Non-invasive probing of the near-surface soil moisture profile
dc.contributor.author | Woodhead, Ian M. | |
dc.contributor.author | Riding, P. | |
dc.contributor.author | Christie, John | |
dc.contributor.author | Buchan, Graeme D. | |
dc.date.accessioned | 2012-06-13T04:54:43Z | |
dc.date.issued | 2003-03 | |
dc.description.abstract | Time domain reflectometry imaging (TDRI) is a technique for non-invasive measurement of moisture content distribution. A solution to the 2-D problem has previously been described, and here we explain a configuration that provides a practical system for measuring a 1-D vertical profile of soil moisture. The measurement system consists of an enhanced TDR transmission line and reflectometer together with specialist software, to translate measurements of propagation times into a moisture content profile. We demonstrate a soil moisture accuracy of better than 2% for each 20 mm layer to 60 mm depth, with increasing accuracy loss for greater depths. However the attainable accuracy is dependent on the soil type and the dielectric model used for translation of permittivity profile to soil moisture profile. A practical depth limit for the current configuration is 100 mm. Assumptions and limitations of the technique will also be described. | en |
dc.description.sponsorship | New Zealand Foundation for Research Science and Technology | |
dc.identifier.citation | Woodhead, I. M., Riding, P., Christie, J. H., & Buchan, G. D. (2003). Non-Invasive Probing of the Near-Surface Soil Moisture Profile. Paper presented at the 5th International Conference on Electromagnetic Wave Interaction with Water and Moist Substances, Rotorua, New Zealand, March 24-26, 2003, pp. 254-261. | |
dc.identifier.uri | https://hdl.handle.net/10182/4531 | |
dc.language.iso | en | |
dc.publisher | International Society for Electromagnetic Aquametry (ISEMA) | |
dc.relation | The original publication is available from - International Society for Electromagnetic Aquametry (ISEMA) | en |
dc.rights | Copyright © International Society for Electromagnetic Aquametry (ISEMA) | |
dc.subject | moisture content | en |
dc.subject | soil | en |
dc.subject | Time Domain Reflectometry Imaging (TDRI) | en |
dc.subject | non-invasive measurement | en |
dc.subject | propagation times | en |
dc.subject | dielectric model | en |
dc.subject | moisture distribution | en |
dc.subject | permittivity | en |
dc.subject | profile | en |
dc.title | Non-invasive probing of the near-surface soil moisture profile | en |
dc.type | Conference Contribution - published | |
lu.contributor.unit | Lincoln University | |
lu.contributor.unit | Faculty of Agriculture and Life Sciences | |
lu.contributor.unit | Department of Soil and Physical Sciences | |
lu.subtype | Conference Paper | en |
pubs.notes | Paper presented at the 5th Conference of ISEMA 2003 on Electromagnetic Wave interaction with Water and Moist Substances, Rotorua, New Zealand, March 24-26, 2003 | en |
pubs.publication-status | Published | en |
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