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Measurement of Local Soil Water Flux during Field Solute Transport Experiments

^a Dep. of Soil Science, University of Saskatchewan, Saskatoon, SK, Canada
^b Dep. of Renewable Resources, University of Alberta, Edmonton, AB, Canada

View larger version (25K): [in a new window]   Fig. 1. An example of the linear relationship of soil solute storage verus time, at early time, for an application rate of 3.3 cm h-1 and TDR probe (0.2 m) at position 1.5 m during: (a) continuous solute application on soil surface (step input) and (b) flushing experiment. The first 14 points (t = 0 to 1 h) were used in both regressions.

View larger version (32K): [in a new window]   Fig. 2. Measured soil water flux along the transect using transient infiltration, step and flushing experiments for an application rate of approximately 3.3 cm h-1 and a probe length of 0.2 m.

View larger version (27K): [in a new window]   Fig. 3. Relationship between soil water fluxes measured during step increase and flushing solute transport experiments for an application rate of 3.3 cm h-1 for a probe length of (a) 0.2 m and (b) 0.4 m.

View larger version (21K): [in a new window]   Fig. 4. Relationship between fluxes measured during step and flushing solute transport experiments for an application rate of 0.9 cm h-1 and a probe length of 0.2 m.

View larger version (29K): [in a new window]   Fig. 5. Relationship between soil water flux measured during step, flush, and transient infiltration experiments with an application rate of 3.3 cm h-1 and a probe length of (a) 0.2 m and (b) 0.4 m.

View larger version (20K): [in a new window]   Fig. 6. Comparison of measured hydraulic conductivity as a function of soil water content from flushing experiments for the two application rates with K() reported in Si et al. (1999).