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Brooks-Corey and van Genuchten Soil-Water-Retention Models
Journal of Irrigation and Drainage Engineering, 1995In 1989 Lenhard et al. discussed a method for converting van Genuchten's 1980 soil-water-retention model into a simpler power-law model of the form proposed by Brooks and Corey in 1964. In this paper, the effect of this conversion on the numerical modeling of infiltration in a variety of soil types is investigated.
Stankovich, J. M., Lockington, D. A.
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On the Correspondence between Brooks‐Corey and van Genuchten Models
Journal of Irrigation and Drainage Engineering, 1989A procedure is described for converting van Genuchten (VG) saturation (\IS\N) - capillary pressure (\IP\N) - permeability (\Ik\N) model parameters to equivalent Brooks-Corey (BC) parameters or vice-versa. Differential fluid saturation capacities of the VG and BC \IS-P\N relations are equated at an effective wetting fluid saturation of 0.5 to relate the
R. J. Lenhard, J. C. Parker, S. Mishra
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On the Improvement of Hydraulic Conductivity Function in Van Genuchten-Mualem Model
Applied Mechanics and Materials, 2014Hydraulic conductivity (HC) is deduced indirectly from soil water retention curves (SWRC) by Mualem model, but the mathematical calculation in the Mualem model is sensitive to integration interval near saturation. After the van Genuchten model fit actual SWRC, the van Genuchten-Mualem (VGM) HC is integrated simply by an analytical function for ...
Yeong Mog Park +3 more
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Waste Management, 2015
Numerical models of landfill processes need to be able to estimate the capillary pressure and relative permeability of waste as a function of moisture content using analytical equations such as the van Genuchten equations. The paper identifies the range of van Genuchten parameter values for use in models and proposes a formulaic relationship between ...
Jim, White +3 more
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Numerical models of landfill processes need to be able to estimate the capillary pressure and relative permeability of waste as a function of moisture content using analytical equations such as the van Genuchten equations. The paper identifies the range of van Genuchten parameter values for use in models and proposes a formulaic relationship between ...
Jim, White +3 more
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Correspondence between the Campbell and van Genuchten Soil-Water-Retention Models
Journal of Irrigation and Drainage Engineering, 2010Two methods are presented that allow converting the van Genuchten (VG) soil-water-retention (SWR) model parameters to equivalent parameters of the Campbell (C) model. The first method builds on an available solution to convert the VG model to an equivalent Brooks-Corey (BC) model, but accounts for the fact that the effective water content of the BC ...
Rolf Sommer, Claudio Stöckle
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Improved Prediction of Unsaturated Hydraulic Conductivity with the Mualem‐van Genuchten Model
Soil Science Society of America Journal, 2000In many vadose zone hydrological studies, it is imperative that the soil's unsaturated hydraulic conductivity is known. Frequently, the Mualem–van Genuchten model (MVG) is used for this purpose because it allows prediction of unsaturated hydraulic conductivity from water retention parameters.
Marcel G. Schaap, Feike J. Leij
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Estimating van Genuchten Model Parameters of Undisturbed Soils Using an Integral Method
Pedosphere, 2010Abstract The van Genuchten model is the most widely used soil water retention curve (SWRC) model. Two undisturbed soils (clay and loam) were used to evaluate the accuracy of the integral method to estimate van Genuchten model parameters and to determine SWRCs of undisturbed soils.
Xiang-Wei HAN, Ming-An SHAO, R. HORTON
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Effects of Constraints on van Genuchten Parameters for Modeling Soil-Water Characteristic Curves
Journal of Geotechnical and Geoenvironmental Engineering, 2014AbstractWater-retention data for a suite of predominantly sandy soils were analyzed to quantify the effects of two constraints commonly applied to the three-parameter model for the soil-water characteristic curve (SWCC). Systematic effects were observed.
William J. Likos, Jun Yao
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European Journal of Soil Science, 2020
Abstract Modelling of flow and transport in unsaturated soils requires information on two fundamental hydraulic properties: the soil water retention curve and relative hydraulic conductivity.
Xingxing Kuang +3 more
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Abstract Modelling of flow and transport in unsaturated soils requires information on two fundamental hydraulic properties: the soil water retention curve and relative hydraulic conductivity.
Xingxing Kuang +3 more
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Estimation of water retention curve from mercury intrusion porosimetry and van Genuchten model
ACI Structural Journal, 2006The water retention curve (WRC) is a hydraulic characteristic of concrete required for advanced modeling of water (and thus solute) transport in variably saturated, heterogeneous concrete. Unfortunately, determination by a direct experimental method (for example, measuring equilibrium moisture levels of large samples stored in constant humidity cells ...
Leech, C, Lockington, D, Hooton, RD
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