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Interpretation pitfalls to avoid in void interpretation from ground-penetrating radar imaging

David C. Nobes
Interpretation pitfalls to avoid in void interpretation from ground-penetrating radar imaging
Interpretation (Tulsa) (November 2018) 6 (4): SL21-SL28

Abstract

Voids are features that occur commonly in near-surface geophysical imaging. They are usually readily identified in ground penetrating radar (GPR) imaging because of the strong reflection amplitudes, akin to the "bright spot" in oil and gas exploration. However, voids are often misidentified. Some voids are missed, and other anomalous features are misinterpreted as voids, when in fact they are not. We evaluate some examples of features will be presented from glacial imaging and engineering geophysics that were misinterpreted as voids, compare them with real voids, and we determine the differences that separate them. Another example from archaeology was identified as a void based on incomplete data, and was only coincidentally coincident with a void. In particular, in addition to strong top and bottom reflections, voids may have multiple reflections but will not have internal reflections. Voids will also tend to be limited in extent, and won't, in general, underlie an entire GPR profile.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 6
Serial Issue: 4
Title: Interpretation pitfalls to avoid in void interpretation from ground-penetrating radar imaging
Author(s): Nobes, David C.
Affiliation: East China University of Technology, School of Geophysics and Measurement-Control Technology, Nanchang, China
Pages: SL21-SL28
Published: 201811
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 33
Accession Number: 2019-007364
Categories: Applied geophysicsEngineering geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Special section; Interpretation pitfalls
Illustration Description: illus. incl. sects., 3 tables
N45°45'00" - N46°04'60", E06°49'60" - E07°04'60"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201907
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