Accounting for soil surface roughness in the inversion of ultrawideband off-ground GPR signal for soil moisture retrieval
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| Title: | Main Title: Accounting for soil surface roughness in the inversion of ultrawideband off-ground GPR signal for soil moisture retrieval |
| Description: | 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: | 10.1190/GEO2011-0054.1 (DOI) |
Responsible Party
| Creators: | Francois Jonard (Author), Lutz Weihermüller (Author), Harry Vereecken (Author), Sebastien Lambot (Author) |
| Publisher: | Society of Exploration Geophysicists |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | Z3 |
| Subjects: | Keywords: Surface, soil Roughness, Soil Moisture, GPR |
File Details
| Filename: | 2012_Jonard_Geophysics.pdf |
| Data Type: | Text - Article |
| Size: | 7 Pages |
| File Size: | 1.3 MB |
| Date: | Issued: 03.02.2012 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Geophysics |
| Issue: | 1 |
| Volume: | 77 |
| Number of Pages: | 7 (1 - 7) |
Metadata Details
| Metadata Creator: | Marius Schmidt |
| Metadata Created: | 03.12.2013 |
| Metadata Last Updated: | 03.12.2013 |
| Subproject: | Z3 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 935 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 3 |
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