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Focus Topic: Hydrogeophysics

Hydrogeophysics is a cross-disciplinary area of research that uses geophysics to determine parameters and monitor processes for hydrological studies involving water resources, contamination, and ecological studies. This focus topic collects recent developments in hydrogeophysical methods for vadose zone research, such as electrical resistivity tomography, ground-penetrating radar, and electromagnetic induction. Applications of these methods are explored to characterize subsurface structures and derive hydraulic and biogeochemical parameters and states.
Peter F. Germann
Viscous flow theory expects sharp wetting shock fronts during infiltration in permeable media, but time domain reflectometry (TDR) measurements, using horizontally installed two-rod probes, reveal con...more
Benjamin Bass, M. Bayani Cardenas and Kevin M. Befus
This study investigated the spatial distribution and seasonal variation of soil moisture during a drought year throughout a first-order drainage basin whose hillslopes have different vegetation and so...more
Klaus Haaken, Alex Furman, Noam Weisbrod and Andreas Kemna
In this study, we investigated the ability of online geoelectrical monitoring to characterize water dynamics in the context of soil aquifer treatment (SAT). In spring 2014, we conducted several infilt...more
Ting-Kuei Chou, Michel Chouteau and Jean-Sébastien Dubé
Many hydrogeological and geophysical tools have been developed to determine subsoil properties, but they are often limited by sparse datasets and by the portability of the method from one site to anot...more
Sylvain Pasquet, Ludovic Bodet, Paolo Bergamo, Roger Guérin, Roland Martin, Régis Mourgues and Vincent Tournat
Physical properties of soils in the vadose zone, and especially their water content, are characterized by strong spatial and temporal variations mostly driven by weather and anthropogenic activities....more
Samuel Falzone and Kristina Keating
In this laboratory study, nuclear magnetic resonance (NMR) relaxation data were collected on unconsolidated sediment to determine the NMR response, characterized by the mean-log transverse relaxation...more
Yaning Liu, Gautam Bisht, Zachary M. Subin, William J. Riley and George Shu Heng Pau
We propose a hybrid reduced-order model that efficiently predicts fine-resolution responses to forcings by first training the model with solutions from a computationally intensive model. The method wa...more
Robert C. Schwartz, Steven R. Evett, Scott K. Anderson and David J. Anderson
Signal degradation in coaxial cables and interconnects is a long-standing problem in the practical deployment of time-domain reflectometry (TDR) for soil water monitoring. Acclima, Inc. has recently c...more
E.B. Haarder, K.H. Jensen, A. Binley, L. Nielsen, T.B. Uglebjerg and M.C. Looms
The movement of a saline tracer added to the soil surface was monitored in the unsaturated zone using cross-borehole electrical resistivity tomography (ERT) and subjected to natural rainfall condition...more
Magnus Persson, Torleif Dahlin and Thomas Günther
Laboratory experiments were carried out in a sand tank with saturated and unsaturated zones and a capillary fringe in between. Dye infiltration was monitored with image analysis and resistivity measur...more