High Frequency Electromagnetic Impedance Imaging for Vadose Zone and Groundwater Characterization

Newman, Greory A. ; Alumbaugh, David L. ; Hoversten, Michael ; Nichols, Edward

Electromagnetic Instruments, Inc (United States)

关键词: Geologic Structures;    Ground Water;    Data Acquisition;    Site Characterization;    11 Nuclear Fuel Cycle And Fuel Materials;   

DOI  :  10.2172/811869
RP-ID  :  DOE/ER/15021
RP-ID  :  FG07-99ER15021
RP-ID  :  811869

美国|英语

来源: UNT Digital Library

【 摘 要 】

A geophysical experiment is described for characterizing the clastic dike systems, which are ubiquitous within the vadose zone at the Hanford Nuclear Reservation. because the dikes possess a significant electrical contrast from the insulating host medium, we have applied controlled source audio magnetotelluric (CSAMT) measurements to map their geometric extent and to further clarify if the dike complex acts as a conduit for contaminant transport within the vadose zone. Because of cost and weak natural field signal levels, we employed controlled field sourcing using the STRATGEM acquisition system. Use of artificial fields often goes with the assumption that the data required in the far-field of the transmitter.