Preprints
https://doi.org/10.5194/tc-2017-77
https://doi.org/10.5194/tc-2017-77
06 Jun 2017
 | 06 Jun 2017
Status: this preprint was under review for the journal TC but the revision was not accepted.

Brief communication: Estimation of hydraulic properties of active layers using ground-penetrating radar (GPR) and 2D inverse hydrological modeling

Xicai Pan, Stefan Jaumann, Jiabao Zhang, and Kurt Roth

Abstract. Estimation of hydraulic properties of active layers is challenging due to the freeze-thaw effect in space and time. Provided an active layer with an undulating thawing table, monitoring of spatial soil water dynamics could provide significant information for commonly-used inverse estimation of soil hydraulic properties. In this study, we assess the feasibility of efficiently estimating soil hydraulic properties using Ground-Penetrating Radar (GPR) observations – soil water storage and layer thickness in conjunction with a two-dimensional hydrological model. The results of this study conceptually demonstrate that spatial and temporal observations of soil moisture in the active layer during a rain event are sufficient for inverse estimation of soil hydraulic parameters. The proposed method depends on the lateral water redistribution controlled by the undulating frost table and/or the intensity and duration of the precipitation. We suggest that this method could be used for seasonal-scale estimation of soil hydraulic properties.

Xicai Pan, Stefan Jaumann, Jiabao Zhang, and Kurt Roth
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Xicai Pan, Stefan Jaumann, Jiabao Zhang, and Kurt Roth
Xicai Pan, Stefan Jaumann, Jiabao Zhang, and Kurt Roth

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Short summary
This study proposes a new method for estimating hydraulic properties of active layers using ground-penetrating radar (GPR) and 2D inverse hydrological modeling. This method creatively turns over the adverse features of undulating frost table for 1D inverse estimation of hydraulic parameters to assets for 2D inverse estimation. Its advantages include non-destructive observations, a bigger scale of the soil hydraulic properties and efficiency for permafrost studies.