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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/hessd-12-12215-2015
© Author(s) 2015. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
20 Nov 2015
Review status
A revision of this discussion paper for further review has not been submitted.
Monitoring infiltration processes with high-resolution surface-based Ground-Penetrating Radar
P. Klenk, S. Jaumann, and K. Roth Institute of Environmental Physics, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
Abstract. In this study, we present a series of high resolution Ground-Penetrating Radar (GPR) measurements monitoring two artificially induced infiltration pulses into two different sands with dual-frequency ground-based GPR. After the application of the second infiltration pulse, the water table in the subsoil was raised by pumping in water from below. The longterm relaxation of the system was then monitored over the course of several weeks. We focused on the capillary fringe reflection and on observed variations in soil water content as derived from direct wave travel times. We discuss the advantages of this dual-frequency approach and show the attainable precision in longterm monitoring of such relaxation processes. Reaching a relative precision of better than 0.001 [–] in water content, we can clearly discern the relaxation of the two investigated sands.

Citation: Klenk, P., Jaumann, S., and Roth, K.: Monitoring infiltration processes with high-resolution surface-based Ground-Penetrating Radar, Hydrol. Earth Syst. Sci. Discuss., 12, 12215-12246, doi:10.5194/hessd-12-12215-2015, 2015.
P. Klenk et al.
Interactive discussionStatus: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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RC C5877: 'Review of Klenk et al. 2015', Anonymous Referee #1, 02 Jan 2016 Printer-friendly Version 
AC C6079: 'Brief author's reply to remarks made by anonymous referee #1', Patrick Klenk, 12 Jan 2016 Printer-friendly Version 
 
RC C6261: 'Review of Klenk 2015', Anonymous Referee #2, 22 Jan 2016 Printer-friendly Version 
P. Klenk et al.
P. Klenk et al.

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Short summary
The main goal of our work is to quantify near-surface soil water dynamics by advancing non-invasive measurement methods such as surface-based Ground-Penetrating Radar (GPR). Here, we observe soil infiltration processes with a novel dual-frequency GPR system. The high precision of our approach allows (i) closely investigating the dynamic evolution of specific subsurface signals in different materials and (ii) monitoring the longterm effect of infiltration pulses over the course of several months.
The main goal of our work is to quantify near-surface soil water dynamics by advancing...
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