[731] - Accounting for soil surface roughness in the inversion of ultrawideband off-ground GPR signal for soil moisture retrieval

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Jonard, F., Weihermüller, L., Vereecken, H., Lambot, S., 2012. Accounting for soil surface roughness in the inversion of ultrawideband off-ground GPR signal for soil moisture retrieval. Geophysics, 77 (1), 1 - 7. DOI: 10.1190/GEO2011-0054.1.
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Title(s):Main Title: Accounting for soil surface roughness in the inversion of ultrawideband off-ground GPR signal for soil moisture retrieval
Description(s):Abstract: We combined a full-waveform ground-penetrating radar (GPR) model with a roughness model to retrieve surface soil moisture through signal inversion. The proposed approach was validated under laboratory conditions with measurements performed above a sand layer subjected to seven different water contents and four different surface roughness conditions. The radar measurements were performed in the frequency domain in the range of 1–3 GHz and the roughness amplitude standard deviation was varied from 0 to 1 cm. Two inversion strategies were investigated: (1) Full-waveform inversion using the correct model configuration, and (2) inversion focused on the surface reflection only. The roughness model provided a good description of the frequency-dependent roughness effect. For the fullwaveform analysis, accounting for roughness permitted us to simultaneously retrieve water content and roughness amplitude. However, in this approach, information on soil layering was assumed to be known. For the surface reflection analysis, which is applicable under field conditions, accounting for roughness only enabled water content to be reconstructed, but with a root mean square error (RMS) in terms of water content of 0.034 m3 m−3 compared to an RMS of 0.068 m3 m−3 for an analysis where roughness is neglected. However, this inversion strategy required a priori information on soil surface roughness, estimated, e.g., from laser profiler measurements.
Identifier(s):DOI: 10.1190/GEO2011-0054.1
Responsible Party
Creator(s):Author: Francois Jonard
Author: Lutz Weihermüller
Author: Harry Vereecken
Author: Sebastien Lambot
Publisher:Society of Exploration Geophysicists
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Surface, soil Roughness, Soil Moisture, GPR
File Details
File Name:2012_Jonard_Geophysics.pdf
Data Type:Text
Size(s):7 Pages
File Size:1302 kB (1.271 MB)
Date(s):Issued: 2012-02-03
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
North:-no map data
Measurement Region:Laboratory
Measurement Location:--Laboratory--
Specific Informations - Publication
Article Type:Journal
Number Of Pages:7
Page Range:1 - 7
Metadata Details
Metadata Creator:Marius Schmidt
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-03
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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