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Joint Hydrological–Geophysical Inversion for Soil Structure Identification

Lawrence Berkeley National Lab., Earth Sciences Division, 1 Cyclotron Rd., Mail Stop 90-1116, Berkeley, CA 94720

View larger version (65K): [in this window] [in a new window]   FIG. 1. TWO-DIMENSIONAL (DEPTH AND HORIZONTAL DISTANCE X), spatially structured, random permeability (k) field, position of infiltration pond, location of ground penetrating radar antennas (squares: transmitting; circles: receiving) and position of pilot points (crosses): (a) true field; (b) initial field prior to joint inversion.

View larger version (72K): [in this window] [in a new window]   FIG. 2. SPATIAL DISTRIBUTION OF LIQUID SATURATION (Sliq) after 1 d of water release, locations of neutron probes in boreholes (squares), and ground penetrating radar straight-ray paths used for inversion.

View larger version (46K): [in this window] [in a new window]   FIG. 3. TWO-DIMENSIONAL (DEPTH AND HORIZONTAL DISTANCE X) permeability (k) field estimated by joint inversion: (a) single realization; (b) median from 20 realizations; (c) standard deviation showing estimation uncertainty.