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| Titel |
Quantitative high-resolution observations of soil water dynamics in a complicated architecture using time-lapse ground-penetrating radar |
| VerfasserIn |
P. Klenk, S. Jaumann, K. Roth |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 19, no. 3 ; Nr. 19, no. 3 (2015-03-02), S.1125-1139 |
| Datensatznummer |
250120642
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| Publikation (Nr.) |
 copernicus.org/hess-19-1125-2015.pdf |
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| Zusammenfassung |
| High-resolution time-lapse ground-penetrating radar (GPR) observations of
advancing and retreating water tables can yield a wealth of information about
near-surface water content dynamics. In this study, we present and analyze a
series of imbibition, drainage and infiltration experiments that have been
carried out at our artificial ASSESS test site and observed with
surface-based GPR. The test site features a complicated but known subsurface
architecture constructed with three different kinds of sand. It allows the
study of soil water dynamics with GPR under a wide range of different
conditions. Here, we assess in particular (i) the feasibility of monitoring
the dynamic shape of the capillary fringe reflection and (ii) the relative
precision of monitoring soil water dynamics averaged over the whole vertical
extent by evaluating the bottom reflection. The phenomenology of the GPR
response of a dynamically changing capillary fringe is developed from a soil
physical point of view. We then explain experimentally observed phenomena
based on numerical simulations of both the water content dynamics and the
expected GPR response. |
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