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Preferential Flow and Pedotransfer Functions for Transport Properties in Sandy Kandiudults

J.N. Shawa, L.T. Westb, D.E. Radcliffeb and D.D. Boschc

a Auburn Univ., Dept. of Agronomy and Soils, 202 Funchess Hall, Auburn, AL 36849 USA
b Univ. of GA., Dept. of Crop and Soils, 3111 Miller Plant Sci. Bldg., Athens, GA 30602 USA
c USDA-SE Watershed Laboratory, P.O. Box 946, Tifton, GA, 31794 USA



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Fig. 1 Location of study site near Plains, GA, with subset of sampling locations. Contour intervals (0.5 m) are shown

 


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Fig. 2 Saturated hydraulic conductivity, Ks, with depth for the three pedons. Bars represent standard errors of means

 


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Fig. 3 Cross-sectional area of blue dye staining with depth. Bars represent standard errors of the means

 


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Fig. 4 Patterns of methylene blue dye staining from three cores (15-cm diam) showing undyed (u) and dyed (d) areas. (a) NW Bt1 horizon, (b) NE Bt horizon, (c) SE Bt4 horizon

 


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Fig. 5 Example of breakthrough curves from three horizons

 


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Fig. 6 Beta (ratio of mobile water to the volumetric water content) from the dual-domain nonequilibrium mobile–immobile (MIM) adaption to the CDE with depth for all pedons. Bars represent standard errors of means

 


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Fig. 7 Alpha from the dual-domain nonequilibrium mobile–immobile (MIM) adaption to the convection–dispersion equation with depth for all pedons. Bars represent standard erors of means

 





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