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Published online 24 January 2007
Published in Vadose Zone J 6:1-28 (2007)
DOI: 10.2136/vzj2006.0055
© 2007 Soil Science Society of America
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Upscaling Hydraulic Properties and Soil Water Flow Processes in Heterogeneous Soils

A Review

H. Vereeckena,*, R. Kasteela, J. Vanderborghta and T. Harterb

a Agrosphere (ICG-IV) Inst. of Chemistry and Dynamics of the Geosphere (ICG), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
b Dep. of Land, Air and Water Resources, 113 Veihmeyer Hall, Univ. of California, Davis, CA 95616-8628

Figure 1
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  		Fig. 1. Forward and inverse upscaling methods to upscale soil water flow processes from the local to the field scale.

 

Figure 2
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  		Fig. 2. Scaling of measured soil moisture characteristic curves at the field site using effective saturation (data from Kasteel, 1997).

 

Figure 3
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  		Fig. 3. Comparison of the anisotropic ratios obtained from the stochastic theory and the direct average methods for Maddock sandy loam and for Panoche silty clay loam; H is the mean capillary pressure head (from Yeh et al., 1985c; reproduced with permission of the American Geophysical Union).

 

Figure 4
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  		Fig. 4. Comparison of the means (thick curves) and variations (range of two standard deviations, thin curves) of (a) capillary tension (Pf = log{psi}, where {psi} is pressure head) and (b) soil moisture content ({theta}) predicted by the stochastic model, with parameters semivariogram {lambda} = 5 cm and correlogram {rho} = 2, to measured values at the Jyndevad site. The crosses represent the mean, and the vertical bars indicate the range of variations of the local measurements (from Jensen and Mantoglou, 1992; reproduced by permission of the American Geophysical Union).

 

Figure 5
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  		Fig. 5. Stochastic fusion concept after Yeh and Simunek (2002).

 




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