HR: 11:55h
AN: H21F-07    [PDF]
TI: Estimation of Flow Parameters Using Crosshole GPR Travel Times and Hydrological Data Collected During Transient Flow Experiments
AU: * Kowalsky, M B
AF: Civil and Environmental Engineering, University of California, 435 Davis Hall, Berkeley, CA 94720 United States
AU: * Kowalsky, M B
AF: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-1116, Berkeley, CA 94720 United States
AU: Rubin, Y
AF: Civil and Environmental Engineering, University of California, 435 Davis Hall, Berkeley, CA 94720 United States
AU: Peterson, J
AF: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-1116, Berkeley, CA 94720 United States
AU: Finsterle, S
AF: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-1116, Berkeley, CA 94720 United States
AB: An approach which employs concepts from the pilot point method is used for estimating flow parameter distributions in the vadose zone with crosshole ground-penetrating radar (GPR) travel times along with hydrological data (e.g., point measurements of permeability, and water saturation values inferred from neutron probe data) collected during transient flow experiments. The methodology presented allows for estimation of the non-uniform permeability field (as well as porosity and additional uniform parameters describing the relative permeability and capillary pressure functions) and provides measures of parameter uncertainty. Various aspects of the approach, such as data collection configurations, are examined through a 2D synthetic model. In addition, inversion of data collected during an infiltration test at the Hanford field site allows for the strengths and limitations of the approach in a 3D setting to be explored.
DE: 0600 ELECTROMAGNETICS
DE: 1866 Soil moisture
DE: 1869 Stochastic processes
DE: 1875 Unsaturated zone
DE: 3260 Inverse theory
SC: Hydrology [H]
MN: 2003 Fall Meeting