Published online 8 March 2006
Published in Vadose Zone J 5:129-139 (2006)
DOI: 10.2136/vzj2006.0004
© 2006 Soil Science Society of America
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From Field- to Landscape-Scale Vadose Zone Processes: Scale Issues, Modeling, and Monitoring
Dennis L. Corwina,*,
Jan Hopmansb and
Gerrit H. de Rooijc
a USDA-ARS, George E. Brown, Jr. Salinity Laboratory, 450 West Big Springs Road, Riverside, CA 92507-4617
b Department of Land, Air, and Water Resources, 123 Veihmeyer Hal, University of California, Davis, CA 95616
c Department of Environmental Sciences, Soil Physics, Ecohydrology and Groundwater Quality Group, Wageningen University, Nieuwe Kanaal 11 6709 PA, Wageningen, The Netherlands

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Fig. 1. Organizational hierarchy of spatial scales pertinent to environmental models (redrawn from Hoosbeek and Bryant, 1993).
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Fig. 2. Hypothetical variogram for scale-dependent hydraulic conductivity (redrawn from Gelhar, 1986).
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Fig. 3. Dependence of longitudinal dispersivity on overall displacement scale for tracer tests, environmental tracers, and numerical simulations (redrawn from Gelhar et al., 1992).
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Copyright © 2006 by the Soil Science Society of America.