Evaporative flux from a shallow watertable: The influence of a vapour–liquid phase transition

Gowing, J.W.; Konukcu, Fatih; Rose, D. A.

doi:10.1016/j.jhydrol.2005.07.035

Cited by 93 publications

(74 citation statements)

References 17 publications

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“…Steady-state water flow from the WT to the soil surface was extensively studied theoretically and experimentally for homogeneous soils (Moore, 1939;Anat, 1965;Warrick, 1988;Gowing et al, 2006;Salvucci, 1993;Shokri and Salvucci, 2011;Sadeghi et al, 2012a) as well as for stratified soil profiles (Willis, 1960;Ripple et al, 1970;Warrick and Yeh, 1990;Lu and Zhang, 2004) and other heterogeneous media Zhu and Mohanty, 2002;Bechtold et al, 2012). The majority of developed models are based on the Buckingham-Darcy law (Buckingham, 1907) and its analytical or numerical solutions within the liquid flow domain.…”

Section: Introductionmentioning

confidence: 99%

Column-scale unsaturated hydraulic conductivity estimates in coarse-textured homogeneous and layered soils derived under steady-state evaporation from a water table

Sadeghi

Tuller

Gohardoust

et al. 2014

Journal of Hydrology

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Effective hydraulic properties s u m m a r y Steady-state evaporation from a water table has been extensively studied for both homogeneous and layered porous media. For layered media it is of interest to find an equivalent homogeneous medium and define ''effective'' hydraulic properties. In this paper a new solution for steady-state evaporation from coarse-textured porous media is presented. Based on this solution, the evaporation rate represents a macroscopic (column-scale) measure of unsaturated hydraulic conductivity at the pressure head equal to the maximum extent of the hydraulically connected region above the water table. The presented approach offers an alternative method for determination of unsaturated hydraulic conductivity of homogeneous coarse-textured soils and a new solution for prediction of the effective unsaturated hydraulic conductivity of layered coarse-textured soils. The solution was evaluated with both experimental data and numerical simulations. Comparison with experimental data and numerical results for hypothetically layered soil profiles demonstrate the applicability of the proposed approach for coarse-textured soils.

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Section: Introductionmentioning

confidence: 99%

Column-scale unsaturated hydraulic conductivity estimates in coarse-textured homogeneous and layered soils derived under steady-state evaporation from a water table

Sadeghi

Tuller

Gohardoust

et al. 2014

Journal of Hydrology

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“…The assumption of constant ν a will break down in circumstances where the evaporative flux is high and a humid boundary layer forms above the soil surface, as can frequently be seen, for example, immediately after heavy rain on a hot day; we will comment below on the regimes in which this may occur. For simplicity we follow other studies (Gowing et al 2006;Pieters & van Duijn 2006) by considering the soil to be isothermal, with the same constant system temperature T 0 as the ground surface. This assumption requires some discussion.…”

Section: Problem Formulationmentioning

confidence: 99%

Instability of the salinity profile during the evaporation of saline groundwater

Ильичев¹,

Tsypkin²,

Pritchard³

et al. 2008

J. Fluid Mech.

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We investigate salt transport during the evaporation and upflow of saline groundwater. We describe a model in which a sharp evaporation-precipitation front separates regions of soil saturated with an air-vapour mixture and with saline water. We then consider two idealised problems. We first investigate equilibrium configurations of the fresh-water system when the depth of the soil layer is finite, obtaining results for the location of the front and for the upflow of water induced by the evaporation. Motivated by these results, we develop a solution for a propagating front in a soil layer of infinite depth, and we investigate the gravitational stability of the salinity profile which develops below the front, obtaining marginal linear stability conditions in terms of a Rayleigh number and a dimensionless salt saturation parameter. Applying our findings to realistic parameter regimes, we predict that salt fingering is unlikely to occur in low-permeability soils, but is likely in high-permeability (sandy) soils under conditions of relatively low evaporative upflow.

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“…The results from Gowing et al [13] showed that the vaporization plane usually resided 4-14 cm below the ground surface for saline or non-saline soils. Assouline et al [17] pointed out that the thickness of the dry layer above the vaporization plane varied within a relatively narrow range from 3 to 20 mm.…”

Section: Introductionmentioning

confidence: 99%

“…In this case, the evaporative process is composed of an upward capillary liquid flow from the water table to the evaporative front (or vaporization plane) and a vapour diffusion through the upper dry layer. Many studies have been devoted to this subject, such as Rose et al [12], Gowing et al [13], Il'ichev et al [14], Lehmann et al [15], Shokri et al [16], and Shokri and Salvucci [11].…”

Section: Introductionmentioning

confidence: 99%

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Calculation of Steady-State Evaporation for an Arbitrary Matric Potential at Bare Ground Surface

Liu

Zhan

2017

Water

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Abstract:Evaporation from soil columns in the presence of a water table is a long lasting subject that has received great attention for many decades. Available analytical studies on the subject often involve an assumption that the potential evaporation rate is much less than the saturated hydraulic conductivity of the soil. In this study, we develop a new semi-analytical method to estimate the evaporation rate for an arbitrary matric potential head at bare soil surface without assuming that the potential evaporation rate is much less than the saturated hydraulic conductivity of the soil. The results show that the evaporation rates calculated by the new solutions fit well with the HYDRUS-1D simulation. The new solutions also can reproduce the results of potential evaporation rate calculated from previous equations under the special condition of an infinite matric potential head at bare soil surface. The developed new solutions expand our present knowledge of evaporation estimation at bare ground surface to more general field conditions.

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Evaporative flux from a shallow watertable: The influence of a vapour–liquid phase transition

Cited by 93 publications

References 17 publications

Column-scale unsaturated hydraulic conductivity estimates in coarse-textured homogeneous and layered soils derived under steady-state evaporation from a water table

Column-scale unsaturated hydraulic conductivity estimates in coarse-textured homogeneous and layered soils derived under steady-state evaporation from a water table

Instability of the salinity profile during the evaporation of saline groundwater

Calculation of Steady-State Evaporation for an Arbitrary Matric Potential at Bare Ground Surface

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