HR: 17:15h
AN: H44C-06    [Abstracts]
TI: Coupled Hydrological/Geophysical Inversion: Theory and Implementation on Laboratory Experiments
AU: * Huang, H
EM: Hai.Huang@inl.gov
AF: Idaho National Laboratory, PO Box 1625, Idaho Falls, ID 83414 United States
AU: Versteeg, R
EM: roelof.versteeg@inl.gov
AF: Idaho National Laboratory, PO Box 1625, Idaho Falls, ID 83414 United States
AB: A fundamental challenge in hydrological modeling is the determination of the values of the hydrological properties in the model domain. Typically, these properties are only known for a small number of locations in the model domain. Hydrological inversion aims at estimating these values from breakthrough curves, and in previous work we have demonstrated the feasibility of this effort. However, such breakthrough curves are typically only known for a limited number of locations, resulting in an underdetermined system. A natural extension of this methodology is the use of geophysical time lapse data. Inversions of time lapse geophysical data provides temporal and spatial changes in electrical conductivity. By mapping these temporal/spatial conductivity changes to moisture content maps and using these maps as inputs to our hydrological inversion we can obtain better estimates of hydrological properties. The success of this approach is predicated on a successful mapping function. However, by coupling the hydrological forward modeling to the geophysical inverse modeling we can iteratively enhance this mapping function until the inverted electrical resistivity field, temporal moisture content distribution and saturated hydraulic conductivity field and hydrological properties are internally consistent. We will discuss the validation of this approach both on synthetic and experimental data obtained in several controlled laboratory experiments.
UR: http://geophysics.inel.gov
DE: 1847 Modeling
DE: 1848 Monitoring networks
DE: 1872 Time series analysis (3270, 4277, 4475)
DE: 1894 Instruments and techniques: modeling
DE: 1895 Instruments and techniques: monitoring
SC: Hydrology [H]
MN: Fall Meeting 2005