 1999); doi: 10.1117/12.365694
Show Author Affiliations
Yi Huang, Univ. of Liverpool (United Kingdom)
Michael T.C. Fang, Univ. of Liverpool (United Kingdom)
Van Thuan Nguyen, Shell Research Ltd. (United Kingdom)
Asger Eriksen, Geo-Service International, Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 3752:
Subsurface Sensors and Applications
Cam Nguyen, Editor(s)

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