Examining the information content of time-lapse crosshole GPR data collected under different infiltration conditions to estimate unsaturated soil hydraulic properties

Scholer, Marie; Irving, James; Looms, Majken C.; Nielsen, Lars; Holliger, Klaus

doi:10.1016/j.advwatres.2012.12.011

Cited by 10 publications

(9 citation statements)

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“…For example, electrical resistivity surveys and HYDRUS modeling were used by Batlle‐Aguilar et al (2009) to investigate axisymmetrical infiltration patterns and by Lehmann et al (2013) to observe the evolution of soil wetting patterns preceding a hydrologically induced landslide. A large number of studies involved the complementary use of HYDRUS modeling and GPR data (e.g., Laloy et al, 2012; Jadoon et al, 2012; Scholer et al, 2013; Moghadas et al, 2013; Busch et al, 2013; Léger et al, 2014; Tran et al, 2014) or cosmic‐ray neutron probes (e.g., Franz et al, 2012; Bogena et al, 2013; Lv et al, 2014; Villarreyes et al, 2014). While the depth of penetration for GPR may be up to 10 to 15 m, its spatial extent is quite limited.…”

Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

746

336

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The HYDRUS-1D and HYDRUS (2D/3D) computer software packages are widely used finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. In 2008, Šimůnek et al. (2008b) described the entire history of the development of the various HYDRUS programs and related models and tools such as STANMOD, RETC, ROSETTA, UNSODA, UNSATCHEM, HP1, and others. The objective of this manuscript is to review selected capabilities of HYDRUS that have been implemented since 2008. Our review is not limited to listing additional processes that were implemented in the standard computational modules, but also describes many new standard and nonstandard specialized add-on modules that significantly expanded the capabilities of the two software packages. We also review additional capabilities that have been incorporated into the graphical user interface (GUI) that supports the use of HYDRUS (2D/3D). Another objective of this manuscript is to review selected applications of the HYDRUS models such as evaluation of various irrigation schemes, evaluation of the effects of plant water uptake on groundwater recharge, assessing the transport of particle-like substances in the subsurface, and using the models in conjunction with various geophysical methods.Abbreviations: CRS, cosmic-ray sensing; EC, electrical conductivity; ERT, electrical resistivity tomography; FEM, finite element mesh; GPR, ground-penetrating radar; GUI, graphical user interface; TDT, time-domain transmissometry.The HYDRUS-1D and HYDRUS (2D/3D) software packages (Šimůnek et al., 2008b) are finite-element models for simulating the one-and two-or three-dimensional movement of water, heat, and multiple solutes in variably saturated media, respectively. The standard versions, as well as various specialized add-on modules, of the HYDRUS programs numerically solve the Richards equation for saturated-unsaturated water flow and convection-dispersion type equations for heat and solute transport. The flow equation incorporates a sink term to account for water uptake by plant roots as a function of water and salinity stress. Both compensated and uncompensated water uptake by roots can be considered. The heat transport equation considers movement by both conduction and convection with flowing water. The governing convection-dispersion solute transport equations are written in a relatively general form by including provisions for nonlinear, nonequilibrium reactions between the solid and liquid phases and linear equilibrium reactions between the liquid and gaseous phases. The transport models also account for convection and dispersion in the liquid phase as well as diffusion in the gas phase, thus permitting the models to simulate solute transport simultaneously in both the liquid and gaseous phases. Hence, both adsorbed and volatile solutes, such as pesticides and fumigants, can be considered.The solute transport equations further incorporate the effects of zero-order production, first-o...

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Section: Selected Hydrus Applicationsmentioning

confidence: 99%

Recent Developments and Applications of the HYDRUS Computer Software Packages

Šimůnek

Genuchten

Šejna³

2016

Vadose Zone Journal

746

336

View full text Add to dashboard Cite

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“…In recent years, hydrogeophysical measurement methods, such as electrical resistivity tomography (ERT) and ground penetrating radar (GPR), are also widely used to collect information Kowalsky et al, 2005;Jadoon et al, 2012;Scholer et al, 2013). Furthermore, remote sensing is able to provide data for parameters estimation at larger scale (Vereecken et al, 2008;Montzka et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Impacts of different types of measurements on estimating unsaturated flow parameters

Shi

Song

Tong

et al. 2015

Journal of Hydrology

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“…Geophysical methods such as electrical resistivity tomography (ERT) and ground penetrating radar (GPR) show great potential in subsurface characterization [Parsekian et al, 2015]. For example, GPR was used for estimating subsurface porosity and solid dielectric permittivity [Mount and Comas, 2014] and subsurface hydraulic properties [Scholer et al, 2013]; ERT was used to research mixing waters between karst conduits and the matrix [Meyerhoff et al, 2014]. In addition to advances in techniques, much research has attempted to develop some indices that reflect the structure and function of CZs.…”

Section: Introductionmentioning

confidence: 99%

The global distribution of Earth's critical zone and its controlling factors

Liu

2017

Geophysical Research Letters

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The near‐surface layer of Earth which provides essential elements for supporting life is now recognized as the critical zone (CZ). This study provides the first global assessment of the CZ thickness (CZT) and its controlling factors by combining data sets of climate, vegetation height (VH), water table depth (WTD), groundwater thickness (GWT), topography, and lithologic data. The analysis shows that CZT ranges from 0.7 to 223.5 m with an average value of 36.8 m across continental areas; CZT is thickest in midlatitudes (subtropical to temperate zones). The proportion of aboveground part (VH) to CZT is 19.9 ± 16.7% (mean ±one standard deviation), while it is 80.1 ± 16.7% for the underground part (WTD + GWT). A generalized linear model shows that compound topographic index (ln(a/tan(b)), where a is the upslope contributing area and b is the slope degree of the landscape) and potential evapotranspiration are the first two major controlling factors on the variations in CZT. This study opens opportunities for further advancing CZ science by providing one of its most important properties—its thickness.

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Examining the information content of time-lapse crosshole GPR data collected under different infiltration conditions to estimate unsaturated soil hydraulic properties

Cited by 10 publications

References 48 publications

Recent Developments and Applications of the HYDRUS Computer Software Packages

Recent Developments and Applications of the HYDRUS Computer Software Packages

Impacts of different types of measurements on estimating unsaturated flow parameters

The global distribution of Earth's critical zone and its controlling factors

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