Ten pedotransfer functions (PTF) estimating soil saturated hydraulic conductivity were investigated using the HunSODA database and the SOILarium 2.0 software. The predicting efficiency of the PTFs was investigated by using statistical indicators, such as the expected value of absolute as well as relative errors. The estimated values, along with measured values of two characteristic Hungarian sites were used in a model application for simulating infiltration during a heavy rainfall event. When choosing a pedotransfer function it is most safe to choose an empirical PTF or a PTF that was developed on a large base dataset applying a not-too-simple not-too-complex formula. Considering the uncertainty related to arbitrary choosing a PTF and using its estimation in a model application, it is more safer to measure than estimate the saturated hydraulic conductivity of the soil.
Ács, F., Horváth, Á. & Breuer, H.,
2008. The role of soil on weather. (In Hungarian) Agrokémia és Talajtan.
Aimrun, W. & Amin, M. S. M.,
2009. Pedo-transfer function for saturated hydraulic conductivity of lowland paddy soils. Paddy Water Environ.
Brakensiek, D. L., Rawls, W. J. & Stephenson, G. R.,
1984. Modifying SCS Hydrologic Soil Groups and Curve Numbers for Rangeland Soils. ASAE paper No. PNR-84203. St. Joseph, MI.
Campbell, G. S.,
1985. Transport models for soil–plant systems. In: Soil Physics with BASIC. 53–54. Elsevier. Amsterdam
Cosby, B. J.
et al., 1984. A statistical exploration of the relationships of soil moisture characteristics to the physical properties of soils. Water Resources Research.
Dane, J. H. & Puckett, W. E.,
1992. Field soil hydraulic properties based on physical and mineralogical information. In: Proc. International Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils. (Eds.: van Genuchten,
M. Th. et al.) 389–403. University of California. Riverside, CA.
Fodor, N. & Rajkai, K.,
2005. Computer program (TALAJTANonc 1.0) for the calculation of the physical and hydrophysical properties of soils from other soil characteristics. (In Hungarian) Agrokémia és Talajtan.
Hack-ten Broeke, M. J. D. & Hegmans, J. H. B. M.,
1996. Use of soil physical characteristics from laboratory measurements or standard series for modeling unsaturated water flow. Agricultural Water Management.
Jabro, J. D.,
1992. Estimation of saturated hydraulic conductivity of soils from particle size distribution and bulk density data. Trans. ASAE.
Klute, A. & Dirksen, C.,
1986. Hydraulic conductivity and diffusivity: laboratory methods. In: Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods. (Ed.: Klute, A.
) 2nd ed. 687–732. Madison, WI.
et al., 2006. Comparison of artificial neural network and regression pedotransfer functions for prediction of soil water retention and saturated hydraulic conductivity. Soil & Tillage Research.
1976. A new model for predicting the hydraulic conductivity of unsaturated porous media. Water Resources Research.
2002 Unsaturated soil hydraulic database of Hungary: HUNSODA. Agrokémia és Talajtan.
Nemes, A., Rawls, W. J. & Pachepsky Y. A.,
2005. Influence of organic matter on the estimation of saturated hydraulic conductivity. Soil Sci. Soc. Am. J.
et al., 2006. Soil water balance scenario studies using predicted soil hydraulic parameters. Hydrological Processes.
Nielsen, D. R., van Genuchten, M. Th. & Biggar, J. W.,
1986. Water flow and solute transport processes in the unsaturated zone. Water Resources Research.
Saxton, K. E.
et al., 1986. Estimating generalized soil water characteristics from texture. Soil Sci. Soc. Am. J.
Šimůnek, J., van Genuchten, M. Th. & Šejna, M.,
2008. Development and applications of the HYDRUS and STANMOD software packages, and related codes. Vadose Zone J.
Suleiman, A. A. & Ritchie, J. T.,
2001. Estimating saturated hydraulic conductivity from soil porosity. Trans. ASAE.
Tyurin, I. V.,
1937. Organicheskoe veschestvo pochvi. Selhozgiz. Moscow.
van Erp, P. J., Houba, V. J. G. & van Beusichem, M. L.,
2001. Effect of drying temperature on amount of nutrient elements extracted with 0.01
soil extraction procedure. Comm. Soil Sci. Plant Anal.
van Genuchten, M. Th.,
1980. A closed form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Sci. Soc. Am. J.
1973a. Soil moisture potential and a new apparatus for the determination of moisture retention curves in the low suction range (0-1 Atmospheres). (In Hungarian) Agrokémia és Talajtan.
1973b. Apparatus for the determination of saturated hydraulic conductivity on undisturbed soil columns. (In Hungarian) Agrokémia és Talajtan.
, 1986. Relationship between the moisture regimes and nutrient regimes of soils. Proc. 9th World Fertilizer Congress, CIEC, Budapest, 1984. 95–106. CIEC, Belgrade–Goettingen–Vienna–Budapest.
, 2006. Soil degradation processes and extreme soil moisture regime as environmental problems in the Carpathian Basin. Agrokémia és Talajtan.