A Resolution Analysis of Two Geophysical Imaging Methods For Characterizing and Monitoring Hydrologic Conditions in the Vadose Zone

D. Alumbaugh, D. LaBreque, J. Brainard and G. Hammond

University of Wisconsin System. Board of Regents.

关键词: Solutes;    Monitoring;    Hydrology;    Geophysical Surveys;    Fluid Flow;   

RP-ID  :  144-LG63
RP-ID  :  FG07-02ER63501
RP-ID  :  888655

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this research project was to analyze the resolution of two geophysical imaging techniques: electrical resistivity tomography (ERT) and cross-borehole ground penetrating radar (XBGPR) for monitoring subsurface flow and transport processes within the vadose zone. This was accomplished through a coupled approach involving very fine-scale unsaturated flow forward modeling, conversion of the resultant flow and solute fields to geophysical property models, forward geophysical modeling using the property model obtained from the last step to obtain synthetic geophysical data, and finally inversion of this synthetic data. These geophysical property models were then compared to those derived from the conversion of the hydrologic forward modeling to provide an understanding of the resolution and limitations of the geophysical techniques.