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Proceedings Paper

Measurements and modeling of soil water distribution around landmines in natural soil
Author(s): Henk A. Lensen; Piet B. W. Schwering; Garciela Rodriguez Marin; Jan M. H. Hendrickx
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Paper Abstract

Soil water content, dielectric constant, electrical conductivity, thermal conductivity and heat capacity affect the performance of many sensors and therefore the detection of landmines. The most important of these is water content since it directly influences the other properties. We measure soil water distribution around an antitank and an antipersonnel mine buried in a sand soil under varying moisture levels. After a period of two days with 38 mm precipitation the water content below the AP-mine increased from 0.07 to 0.12. The water content above and below the AT- mine increased from 0.09 to 0.17 and 0.09 to 0.13, respectively. Below the AT-mine it was 0.02 to 0.04 dryer than above the mine. The dielectric constant of the soil was estimated from the soil water content. After a dry period of two weeks the dielectric contrast between the AT-mine was approximately 2 (F/m). After a period of 38 mm precipitation the contrast between AT-mine and background increased to 6 (F/m). Differences in soil water distribution around the AT- mine caused a maximum dielectric contrast 4.5 (F/m) between background and mine. This effect was less apparent around the AP-mine. Differences in measured and simulated soil water distribution around an AT-mine urge for further investigation.

Paper Details

Date Published: 18 October 2001
PDF: 11 pages
Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); doi: 10.1117/12.445494
Show Author Affiliations
Henk A. Lensen, TNO (Netherlands)
Piet B. W. Schwering, TNO (Netherlands)
Garciela Rodriguez Marin, New Mexico Institute of Mining and Technology (United States)
Jan M. H. Hendrickx, New Mexico Institute of Mining and Technology (United States)

Published in SPIE Proceedings Vol. 4394:
Detection and Remediation Technologies for Mines and Minelike Targets VI
Abinash C. Dubey; James F. Harvey; J. Thomas Broach; Vivian George, Editor(s)

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