The obtained results of the present study showed the good applicability of the van Genuchten equation for parameterizing NAPL retention data of soils (R2 = 0.99).Sufficient applicability of continuous PTFs for estimating the parameters of NAPL retention curves was found (R2 for α, n and θs was 0.47, 0.84 and 0.86, respectively).The accuracy of parametric and point PTFs increased in case derived values of the independent variables in addition to the PSD (particle size distribution) fractions, bulk density, CaCO3 and organic matter content (R2 = 0.57–0.90 and RMSE = 2.43–5.67 vol%) were used, as compared to PTFs using only the original values of basic soil parameters as predictor variables (R2 = 0,48–0.86; RMSE = 3.56–6.83 vol%).According to the gained results, PTFs seem to be similarly accurate if the particle size distribution of soils — determined by different standard methods — are applied as independent variables.
Børgesen, C. D. et al., 2008. Pedotransfer functions estimating soil hydraulic properties using different soil parameters. Hydrological Processes. 22. 1630–1639.
Børgesen C. D. , 'Pedotransfer functions estimating soil hydraulic properties using different soil parameters ' (2008 ) 22 Hydrological Processes : 1630 -1639 .
Carsel, R. F. & Parrish, R. S., 1988. Developing joint probability distribution of soil water retention characteristics. Water Resources Research. 24. 755–769.
Parrish R. S. , 'Developing joint probability distribution of soil water retention characteristics ' (1988 ) 24 Water Resources Research : 755 -769 .
Chen, J., Hopmanns, J. W. & Grismer, M. E., 1999. Parameter estimation of two-fluid capillary pressure-saturation and permeability functions. Advances in Water Resources. 22. 479–493.
Grismer M. E. , 'Parameter estimation of two-fluid capillary pressure-saturation and permeability functions ' (1999 ) 22 Advances in Water Resources : 479 -493 .
Cornelis, W. M. et al., 2005. Comparison of unimodal analytical expressions for the soil-water retention curve. Soil Sci. Soc. Am. J. 69. 1902–1911.
Cornelis W. M. , 'Comparison of unimodal analytical expressions for the soil-water retention curve ' (2005 ) 69 Soil Sci. Soc. Am. J. : 1902 -1911 .
Demond, A. H. & Roberts, P. V., 1991. Effects of interfacial forces on the two-phase capillary-pressure relationships. Water Resources Research. 27. 423–437.
Roberts P. V. , 'Effects of interfacial forces on the two-phase capillary-pressure relationships ' (1991 ) 27 Water Resources Research : 423 -437 .
Depastrovitch, T. L. et al., 1979. Protection of groundwater from oil pollution. CONCAWE Rep. No 3/79. CONCAWE (Conservation of Clean Air and Water — Europe). The Hague, The Netherlands.
Depastrovitch T. L. , '', in Protection of groundwater from oil pollution , (1979 ) -.
Dunai, A., Makó, A. & Barna, Gy., 2013. Air permeability of soils. (In Hungarian) Agrokémia és Talajtan. 62. 415–426.
Barna Gy. , 'Air permeability of soils ' (2013 ) 62 (In Hungarian) Agrokémia és Talajtan : 415 -426 .
Fodor, N. & Rajkai, K., 2011. Computer program (SOILarium 1.0) for estimating the physical and hydrophysical properties of soils from other soil characteristics. Agrokémia és Talajtan. 60. Suppl. 27–40.
Rajkai K. , 'Computer program (SOILarium 1.0) for estimating the physical and hydrophysical properties of soils from other soil characteristics ' (2011 ) 60 Agrokémia és Talajtan : 27 -40 .
Hernádi, H. & Makó, A., 2014. Dataset for creating pedotransfer functions to estimate organic liquid retention of soils. Journal of Environmental Geography. Submitted.
Makó A. , '', in Journal of Environmental Geography , (2014 ) -.
Keller, J. M. & Simons, C. S., 2005. The Influence of Selected Liquid and Soil Properties on the Propagation of Spills over Flat Permeable Surfaces. U.S. Department of Energy. Richland, Washington.
Simons C. S. , '', in The Influence of Selected Liquid and Soil Properties on the Propagation of Spills over Flat Permeable Surfaces , (2005 ) -.
Kemper, W. D. & Rosenau, R. C., 1986. Aggregate stability and size distribution. In: Methods of Soil Analysis. Part 1 (Ed.: Klute, A.). 425–442. 2nd ed. Agronomy Monograph. 9. ASA and SSSA. Madison, Wisc.
Rosenau R. C. , '', in Methods of Soil Analysis , (1986 ) -.
Lamorsky, K. et al., 2008. Using support vector machines to develop pedotransfer functions for water retention of soils in Poland. Soil Sci. Soc. Am. J. 72. 1243–1247.
Lamorsky K. , 'Using support vector machines to develop pedotransfer functions for water retention of soils in Poland ' (2008 ) 72 Soil Sci. Soc. Am. J. : 1243 -1247 .
Lenhard, R. J. & Parker, J. C., 1987. Measurement and prediction of saturationpressure relations in three phase porous media systems. Journal of Contaminant Hydrology. 1. 407–424.
Parker J. C. , 'Measurement and prediction of saturationpressure relations in three phase porous media systems ' (1987 ) 1 Journal of Contaminant Hydrology : 407 -424 .
Leverett, M. C., 1941. Capillary behavior in porous solids. Trans. Society of Petroleum Engineers. American Institute of Mechanical Engineers. 142. 152–169.
Leverett M. C. , 'Capillary behavior in porous solids. Trans. Society of Petroleum Engineers ' (1941 ) 142 American Institute of Mechanical Engineers : 152 -169 .
Makó, A., 2002. Measuring and estimating the pressure-saturation curves on undisturbed soil samples using water and NAPL. Agrokémia és Talajtan. 51. 27–36.
Makó A. , 'Measuring and estimating the pressure-saturation curves on undisturbed soil samples using water and NAPL ' (2002 ) 51 Agrokémia és Talajtan : 27 -36 .
Makó, A., 2005. Measuring the two-phase capillary pressure-saturation curves of soil samples saturated with nonpolar liquids. Commun. Soil Sci. Plant Anal. 36. 439–453.
Makó A. , 'Measuring the two-phase capillary pressure-saturation curves of soil samples saturated with nonpolar liquids ' (2005 ) 36 Commun. Soil Sci. Plant Anal. : 439 -453 .
Makó, A. et al., 2005. Estimating soil water retention characteristics from the soil taxonomic classification and mapping information: consideration of humus categories. Cereal Res. Commun. 34. 199–201.
Makó A. , 'Estimating soil water retention characteristics from the soil taxonomic classification and mapping information: consideration of humus categories ' (2005 ) 34 Cereal Res. Commun. : 199 -201 .
McBratney, A. B. et al., 2002. From pedotransfer functions to soil inference systems. Geoderma. 109. 41–73.
McBratney A. B. , 'From pedotransfer functions to soil inference systems ' (2002 ) 109 Geoderma : 41 -73 .
Minasny, B., McBratney, A. B. & Bristow, K. L., 1999. Comparison of different approaches to the development of pedotransfer functions for water-retention curves. Geoderma. 93. 225–253.
Bristow K. L. , 'Comparison of different approaches to the development of pedotransfer functions for water-retention curves ' (1999 ) 93 Geoderma : 225 -253 .
Nemes, A., Schaap, M. G. & Wösten, J. H. M., 2003. Functional evaluation of pedotransfer functions derived from different scales of data collection. Soil Sci. Soc. Am. J. 67. 1093–1102.
Wösten J. H. M. , 'Functional evaluation of pedotransfer functions derived from different scales of data collection ' (2003 ) 67 Soil Sci. Soc. Am. J. : 1093 -1102 .
Nemes, A. et al., 2008. Software to estimate-33 and-1500 kPa soil water retention using the non-parametric k-nearest neighbor technique. Environmental Modelling & Software. 23. (2) 254–255.
Nemes A. , 'Software to estimate-33 and-1500 kPa soil water retention using the non-parametric k-nearest neighbor technique ' (2008 ) 23 Environmental Modelling & Software : 254 -255 .
Pachepsky, Y. A. & Rawls, W. J. (Eds.), 2004. Development of Pedotransfer Functions in Soil Hydrology. Developments in Soil Science. Elsevier. Amsterdam.
'', in Development of Pedotransfer Functions in Soil Hydrology. Developments in Soil Science , (2004 ) -.
Rajkai, K., Kabos, S. & Van Genuchten, M. T., 2004. Estimating the water retention curve from soil properties: Comparison of linear, nonlinear and concomitant variable methods. Soil and Tillage Research. 79. (2) 145–152.
Genuchten M. T. , 'Estimating the water retention curve from soil properties: Comparison of linear, nonlinear and concomitant variable methods ' (2004 ) 79 Soil and Tillage Research : 145 -152 .
Rathfelder, K. & Abriola, L. M., 1996. The influence of capillarity in numerical modelling of organic liquid redistribution in two-phase systems. Advances in Water Resources. 21. (2) 159–170.
Abriola L. M. , 'The influence of capillarity in numerical modelling of organic liquid redistribution in two-phase systems ' (1996 ) 21 Advances in Water Resources : 159 -170 .
Schaap, M. G. & Leij, F. J., 1998. Database-related accuracy and uncertainty of pedotransfer functions. Soil Science. 163. 765–779.
Leij F. J. , 'Database-related accuracy and uncertainty of pedotransfer functions ' (1998 ) 163 Soil Science : 765 -779 .
Schaap, M. G., Leij, F. J. & Van Genuchten, M. T., 1999. A bootstrap-neural network approach to predict soil hydraulic parameters. In: Proc. Int. Workshop, Characterization and Measurements of the Hydraulic Properties of Unsaturated Porous Media. (Eds.: Van Genuchten, M. Th., Leij, F. J. & Wu, L.) 1237–1250. University of California. Riverside, CA.
Genuchten M. T. , '', in Proc. Int. Workshop, Characterization and Measurements of the Hydraulic Properties of Unsaturated Porous Media , (1999 ) -.
Scheinost, A. C., Sinowski, W. & Auerswald, K., 1997. Regionalization of soil water retention curves in a highly variable soilscape: 1. Developing a new pedotransfer function. Geoderma. 78. 129–143.
Auerswald K. , 'Regionalization of soil water retention curves in a highly variable soilscape: 1. Developing a new pedotransfer function ' (1997 ) 78 Geoderma : 129 -143 .
Stumpp, C. et al., 2009. Evaluation of pedotransfer functions for estimating soil hydraulic properties of prevalent soils in a catchment of the Bavarian Alps. European Journal of Forest Research. 128. 609–620.
Stumpp C. , 'Evaluation of pedotransfer functions for estimating soil hydraulic properties of prevalent soils in a catchment of the Bavarian Alps ' (2009 ) 128 European Journal of Forest Research : 609 -620 .
Tomasella, J. & Hodnet, M. G., 1998. Estimating soil water retention characteristics from limited data in Brazilian Amazonia. Soil Science. 163. 190–202.
Hodnet M. G. , 'Estimating soil water retention characteristics from limited data in Brazilian Amazonia ' (1998 ) 163 Soil Science : 190 -202 .
Tóth, B. et al., 2013. Comparison of pedotransfer functions to estimate the van Genuchten parameters from soil survey information. (In Hungarian) Agrokémia és Talajtan. 62. 5–22.
Tóth B. , 'Comparison of pedotransfer functions to estimate the van Genuchten parameters from soil survey information ' (2013 ) 62 (In Hungarian) Agrokémia és Talajtan : 5 -22 .
Van Genuchten, M. T., 1980. A closed form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J. 44. 892–989.
Genuchten M. T. , 'A closed form equation for predicting the hydraulic conductivity of unsaturated soils ' (1980 ) 44 Soil Sci. Soc. Am. J. : 892 -989 .
Vereecken, H. et al., 1989. Estimating the soil moisture retention characteristic from texture, bulk density and carbon content. Soil Sci. 148. 389–403.
Vereecken H. , 'Estimating the soil moisture retention characteristic from texture, bulk density and carbon content ' (1989 ) 148 Soil Sci. : 389 -403 .
Wösten, J. H. M. et al., 1999. Development and use of a database of hydraulic properties of European soils. Geoderma. 90. 169–185.
Wösten J. H. M. , 'Development and use of a database of hydraulic properties of European soils ' (1999 ) 90 Geoderma : 169 -185 .