Accession Number:

ADA413505

Title:

Measurements and Modeling of Soil Water Distribution Around Landmines in Natural Soil

Descriptive Note:

Corporate Author:

FYSISCH EN ELEKTRONISCH LAB TNO THE HAGUE (NETHERLANDS)

Report Date:

2001-01-01

Pagination or Media Count:

11.0

Abstract:

Soil water content, dielectric constant, electrical conductivity, thermal conductivity and heat capacity affect the performance of many sensors e.g. GPR, TIR 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 M3M3. The water content above and below the AT-mine increased from 0.09 to 0.17 M3M3 and 0.09 to 013 M3M3, respectively. Below the AT-mine it was 0.02 to 0.04 M3M3 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 Fm. After a period of 38 mm precipitation the contrast between AT-mine and background increased to 6 Fm. Differences in soil water distribution around the AT-mine caused a maximum dielectric contrast 4.5 Fm between background and mine. This effect was less apparent around the AP-mine 1.3 Fm. Differences in measured and simulated soil water distribution around an AT-mine urge for further investigation.

Subject Categories:

  • Geology, Geochemistry and Mineralogy
  • Civil Engineering
  • Land Mine Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE