TY  - JOUR
AU  - Lambot, S.
AU  - Slob, E. C.
AU  - Rhebergen, J.
AU  - Lopera, O.
AU  - Jadoon, K. Z.
AU  - Vereecken, H.
TI  - Remote Estimation of the Hydraulic Properties of a Sand Using Full-Waveform Integrated Hydrogeophysical Inversion of Time-Lapse, Off-Ground GPR Data
JO  - Vadose zone journal
VL  - 8
SN  - 1539-1663
CY  - Madison, Wis.
PB  - SSSA
M1  - PreJuSER-5533
SP  - 743 - 754
PY  - 2009
N1  - This research was supported by a Marie Curie Intra-European Fellowships within the 6th European Community Framework Program (SENSOIL project no. 502116), Delft University of Technology (TUDelft, The Netherlands), the TNO Defense, Security and Safety (The Netherlands), the Universite catholique de Louvain and Fonds National de la Recherche Scientifique (UCL and FNRS, Belgium), and the Forschungszentrum Julich (Germany). The authors are grateful to David Robinson and three anonymous reviewers for their constructive comments.
AB  - We used integrated hydrogeophysical inversion of time-lapse, proximal ground penetrating radar (GPR) data to remotely the unsaturated soil hydraulic properties of a laboratory sand during an infiltration event. The inversion procedure involved full-waveform modeling of the radar signal and one-dimensional, vertical flow modeling. We combined radar model with HYDRUS-1D. The radar system was set up using standard, handheld vector network analyzer Significant effects of water dynamics were observed on the time-lapse radar data. The estimated hydraulic were relatively consistent with direct characterization of undisturbed sand samples. Significant differences particularly observed for the saturated hydraulic conductivity, which was underestimated by two orders of magnitude. Nevertheless, the use of soil hydraulic parameters derived from reference measurements failed to correctly water dynamics, whereas GPR-based predictions captured some of the major features of time domain reflectometry measurements and better agreed with visual observations. These results suggest that the proposed method promising for noninvasive, effective hydraulic characterization of the shallow subsurface and hence, monitoring of dynamics at the field scale.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000268871900021
DO  - DOI:10.2136/vzj2008.0058
UR  - https://juser.fz-juelich.de/record/5533
ER  -