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A modified upward infiltration method for characterizing soil hydraulic properties

M. H. Young^*,a, A. Karagunduz^b, J. imnek^c and K. D. Pennell^b

^a Division of Hydrologic Sciences, Desert Research Institute, Las Vegas, NV 89119
^b School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332
^c U.S. Salinity Laboratory, USDA–ARS, Riverside, CA 92507

View larger version (22K): [in a new window]   Fig. 1. Schematic of experimental setup.

View larger version (36K): [in a new window]   Fig. 2. Observed pressure head (A) and cumulative flux (B) for uniformily-packed Vinton (Rep 1) and Appling (Rep 2) soils. Observed (symbols) and predicted (line) pressure head (C and D) and cumulative fluxes (E and F) are shown for same replicates for Vinton and Appling soils, respectively. Predicted line may be hidden by symbols. Note different scales for abscissa for A and B.

View larger version (25K): [in a new window]   Fig. 3. Fitted (symbols) and global (line) soil water retention (A and C) and hydraulic conductivity functions (B and D) for Vinton and Appling soils, respectively. Squares, diamonds, and triangles correspond to Replicates 1 to 3, respectively.

View larger version (38K): [in a new window]   Fig. 4. Observed pressure head (A) and cumulative flux (B) for Appling/Vinton (Rep 3) and Vinton/Appling (Rep 1). Observed (symbols) and predicted (line) pressure head (C and D) and cumulative fluxes (E and F) are shown for same replicates.