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| Titel |
Estimating field-scale soil water dynamics at a heterogeneous site using multi-channel GPR |
| VerfasserIn |
X. Pan, J. Zhang, P. Huang, 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 ; 16, no. 11 ; Nr. 16, no. 11 (2012-11-23), S.4361-4372 |
| Datensatznummer |
250013579
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| Publikation (Nr.) |
 copernicus.org/hess-16-4361-2012.pdf |
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| Zusammenfassung |
| We explore the feasibility to quantify the field-scale soil water dynamics
through time series of GPR (ground-penetrating radar) measurements, which
bridge the gap between point measurements and field measurements. Working on
a 40 m × 50 m area in a heterogeneous agricultural field, we
obtain a time series of radargrams after a heavy rainfall event. The data are
analysed to simultaneously yield (i) a three-dimensional representation of
the subsurface architecture and (ii) the total soil water volume between the
surface and a reflection boundary associated with the presence of paleo sand
dunes or clay inclusions in a rather uniform sand matrix. We assess the
precision and the accuracy of these quantities and conclude that the method
is sensitive enough to capture the spatial structure of the changing soil
water content in a three-dimensional heterogeneous soil during a
short-duration infiltration event. While the sensitivity of the method needs
to be improved, it already produced useful information to understand the
observed patterns in crop height and it yielded insight into the dynamics of
soil water content at this site including the effect of evaporation. |
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