Dielectric properties of contaminated soil

Yi Huang; Michael T.C. Fang; Van Thuan Nguyen; Asger Eriksen

doi:10.1117/12.365694

15 October 1999 Dielectric properties of contaminated soil

Yi Huang, Michael T.C. Fang, Van Thuan Nguyen, Asger Eriksen

Proceedings Volume 3752, Subsurface Sensors and Applications; (1999) https://doi.org/10.1117/12.365694
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

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.

Citation Download Citation

Yi Huang, Michael T.C. Fang, Van Thuan Nguyen, and Asger Eriksen "Dielectric properties of contaminated soil", Proc. SPIE 3752, Subsurface Sensors and Applications, (15 October 1999); https://doi.org/10.1117/12.365694

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