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Proceedings Paper

Integration of ground-penetrating radar and downhole soil moisture data to map the thickness and continuity of landfill capping
Author(s): Tony S. Faulkner; Philip C. Mill; Kyle T. Moyle
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Paper Abstract

Ground-penetratinragd ar( GPR)a ndd ownholes oil moisturer eadinghs aveb eenc onductedo ver af ormer landfill to the north ofAdelaide, South Australia, in order to determine and map the thickness and lateral extents ofthe landfill capping layer over the underlying domestic waste. The study site, Cavan Landfill, is a former landfill undergoing a remediation program including landfill gas extraction and capping. Through the integration ofthe two data sets, GPR and soil-moisture, accurate information on the thickness and continuity of the capping layer on the landfill has been obtained. Six GPR profiles were collected using a Noggin 500 MHz unit. A time window of 50 nanoseconds was set to give maximum resolution between 0.8 metres and 2.4 metres. Ten shallow wells were installed for characterisation by the 'Diviner 2000' capacitance soil moisture probe along the periphery of the area. Moisture readings were collected in mmH2O over time at 10 centimetrei ntervalsu p to 1.6m etres in depth. Moisturep rofiles were superimposedo n the GPR profiles for interpretation. The results give accurate information on the capping layer, the degree of heterogeneity and moisture level fluctuations.

Paper Details

Date Published: 12 April 2002
PDF: 6 pages
Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); doi: 10.1117/12.462242
Show Author Affiliations
Tony S. Faulkner, Ecophyte Technologies (Australia)
Philip C. Mill, Ecophyte Technologies (Australia)
Kyle T. Moyle, Tonkin Consulting (Australia)

Published in SPIE Proceedings Vol. 4758:
Ninth International Conference on Ground Penetrating Radar
Steven Koppenjan; Hua Lee, Editor(s)

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