A Hydrologic-Geophysical Method for Characterizing Flow and Transport Processes within the Vadose Zone

Alumbaugh, David L. ; Brainard, James R.

University of Wisconsin at Madison, Madison, WI

关键词: 58 Geosciences;    Monitoring;    Simulation;    Transport;    Radar;   

DOI  :  10.2172/838688
RP-ID  :  EMSP-86890--2004
RP-ID  :  FG07-02ER63501
RP-ID  :  838688

美国|英语

来源: UNT Digital Library

【 摘 要 】

The research objective of this project is to analyze the resolution of two different geophysical imaging techniques (electrical resistivity tomography and cross-borehole ground penetrating radar) for monitoring subsurface flow and transport processes within the vadose zone. This is being accomplished through a coupled approach involving large scale unsaturated flow modeling, petrophysical conversion of the resulting hydrologic properties to a geophysical property model and generation of synthetic geophysical data, followed by the inversion of the synthetic geophysical data. The resolution, benefits, and limitations of the geophysical techniques will then be ascertained through analysis and comparison of the images to the original hydrologic model. In addition, increasing levels of complexity will be added to the models as the project progresses through the addition of heterogeneity in the original hydrologic property model, and through uncertainty in the petrophysical relationship that couples the geophysical model to the hydrologic simulation.