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Simulation of Large-Scale Field Infiltration Experiments Using a Hierarchy of Models Based on Public, Generic, and Site Data

^a Water Management Consultants, 3025 N. Campbell Ave. #281, Tucson, AZ
^b Department of Hydrology and Water Resources, University of Arizona, Tucson, AZ 85721
^c Department of Soil, Water, and Environmental Science, University of Arizona, Tucson, AZ 85721

View larger version (11K): [in a new window]   Fig. 1. Location of nine deep neutron probe wells within experimental area.

View larger version (104K): [in a new window]   Fig. 2. Local stratigraphy based on soil and neutron data (scale in meters).

View larger version (22K): [in a new window]   Fig. 3. One-dimensional forward simulation of infiltration into uniform soil during Exp. 3 at Borehole 422 using mean hydraulic parameters from ROSETTA.

View larger version (22K): [in a new window]   Fig. 4. One-dimensional forward simulation of infiltration into uniform soil during Exp. 3 at Borehole 422 using mean hydraulic parameters from CARSEL.

View larger version (20K): [in a new window]   Fig. 5. One-dimensional simulation of infiltration into layered soil during Exp. 3 at Borehole 402 using mean hydraulic parameter values from CARSEL at various depths.

View larger version (21K): [in a new window]   Fig. 6. One-dimensional simulation of infiltration in Exp. 3 at Borehole 402 using Bayesian updates of saturated hydraulic conductivity, van Genuchten's and n based on ROSETTA estimates.

View larger version (23K): [in a new window]   Fig. 7. Two-dimensional forward simulation along north–south uniformly layered transect, using mean hydraulic parameter values from CARSEL at various depths.

View larger version (19K): [in a new window]   Fig. 8. One-dimensional simulation of infiltration into layered soil during Exp. 3 in Borehole 402 using inverse estimates of saturated hydraulic conductivity and van Genuchten's and n.

View larger version (23K): [in a new window]   Fig. 9. Two-dimensional simulation of infiltration in Exp. 3 along western north–south transect (Boreholes 402, 422, 442), using inverse estimates of saturated hydraulic conductivity and van Genuchten's and n and assuming uniform soil layers.

View larger version (23K): [in a new window]   Fig. 10. Two-dimensional simulation of infiltration in Exp. 3 along western north–south transect (Boreholes 402, 422, 442), using inverse estimates of saturated hydraulic conductivity and van Genuchten's and n and assuming nonuniform layers.

View larger version (20K): [in a new window]   Fig. 11. Histogram of differences between observed and simulated water contents along western north–south transect (Boreholes 402, 422, 442) following inversion. Nonuniform layers.

View larger version (24K): [in a new window]   Fig. 12. Two-dimensional simulation of Exp. 1 along the north–south transect (Boreholes 402, 422, 442), using layered nonuniform conceptual model and hydraulic parameters obtained from Exp. 3.