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Estimating Soil Hydraulic Properties During Constant Flux Infiltration

Inverse Procedures

Soil Science Dep., Univ. of Saskatchewan, Saskatoon, SK, Canada S7N 5A8

View larger version (15K): [in a new window]   Fig. 1 Delineation of soil water storage curve into different regions (phases): Phase 1 (water storage increases linearly with time); Phase 2 (water storage breakthrough phase); and Phase 3 (steady-state flow phase)

View larger version (16K): [in a new window]   Fig. 2 Calculated soil water storage vs time for error-free measurements (solid curve) and measurements with error (standard deviation, = 0.0026 m) (dashed line)

View larger version (20K): [in a new window]   Fig. 3 Sensitivity of water storage W with respect to (a) Ks, (b) C, and (c) to the change of relative application rate R/Ks

View larger version (86K): [in a new window]   Fig. 4 Contours of S for error-free water storage data as a function of (a) Ks and , (b) Ks and C, and (c) and C

View larger version (79K): [in a new window]   Fig. 5 Contours of S for water storage data contaminated by an error of = 0.0026 m as a function of (a) Ks and , (b) Ks and C, and (c) and C

View larger version (70K): [in a new window]   Fig. 6 Contours of S with an additional measurement for error-free water storage data as a function of (a) Ks and , (b) Ks and C, and (c) and C

View larger version (79K): [in a new window]   Fig. 7 Contours of S with an additional measurement for water storage data with an error of = 0.0026 m as a function of (a) Ks and , (b) Ks and C, and (c) and C

View larger version (16K): [in a new window]   Fig. 8 Measured and predicted water storage vs. time (L = 0.2 m; R = 9.1 x 10-6 m s-1)

View larger version (8K): [in a new window]   Fig. 9