Using pedotransfer functions to estimate the van genuchten- mualem soil hydraulic properties: A review

Vadose Zone Journal

Volumn 9, Issue 4, 2010, Pages 795-820

  Vereecken, H ^a   Javaux, M ^a,b   Weynants, M ^b   Pachepsky, Y ^c   Schaap, M G ^d   Genuchten, Van ^e  

^a FORSCHUNGSZENTRUM JÜLICH   (Germany)

^b UNIVERSITÉ CATHOLIQUE DE LOUVAIN   (Belgium)

^c AGRICULTURAL RESEARCH SERVICE   (United States)

^d UNIVERSITY OF ARIZONA   (United States)

^e FEDERAL UNIVERSITY OF RIO DE JANEIRO   (Brazil)

Author keywords

[No Author keywords available]

Indexed keywords

BIOGEOCHEMISTRY; BIOLOGICAL MATERIALS; FORECASTING; HYDRAULIC CONDUCTIVITY; ORGANIC COMPOUNDS; SOIL MOISTURE; STRUCTURAL PROPERTIES; WATER CONTENT;

MEASUREMENT PROCEDURES; PEDOTRANSFER FUNCTIONS; SOIL HYDRAULIC FUNCTIONS; SOIL HYDRAULIC PROPERTIES; SOIL ORGANIC MATTERS; TEXTURAL PROPERTIES; UNSATURATED HYDRAULIC CONDUCTIVITY; VAN GENUCHTEN MODEL;

PARAMETERIZATION;

BULK DENSITY; DATA SET; DATABASE; ESTIMATION METHOD; HYDRAULIC CONDUCTIVITY; HYDRAULIC PROPERTY; LITERATURE REVIEW; MOISTURE CONTENT; NUMERICAL MODEL; PEDOTRANSFER FUNCTION; SOIL MOISTURE; SOIL ORGANIC MATTER; SOIL TEXTURE; SOIL TYPE; STANDARDIZATION; TIME DEPENDENT BEHAVIOR; WATER CONTENT;

EID: 79952021642     PISSN: None     EISSN: 15391663     Source Type: Journal    
DOI: 10.2136/vzj2010.0045     Document Type: Article

References (135)

1. Al Majou, H., A. Bruand, and O. Duval. 2008a. The use of in situ volumetric water content at field capacity to improve the prediction of soil water retention properties. Can. J. Soil Sci. 88:533-541.
2. Al Majou, H., A. Bruand, O. Duval, C. Le Bas, and A. Vautier. 2008b. Prediction of soil water retention properties after stratification by combining texture, bulk density and the type of horizon. Soil Use Manage. 24:383-391.
3. Baumer, O.W. 1992. Predicting unsaturated hydraulic parameters. p. 341-355. In M.Th. van Genuchten et al. (ed.) Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
4. Boels, D., J. Van Gils, G.J. Veerman, and K.E. Wit. 1978. Theory and system of automatic determination of soil moisture characteristics and unsaturated hydraulic conductivities. Soil Sci. 126:191-199.
5. Børgesen, C.D., B.V. Iversen, O.H. Jacobsen, and M.G. Schaap. 2008. Pedotransfer functions estimating soil hydraulic properties using different soil parameters. Hydrol. Processes 22:1630-1639.
6. Børgesen, C.D., O.H. Jacobsen, S. Hansen, and M.G. Schaap. 2006. Soil hydraulic properties near saturation, an improved conductivity model. J. Hydrol. 324:40-50.
7. Børgesen, C.D., and M.G. Schaap. 2005. Point and parameter pedotransfer functions for water retention predictions for Danish soils. Geoderma 127:154-167.
8. Bouma, J. 1983. Use of soil survey data to select measurement techniques for hydraulic conductivity. Agric. Water Manage. 6:177-190.
9. Brutsaert, W. 1966. Probability laws for pore size distributions. Soil Sci. 101:85-92.
10. Burdine, N.T. 1953. Relative permeability calculations from pore size distribution data. Trans. Am. Inst. Min. Metall. Eng. 198:71-78.
11. Campbell, G.S., and S. Shiozawa. 1992. Prediction of hydraulic properties of soils using particle size distribution and bulk density. p. 317-328. In M.Th. van Genuchten et al. (ed.) Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
12. Childs, E.C., and N. Collis-George. 1950. The permeability of porous materials. Proc. R. Soc. London A 201:392-405.
13. Chirico, G.B., H. Medina, and N. Romano. 2010. Functional evaluation of PTF prediction uncertainty: An application at hillslope scale. Geoderma 155:193-202.
14. Christiaens, K., and J. Feyen. 2001. Analysis of uncertainties associated with different methods to determine soil hydraulic properties and their propagation in the distributed hydrological MIKE SHE model. J. Hydrol. 246:63-81.
15. Corey, A.T. 1992. Pore size distribution. p. 37-44. In M.Th. van Genuchten et al. (ed.) Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
16. Cornelis, W.M., M. Khlosi, R. Hartmann, M. Van Meirvenne, and B. De Vos. 2005. Comparison of unimodal analytical expressions for the soil-water retention curve. Soil Sci. Soc. Am. J. 69:1902-1911.
17. Cornelis, W.M., J. Ronsyn, M. Van Meirvenne, and R. Hartmann. 2001. Evaluation of pedotransfer functions for predicting the soil moisture retention curve. Soil Sci. Soc. Am. J. 65:638-648.
18. Cosby, B.J., G.M. Hornberger, R.B. Clapp, and T.R. Ginn. 1984. A statistical exploration of the relationships of soil moisture characteristics to the physical properties of soils. Water Resour. Res. 20:682-690.
19. Dane, J.H., and G.C. Topp (ed.). 2002. Methods of soil analysis. Part 4. Physical methods. SSSA Book Ser. 5. SSSA, Madison, WI.
20. de Jong, R., and K. Loebel. 1982. Empirical relations between soil components and retention at 1/3 and 15 atmospheres. Can. J. Soil Sci. 62:343-350.
21. Donatelli, M., J.H.M. Wösten, and G. Belocchi. 2004. Evaluation of pedotransfer functions. p. 357-362. In Y. Pachepsky and W.J. Rawls (ed.) Development of Pedotransfer functions in soil hydrology. Elsevier, Amsterdam.
22. Durner, W. 1994. Hydraulic conductivity estimation for soils with heterogeneous pore structure. Water Resour. Res. 30:211-223.
23. Ehlers, W. 1977. Measurement and calculation of hydraulic conductivity in horizons of tilled and loess-derived soil, Germany. Geoderma 19:293-306.
24. Fatt, I., and H. Dykstra. 1951. Relative permeability studies. Trans. Am. Inst. Min. Metall. Eng. 192:249-256.
25. Fayer, M.J., and C.S. Simmons. 1995. Modified soil water retention functions for all matric suctions. Water Resour. Res. 31:1233-1238.
26. Fuentes, C., R. Haverkamp, and J.-Y. Parlange. 1992. Parameter constraints on closed form soil water relationships. J. Hydrol. 134:117-142.
27. Gardner, W.R. 1958. Some steady state solutions of the unsaturated moisture flow equation with application to evaporation from a water table. Soil Sci. 85:228-232.
28. Gerke, H.H., and M.Th. van Genuchten. 1993. A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media. Water Resour. Res. 29:305-319.
29. Gribb, M.M., I. Forkutsa, A. Hansen, D.G. Chandler, and J.P. McNamara. 2009. The effect of various soil hydraulic property estimates on soil moisture simulations. Vadose Zone J. 8:321-331.
30. Gribb, M.M., R. Kodesova, and S.E. Ordway. 2004. Comparison of soil hydraulic property measurement methods. J. Geotech. Geoenviron. Eng. 130:1084-1095.
31. Guber, A.K., Ya.A. Pachepsky, M.Th. van Genuchten, W.J. Rawls, J. Šimůnek, D. Jacques, T.J. Nicholson, and R.E. Cady. 2006. Field-scale water flow simulations using ensembles of pedotransfer functions for soil water retention. Vadose Zone J. 5:234-247.
32. Guber, A.K., Ya.A. Pachepsky, M.Th. van Genuchten, J. Šimůnek, D. Jacques, A. Nemes, T.J. Nicholson, and R.E. Cady. 2009. Multimodel simulation of water flow in a field soil using pedotransfer functions. Vadose Zone J. 8:1-10.
33. Hartge, K.-H., and R. Horn. 1971. Die physikalische Untersuchung von Böden. Ferdinand-Enke-Verlag, Stuttgart, Germany.
34. Haverkamp, R., F.J. Leij, C. Fuentes, A. Sciortino, and P.J. Ross. 2005. Soil water retention: I. Introduction of a shape index. Soil Sci. Soc. Am. J. 69:1881-1890.
35. Henderson, J.H. 1949. Low pressure mercury injection of reservoir sands. Prod. Mon. 14(1):32.
36. Hillel, D. 2004. Introduction to environmental soil physics. Elsevier, Amsterdam.
37. Ippisch, O., H.J. Vogel, and P. Bastian. 2006. Validity limits for the van Genuchten-Mualem model and implications for parameter estimation and numerical simulation. Adv. Water Resour. 29:1780-1789.
38. Jagtap, S.S., U. Lall, J.W. Jones, A.J. Gijsman, and J.T. Ritchie. 2004. Dynamic nearest-neighbor method for estimating soil water parameters. Trans. ASAE 47:1437-1444.
39. Jana, R.B., B.P. Mohanty, and E.P. Springer. 2007. Multiscale pedotransfer functions for soil water retention. Vadose Zone J. 6:868-878.
40. Jarvis, N. 2008. Near-saturated hydraulic properties of macroporous soils. Vadose Zone J. 7:1256-1264.
41. Jarvis, N.J. 2007. A review of non-equilibrium water flow and solute transport in soil macropores: Principles, controlling factors and consequences for water quality. Eur. J. Soil Sci. 58:523-546.
42. Jarvis, N.J., L. Zavattaro, K. Rajkai, W.D. Reynolds, P.-A. Olsen, M. McGechan, M. Mecke, B. Mohanty, P.B. Leeds-Harrison, and D. Jacques. 2002. Indirect estimation of near-saturated hydraulic conductivity from readily available soil information. Geoderma 108:1-17.
43. Javaux, M., and M. Vanclooster. 2006. Scale-dependency of the hydraulic properties of a variably saturated heterogeneous sandy subsoil. J. Hydrol. 327:376-388.
44. Kaveh, F., and M.Th. van Genuchten. 1992. A further look at a new unsaturated hydraulic conductivity equation. Iran. J. Agric. Sci. 23:24-32.
45. Khlosi, M., W.M. Cornelis, A. Douaik, M.Th. van Genuchten, and D. Gabriels. 2008. Performance evaluation of models that describe the soil water retention curve between saturation and oven dryness. Vadose Zone J. 7:87-96.
46. Khlosi, M., W.M. Cornelis, D. Gabriels, and G. Sin. 2006. Simple modification to describe the soil water retention curve between saturation and oven dryness. Water Resour. Res. 42, W11501:doi:10.1029/2005WR004699.
47. Kosugi, K. 1996. Lognormal distribution model for unsaturated soil hydraulic properties. Water Resour. Res. 32:2697-2703.
48. Kosugi, K. 1999. General model for unsaturated hydraulic conductivity for soils with lognormal pore-size distribution. Soil Sci. Soc. Am. J. 63:270-277.
49. Lamorski, K., Y. Pachepsky, C. Slawihski, and R.T. Walczak. 2008. Using suppor vector machines to develop pedotransfer functions for water retention of soils in Poland. Soil Sci. Soc. Am. J. 72:1243-1247.
50. Larsbo, M., S. Roulier, F. Stenemo, R. Kasteel, and N. Jarvis. 2005. An improved dual-permeability model of water flow and solute transport in the vadose zone. Vadose Zone J. 4:398-406.
51. Leij, F.J., W.J. Alves, M.Th. van Genuchten, and J.R. Williams. 1996. The UNSODA unsaturated soil hydraulic database. Rep. EPA/600/R-96/095. USEPA Natl. Risk Manage. Lab., Cincinnati, OH.
52. Leij, F.J., N. Romano, M. Palladino, M.G. Schaap, and A. Coppola. 2004. Topographical attributes to predict soil hydraulic properties along a hillslope transect. Water Resour. Res. 40:W02407, doi:10.1029/2002WR001641.
53. Lennartz, F., H.O. Müller, V. Nollau, G.H. Schmitz, and S.A. El-Shehawy. 2008. Statistical evaluation and choice of soil water retention models. Water Resour. Res. 44:W12424, doi:10.1029/2007WR006138.
54. Lenormand, R. 1990. Liquids in porous media. J. Phys. Condens. Matter 2:SA79-SA88.
55. Li, Y., and N.C. Wardlaw. 1986. Mechanisms of nonwetting phase trapping during imbibition at slow rates. J. Colloid Interface Sci. 109:473-486.
56. Lilly, A., A. Nemes, W.J. Rawls, and Y.A. Pachepsky. 2008. Probabilistic approach to the identification of input variables to estimate hydraulic conductivity. Soil Sci. Soc. Am. J. 72:16-24.
57. Lin, H.S., K.J. McInnes, L.P. Wilding, and C.T. Hallmark. 1999. Effects of soil morphology on hydraulic properties: II. Hydraulic pedotransfer functions. Soil Sci. Soc. Am. J. 63:955-961.
58. Luckner, L., M.Th. van Genuchten, and D.R. Nielsen. 1989. A consistent set of parametric models for the two-phase flow of immiscible fluids in the subsurface. Water Resour. Res. 25:2187-2193.
59. Mallants, D., D. Jacques, P.H. Tseng, M.Th. van Genuchten, and J. Feyen. 1997. Comparison of three hydraulic property measurement methods. J. Hydrol. 199:295-318.
60. Mallants, D., P.H. Tseng, M. Vanclooster, and J. Feyen. 1998. Predicted drainage for a sandy loam soil: Sensitivity to hydraulic property description. J. Hydrol. 206:136-148.
61. McCuen, R.H., W.J. Rawls, and D.L. Brakensiek. 1981. Statistical analysis of the Brooks-Corey and the Green-Ampt parameters across soil textures. Water Resour. Res. 17:1005-1013.
62. Minasny, B., and A.B. McBratney. 2002. Uncertainty analysis for pedotransfer functions. Eur. J. Soil Sci. 53:417-429.
63. Mohanty, B.P., R.S. Bowman, J.M.H. Hendrickx, and M.Th. van Genuchten. 1997. New piecewise-continuous hydraulic functions for modeling preferen tial flow in an intermittent-flood-irrigated field. Water Resour. Res. 33:2049-2063.
64. Mualem, Y. 1976. New model for predicting hydraulic conductivity of unsaturated porous media. Water Resour. Res. 12:513-522.
65. Mualem, Y., and G. Dagan. 1978. Hydraulic conductivity of soils: Unified approach to statistical models. Soil Sci. Soc. Am. J. 42:392-395.
66. Nemes, A., W.J. Rawls, and Y.A. Pachepsky. 2006a. Use of the nonparametric nearest neighbor approach to estimate soil hydraulic properties. Soil Sci. Soc. Am. J. 70:327-336.
67. Nemes, A., W.J. Rawls, Y.A. Pachepsky, and M.Th. van Genuchten. 2006b. Sensitivity analysis of the nonparametric nearest neighbor technique to estimate soil water retention. Vadose Zone J. 5:1222-1235.
68. Nemes, A., M.G. Schaap, F.J. Leij, and J.H.M. Wösten. 2001. Description of the unsaturated soil hydraulic database UNSODA version 2.0. J. Hydrol. 251:151-162.
69. Nemes, A., M.G. Schaap, and J.H.M. Wösten. 2003. Functional evaluation of pedotransfer functions derived from different scales of data collection. Soil Sci. Soc. Am. J. 67:1093-1102.
70. Nielsen, D.R., and L. Luckner. 1992. Theoretical aspects to estimate reasonable initial parameters and range limits in identification procedures for soil hydraulic properties. p. 147-160. In M.Th. van Genuchten et al. (ed.) Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
71. Nimmo, J.R. 1991. Comment on the treatment of residual water content in "A consistent set of parametric models for the two-phase flow of immiscible fluids in the subsurface" by L. Luckner et al. Water Resour. Res. 27:661-662.
72. Pachepsky, Y., W.J. Rawls, and D. Gimenez. 2001. Comparison of soil water retention at field and laboratory scales. Soil Sci. Soc. Am. J. 65:460-462.
73. Pachepsky, Y., W. Rawls, and D. Timlin. 2000. A one-parameter relationship between unsaturated hydraulic conductivity and water retention. Soil Sci. 165:911-919.
74. Pachepsky, Y.A., J.W. Crawford, and W.J. Rawls. 1999. Fractals in soil science: Preface. Geoderma 88(3-4): 5.
75. Pachepsky, Y.A., and W.J. Rawls (ed.). 2004. Development of pedotransfer functions in soil hydrology. Dev. Soil Sci. 30. Elsevier, Amsterdam.
76. Pachepsky, Y.A., W.J. Rawls, and H.S. Lin. 2006. Hydropedology and pedotransfer functions. Geoderma 131:308-316.
77. Pachepsky, Y.A., D. Timlin, and G. Várallyay. 1996. Artificial neural networks to estimate soil water retention from easily measurable data. Soil Sci. Soc. Am. J. 60:727-733.
78. Peters, A., and W. Durner. 2006. Improved estimation of soil water retention characteristics from hydrostatic column experiments. Water Resour. Res. 42:W11401, doi:10.1029/2006WR004952.
79. Priesack, E., and W. Durner. 2006. Closed-form expression for the multi-modal unsaturated conductivity function. Vadose Zone J. 5:121-124.
80. Pringle, M.J., and R.M. Lark. 2007. Scale- and location-dependent correlations of soil strength and the yield of wheat. Soil Tillage Res. 95:47-60.
81. Pringle, M.J., N. Romano, B. Minasny, G.B. Chirico, and R.M. Lark. 2007. Spatial evaluation of pedotransfer functions using wavelet analysis. J. Hydrol. 333:182-198.
82. Puckett, W.E., J.H. Dane, and B.F. Hajek. 1985. Physical and mineralogical data to determine soil hydraulic properties. Soil Sci. Soc. Am. J. 49:831-836.
83. Rajkai, K., and G. Várallyay. 1992. Estimating soil water retention from simpler properties by regression techniques. p. 417-426. In M.Th. van Genuchten et al. (ed.) Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
84. Rawls, W.J., and D.L. Brakensiek. 1982. Estimating soil water retention from soil properties. J. Irrig. Drain. Div. Am. Soc. Civ. Eng. 108:166-171.
85. Rawls, W.J., and D.L. Brakensiek. 1985. Prediction of soil water properties for hydrologic modelling. p. 293-299. In E. Jones and T.J. Ward (ed.) Proc. Symp. Watershed Management in the Eighties, Denver, CO. 29 Apr.-3 May. Am. Soc. Civ. Eng., New York.
86. Rawls, W.J., and Y.A. Pachepsky. 2002. Using field topographic descriptors to estimate soil water retention. Soil Sci. 167:423-435.
87. Romano, N., and M. Palladino. 2002. Prediction of soil water retention using soil physical data and terrain attributes. J. Hydrol. 265:56-75.
88. Ross, P.J., J. Williams, and K.L. Bristow. 1991. Equation for extending water retention to dryness. Soil Sci. Soc. Am. J. 55:923-927.
89. Rossi, C., and J.R. Nimmo. 1994. Modelling of soil water retention from saturation to oven dryness. Water Resour. Res. 30:701-708.
90. Schaap, M.G. 2004. Accuracy and uncertainty in PTF predictions. p. 33-43. In Y. Pachepsky and W.J. Rawls (ed.) Development of pedotransfer functions in soil hydrology. Elsevier, Amsterdam.
91. Schaap, M.G., and W. Bouten. 1996. Modeling water retention curves of sandy soils using neural networks. Water Resour. Res. 32:3033-3040.
92. Schaap, M.G., and F.J. Leij. 1998a. Database-related accuracy and uncertainty of pedotransfer functions. Soil Sci. 163:765-779.
93. Schaap, M.G., and F.J. Leij. 1998b. Using neural networks to predict soil water retention and soil hydraulic conductivity. Soil Tillage Res. 47:37-42.
94. Schaap, M.G., and F.J. Leij. 2000. Improved prediction of unsaturated hydraulic conductivity with the Mualem-van Genuchten model. Soil Sci. Soc. Am. J. 64:843-851.
95. Schaap, M.G., F.J. Leij, and M.Th. van Genuchten. 1998. Neural network analysis for hierarchical prediction of soil hydraulic properties. Soil Sci. Soc. Am. J. 62:847-855.
96. Schaap, M.G., F.J. Leij, and M.Th. van Genuchten. 1999. Bootstrap-neural network approach to predict soil hydraulic properties. p. 1237-1250. In M.Th. van Genuchten et al. (ed.) Proc. Int. Worksh. on Characterization and Measurement of the Hydraulic Properties of Unsaturated Porous Media, Riverside, CA. 22-24 Oct. 1997. U.S. Salinity Lab., Riverside, CA.
97. Schaap, M.G., F.J. Leij, and M.Th. van Genuchten. 2001. ROSETTA: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer functions. J. Hydrol. 251:163-176.
98. Schaap, M.G., M.L. Porter, B.S.B. Christensen, and D. Wildenschild. 2007. Comparison of pressure-saturation characteristics derived from computed tomography and lattice Boltzmann simulations. Water Resour. Res. 43:W12S06, doi:10.1029/2006WR005730.
99. Schaap, M.G., and M.Th. van Genuchten. 2006. A modified Mualem-van Genuchten formulation for improved description of the hydraulic conductivity near saturation. Vadose Zone J. 5:27-34.
100. Scheinost, A.C., W. Sinowski, and K. Auerswald. 1997. Regionalization of soil water retention curves in a highly variable soilscape: 1. Developing a new pedotransfer function. Geoderma 78:129-143.
101. Schuh, W.M., and R.L. Cline. 1990. Effect of soil properties on unsaturated hydraulic conductivity pore-interaction factors. Soil Sci. Soc. Am. J. 54:1509-1519.
102. Sharma, S.K., B.P. Mohanty, and J.T. Zhu. 2006. Including topography and vegetation attributes for developing pedotransfer functions. Soil Sci. Soc. Am. J. 70:1430-1440.
103. Shein, E.V., and T.A. Arkhangel'skaya. 2006. Pedotransfer functions: State of the art, problems, and outlooks. Eurasian Soil Sci. 39:1089-1099.
104. Stolte, J., J.I. Freijer, W. Bouten, C. Dirksen, J.M. Halbertsma, J.C. Van Dam, J.A. Van den Berg, G.J. Veerman, and J.H.M. Wösten. 1994. Comparison of six methods to determine unsaturated soil hydraulic conductivity. Soil Sci. Soc. Am. J. 58:1596-1603.
105. Stumpp, C., S. Engelhardt, M. Hofmann, and B. Huwe. 2009. Evaluation of pedotransfer functions for estimating soil hydraulic properties of prevalent soils in a catchment of the Bavarian Alps. Eur. J. For. Res. 128:609-620.
106. Tietje, O., and M. Tapkenhinrichs. 1993. Evaluation of pedotransfer functions. Soil Sci. Soc. Am. J. 57:1088-1095.
107. Timlin, D., and Y.A. Pachepsky. 1998. Measurement of unsaturated soil hydraulic conductivities using a ceramic cup tensiometer. Soil Sci. 163:625-635.
108. Tomasella, J., and M.G. Hodnett. 1998. Estimating soil water retention characteristics from limited data in Brazilian Amazonia. Soil Sci. 163:190-202.
109. Tomasella, J., M.G. Hodnett, and L. Rossato. 2000. Pedotransfer functions for the estimation of soil water retention in Brazilian soils. Soil Sci. Soc. Am. J. 64:327-338.
110. Tomasella, J., Y.A. Pachepsky, S. Crestana, and W.J. Rawls. 2003. Comparison of two techniques to develop pedotransfer functions for water retention. Soil Sci. Soc. Am. J. 67:1085-1092.
111. Tsang, Y.W., and K. Pruess. 1987. A study of thermally induced convection near a high level nuclear waste repository in partially saturated fractured tuff. Water Resour. Res. 23:1958-1966.
112. Tuller, M., and D. Or. 2001. Hydraulic conductivity of variably saturated porous media: Film and corner flow in angular pore space. Water Resour. Res. 37:1257-1276.
113. Tuller, M., D. Or, and L.M. Dudley. 1999. Adsorption and capillary condensation in porous media: Liquid retention and interfacial configurations in angular pores. Water Resour. Res. 35:1949-1964.
114. Twarakavi, N.K.C., J. Šimůnek, and M.G. Schaap. 2009. Development of pedotransfer functions for estimation of soil hydraulic parameters using support vector machines. Soil Sci. Soc. Am. J. 73:1443-1452.
115. van den Berg, M., E. Klamt, L.P. van Reeuwijk, and W.G. Sombroek. 1997. Pedotransfer functions for the estimation of moisture retention characteristics of Ferralsols and related soils. Geoderma 78:161-180.
116. van Genuchten, M.Th. 1980. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44:892-898.
117. van Genuchten, M.Th., F.J. Leij, and L.J. Lund (ed.). 1992. Indirect methods for estimating the hydraulic properties of unsaturated soils. U.S. Salinity Lab., Riverside, CA.
118. van Genuchten, M.Th., F.J. Leij, and L. Wu. 1999. Characterization and measurement of the hydraulic properties of unsaturated porous media: Proceedings of the international workshop, Riverside, CA. 22-24 Oct. 1997. U.S. Salinity Lab., Riverside, CA.
119. van Genuchten, M.Th., and D.R. Nielsen. 1985. On describing and predicting the hydraulic conductivity of unsaturated soils. Ann. Geophys. 3:615-627.
120. Vereecken, H. 1995. Estimating the unsaturated hydraulic from theoretical models using simple soil properties. Geoderma 65:81-92.
121. Vereecken, H., J. Diels, J. Vanorshoven, J. Feyen, and J. Bouma. 1992. Functional evaluation of pedotransfer functions for the estimation of soil hydraulic properties. Soil Sci. Soc. Am. J. 56:1371-1378.
122. Vereecken, H., J. Maes, and J. Feyen. 1990. Estimating unsaturated hydraulic conductivity from easily measured soil properties. Soil Sci. 149:1-12.
123. Vereecken, H., J. Maes, J. Feyen, and P. Darius. 1989. Estimating the soil moisture retention characteristic from texture, bulk density, and carbon content. Soil Sci. 148:389-403.
124. Vogel, T., and M. Cislerova. 1988. On the reliability of unsaturated hydraulic conductivity calculated from the moisture retention curve. Transp. Porous Media 3:1-15.
125. Vogel, T., M.Th. van Genuchten, and M. Cislerova. 2000. Effect of the shape of the soil hydraulic functions near saturation on variably-saturated flow predictions. Adv. Water Resour. 24:133-144.
126. Wagner, B., V.R. Tarnawski, V. Hennings, U. Müller, G. Wessolek, and R. Plagge. 2001. Evaluation of pedo-transfer functions for unsaturated soil hydraulic conductivity using an independent data set. Geoderma 102:275-297.
127. Weynants, M., H. Vereecken, and M. Javaux. 2009. Revisiting Vereecken pedotransfer functions: Introducing a closed-form hydraulic model. Vadose Zone J. 8:86-95.
128. White, N.F., D.K. Sunada, H.R. Duke, and A.T. Corey. 1972. Boundary effects in desaturation of porous media. Soil Sci. 113:7-12.
129. Whitmore, A.P. 1991. A method for assessing the goodness of computer simulation of soil processes. J. Soil Sci. 42:289-299.
130. Wösten, J.H.M., A. Lilly, A. Nemes, and C. Le Bas. 1999. Development and use of a database of hydraulic properties of European soils. Geoderma 90:169-185.
131. Wösten, J.H.M., Y.A. Pachepsky, and W.J. Rawls. 2001. Pedotransfer functions: Bridging the gap between available basic soil data and missing soil hydraulic characteristics. J. Hydrol. 251:123-150.
132. Wösten, J.H.M., and M.Th. van Genuchten. 1988. Using texture and other soil properties to predict the unsaturated soil hydraulic functions. Soil Sci. Soc. Am. J. 52:1762-1770.
133. Wösten, J.H.M., G.J. Veerman, and J. Stolte. 1994. Waterretentie en doorlatendheidskarakteris tieken van boven en ondergronden in Nederland: De Staringreeks. Winand Staring Ctr., Wageningen, the Netherlands.
134. Yates, S.R., M.Th. van Genuchten, A.W. Warrick, and F.J. Leij. 1992. Analysis of measured, predicted, and estimated hydraulic conductivity using the RETC computer program. Soil Sci. Soc. Am. J. 56:347-354.
135. Ye, M., R. Khaleel, M.G. Schaap, and J.T. Zhu. 2007. Simulation of field injection experiments in heterogeneous unsaturated media using cokriging and artificial neural network. Water Resour. Res. 43:W07413, doi:10.1029/2006WR005030.