Ponded infiltration experiment is a simple test used for in-situ determination of soil hydraulic properties, particularly saturated hydraulic conductivity and sorptivity. It is known that infiltration process in natural soils is strongly affected by presence of macropores, soil layering, initial and experimental conditions etc. As a result, infiltration record encompasses a complex of mutually compensating effects that are difficult to separate from each other. Determination of sorptivity and saturated hydraulic conductivity from such infiltration data is complicated. In the present study we use numerical simulation to examine the impact of selected experimental conditions and soil profile properties on the ponded infiltration experiment results, specifically in terms of the hydraulic conductivity and sorptivity evaluation. The effect of following factors was considered: depth of ponding, ring insertion depth, initial soil water content, presence of preferential pathways, hydraulic conductivity anisotropy, soil layering, surface layer retention capacity and hydraulic conductivity, and presence of soil pipes or stones under the infiltration ring. Results were compared with a large database of infiltration curves measured at the experimental site Liz (Bohemian Forest, Czech Republic). Reasonably good agreement between simulated and observed infiltration curves was achieved by combining several of factors tested. Moreover, the ring insertion effect was recognized as one of the major causes of uncertainty in the determination of soil hydraulic parameters.
ASTM Standard D3385-09, 2009. Standard Test Method for Infiltration Rate of Soils in Field Using Double-Ring Infiltrometer. West Conshohocken, PA, www.astm.org.
Bagarello, V, Iovino, M., Lai, J., 2013. Field and numerical tests of the two ponding depth procedure for analysis of single- ring pressure infiltrometer data. Pedosphere, 2, 779-789.
Cislerova, M., Šimůnek, J., Vogel, T., 1988. Changes of steadystate infiltration rates in recurrent ponding infiltration experiments. J. Hydrol., 104, 1-16.
Dohnal, M., Dušek, J., Vogel, T., Císlerová, M., Lichner, Ľ., Štekauerová, V., 2009. Ponded infiltration into soil with biopores - field experiment and modeling. Biologia, 64, 580-584.
Dohnal, M., Dusek, J., Vogel, T., 2010. Improving hydraulic conductivity estimates from minidisk infiltrometer measurements for soils with wide pore-size distributions. Soil Sci. Soc. Am. J., 74, 804-811.
Dohnal, M., Jelinková, V., Snehota, M., Dusek, J., Brezina, J., 2013. Three-dimensional numerical analysis of water flow affected by entrapped air: application of noninvasive imaging techniques. Vadose Zone J., 12, 1, DOI: 10.2136/vzj2012.0078
Dusek, J., Dohnal, M., Vogel, T., 2009. Numerical analysis of ponded infiltration experiment under different experimental conditions. Soil & Water Res., 4, S22-S27.
Ganz, Ch., Bachmann, J., Noell, U. et al., 2014. Hydraulic modeling and in situ electrical resistivity tomography to analyze ponded infiltration into a water repellent sand. Vadose Zone J., 13, 1, DOI:10.2136/vzj2013.04.0074
Gerke, H.H., van Genuchten, M.Th., 1993. A dual-porosity model for simulating the preferential movement of water and solutes in structured porous media. Water Resour. Res., 29, 305-319.
Haverkamp, R., Ross, P.J., Smettem, K.R.J., Parlange, J.-Y., 1994. Three dimensional analysis of infiltration from the disc infiltrometer: 2. Physically-based infiltration equation. Water Resour. Res., 30, 2931-2935.
Hillel, D., 1998. Environmental Soil Physics. Elsevier Academic Press, San Diego, CA, USA.
Hogarth, W.L., Lockington, D.A., Barry, D.A., Parlange, M.B., Haverkamp, R., Parlange, J.Y., 2013. Infiltration in soils with a saturated surface. Water Resour. Res., 49, 5, 2683-2688.
Johnson, A.I., 1963. A field method for measurement of infiltration. General ground-water techniques. Geological Survey Water-Supply Paper 1544-f.
Miller, E.E., Klute, A., 1967. The dynamics of soil water. Part I - mechanical forces. In: Hagan, R.M., Haise, H.R, Edminster, T.W. (Eds.): Irrigation of Agricultural Lands. Am. Soc. Agron., Madison, WI, USA, pp. 209-244.
Mirus, B.B., Perkins, K.S., Nimmo, J.R., Singha, K., 2008. Hydrologic characterization of desert soils with varying degrees of pedogenesis: 2. Inverse modeling for effective properties. Vadose Zone J., 8, 496-509.
Nakhaei, M., Šimůnek, J., 2014. Parameter estimation of soil hydraulic and thermal property functions for unsaturated porous media using the HYDRUS-2D code. J. Hydrol. Hydromech., 62, 1, 7-15.
Smettem, K.R.J., Parlange, J.-Y., Ross, P.J., Haverkamp, R., 1994. Three dimensional analysis of infiltration from the disc infiltrometer: 1. A capillary based theory. Water Resour. Res., 30, 2925-2929.
Smiles, D.E., Knight, J.H., 1976. A note on the use of the Philip infiltration equation. Aust. J. Soil Res., 10, 143-150.
Turner, N.C., Parlange, J.-Y., 1974. Lateral movement at the periphery of a one-dimensional flow of water. Soil Sci., 118, 70-77.
Vandervaere, J.-P., Peugeot, C., Vauclin, M., Angulo-Jaramillo, R., Lebel, T., 1997. Estimating hydraulic conductivity of crusted soils using disc infiltrometers and minitensiometers. J. Hydrol., 188-189, 203-223.
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.
Vogel, T., Gerke, H.H., Zhang, R., van Genuchten, M.Th., 2000. Modelling flow and transport in a two dimensional dual-permeability system with spatially variable hydraulic properties. J. Hydrol., 238, 78-89.
Vogel, T., van Genuchten, M.Th., Císlerová, M., 2001. Effect of the shape of soil hydraulic functions near saturation on variably-saturated flow predictions. Advances in Water Resources, 24, 133-144.
Votrubova, J., Jelinkova, V., Nemcova, R., Tesar, M., Vogel, T., Cislerova, M., 2010. The soil apparent infiltrability observed with ponded infiltration experiment in a permanent grid of infiltration rings. Geophysical Research Abstracts, Vol. 12, EGU2010-11898.
Votrubova, J., Dohnal, M., Vogel, T., Tesař, M., 2012. On parameterization of heat conduction in coupled soil water and heat flow modelling. Soil & Water Res., 7, 125-137.
Wang D., Feyen J., van Genuchten, M.Th., Nielsen, D.R., 1998. Air entrapment effects on infiltration rate and flow instability. Water Resour. Res., 34, 213-222.
Wang, C., Mao, X., Hatano, R., 2014. Modeling ponded infiltration in fine textured soils with coarse interlayer. Soil Sci. Soc. Am. J., 78, 745-753.
White, I., Sully, M., 1987. Macroscopic and microscopic capillary length and time scales from field infiltration. Water Resour. Res., 23, 1514-1522.
Zhang, R. 1997. Determination of soil sorptivity and hydraulic conductivity from the disk infiltrometer. Soil Sci. Soc. Am. J., 61, 1024-1030.