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We applied spatial predictions of physical soil properties to a pedotransfer function to predict hydraulic properties at high resolution in a semiarid landscape. Estimated soil properties explained patterns of vegetation dynamics.

Vadose Zone Journal September 01, 2015, Vol.14, vzj2014.09.0126. doi:https://doi.org/10.2136/vzj2014.09.0126

We analyze the effects of bimodal hydraulic properties on the shear strength assessments through the proposal of a new closed-form equation obtained integrating a bimodal lognormal retention model into the suction stress framework.

Vadose Zone Journal September 01, 2015, Vol.14, vzj2014.10.0152. doi:https://doi.org/10.2136/vzj2014.10.0152

The problem of steady air injection into partially saturated, laterally confined soil domains, bounded by either an upper atmospheric pressure soil surface or by a lower impermeable phreatic surface is analyzed with the help of analytical solutions to the linearized air flow equation. This analysis, although not accounting for unstable, non-Darcian air flow, can be applied for designing subsurface aeration systems.

Vadose Zone Journal September 01, 2015, Vol.14, vzj2014.12.0170. doi:https://doi.org/10.2136/vzj2014.12.0170

Experiments were carried out to measure water retention curves (WRCs) of an unsaturated soil using different suction control techniques. The WRCs obtained from this study together with existing published data were then compared and analyzed using newly derived thermodynamic equations for moisture exchange in soils.

Vadose Zone Journal September 01, 2015, Vol.14, vzj2015.01.0006. doi:https://doi.org/10.2136/vzj2015.01.0006
Vadose Zone Journal September 01, 2015, Vol.14, vzj2015.01.0014. doi:https://doi.org/10.2136/vzj2015.01.0014

Soil fissures and small cracks develop as a result of matrix shrinkage; upon wetting, the soil matrix volume increases by swelling, thereby partially closing the cracks and fissures. We propose a model for flow and transport accounting for the geometrical deformation of both the soil matrix and the fracture porous systems, as well as for the dynamics of hydraulic properties in response to the domain deformations.

Vadose Zone Journal September 01, 2015, Vol.14, vzj2015.02.0021. doi:https://doi.org/10.2136/vzj2015.02.0021
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