In:
GEOPHYSICS, Society of Exploration Geophysicists, Vol. 73, No. 4 ( 2008-07), p. J15-J23
Kurzfassung:
Ground-penetrating radar is a fast noninvasive technique that can monitor subsurface structure and water-content distribution. To interpret traveltime information from single common-offset measurements, additional assumptions, such as constant permittivity, usually are required. We present a fast ground-penetrating-radar measurement technique using a multiple transmitter-and-receiver setup to measure simultaneously the reflector depth and average soil-water content. It can be considered a moving minicommon-midpoint measurement. For a simple analysis, we use a straightforward evaluation procedure that includes two traveltimes to the same reflector, obtained from different antenna separations. For a more accurate approach, an inverse evaluation procedure is added, using traveltimes obtained from all antenna separations at one position and its neighboring measurement locations. The evaluation of a synthetic data set with a lateral variability in reflector depth and an experimental example with a large variability in soil-water content are introduced to demonstrate the applicability for field-scale measurements. The crucial point for this application is the access to absolute traveltimes, which are difficult to determine accurately from common-offset measurements.
Materialart:
Online-Ressource
ISSN:
0016-8033
,
1942-2156
Sprache:
Englisch
Verlag:
Society of Exploration Geophysicists
Publikationsdatum:
2008
ZDB Id:
2033021-2
ZDB Id:
2184-2
SSG:
16,13
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