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Tracer vs. Pressure Wave Velocities through Unsaturated Saprolite

^a Warnell School of Forest Resources, The University of Georgia, Athens, GA 30602-2152 USA
^b Jr., Parsons Engineering, Atlanta, GA 30326 USA
^c Geology Department, The University of Georgia, Athens, GA 30602-2501 USA
^d Department of Geographical Sciences, University of Plymouth, Plymouth, UK PL9 8AA

View larger version (18K): [in a new window]   Fig. 1 Hydraulic properties of unsaturated saprolite for four parametric formulations: Brooks–Corey (B–C), van Genuchten–mualem (vG–M), Broadbridge–White (B–W), Galileo number (Ga). Model parameters are provided in Table 4. Standard deviations of four repetitions of saprolite water retention observations is 0.01

View larger version (24K): [in a new window]   Fig. 2 Cumulative normalized Cl- breakthrough curves for unsaturated saprolite at the column surface and selected depths. Curve is normalized by dividing observed cumulative Cl- mass by the total observed Cl- mass. Tracer travel times, velocities, and effective porosities are provided in Table 5

View larger version (46K): [in a new window]   Fig. 3 Soil water pressure heads from tensiometer readings in unsaturated saprolite resulting from periodic irrigation at the column surface

View larger version (35K): [in a new window]   Fig. 4 Soil water pressure heads from tensiometer readings in unsaturated saprolite, Column 3, resulting from periodic irrigation at the column surface

View larger version (31K): [in a new window]   Fig. 5 Observed and hydraulic advection–diffusion equation fit to soil water pressure head changes for unsaturated saprolite, Column 3, resulting from periodic irrigation at the column surface