Journal Article

PreJuSER-5533

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Remote Estimation of the Hydraulic Properties of a Sand Using Full-Waveform Integrated Hydrogeophysical Inversion of Time-Lapse, Off-Ground GPR Data

Lambot, S.FZJ* ; Slob, E. C. ; Rhebergen, J. ; Lopera, O. ; Jadoon, K. Z.FZJ* ; Vereecken, H.FZJ*

2009
SSSA Madison, Wis.

This record in other databases:  

Please use a persistent id in citations: doi:10.2136/vzj2008.0058

Abstract: 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.

Keyword(s): J

Note: 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.

---

Research Program(s):

1. Terrestrische Umwelt (P24)

Appears in the scientific report 2009

---