Geophysical surveys at the Ginninderra controlled release facility  

Authors / CoAuthors

Feitz, A.J.

Abstract

As part of the controlled release experiments at the Ginninderra test site, geophysical surveys have been acquired using electromagnetic techniques at a range of frequencies. The primary objective was to assess whether these could provide insight into the soil structure at the site, give guidance as to where to monitor for leakage, and provide additional information that may explain the observed sub-surface and surface CO2 migration behavior. A secondary objective was to assess whether CO2 leaks could be located based on secondary impacts such as drying of the soil profile. Ground penetrating radar surveys were taken during the second release experiment (October - December 2012). Different frequency shielded antennas were trialled in order to optimize the signal. Two surveys were conducted: one baseline survey prior to CO2 release and another during the release experiment. The GPR results show a reduction in range and clear reflections to the west indicating that clay was present. To the east we see clearer reflections from sand layers and the water table. These observations corresponded with larger scale sub-surface soil features determined from EM31 and EM38 electromagnetic surveys. Application of these geophysical surveys for CO2 leak detection and monitoring design are discussed. Paper for CO2CRC Research Symposium 2013

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nonGeographicDataset

eCat Id

78517

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Keywords

• External PublicationConference Paper

• AU-ACT

Australian and New Zealand Standard Research Classification (ANZSRC)

• Environmental Sciences

• Published_Internal

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2013-01-01T00:00:00

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Australian Government Security ClassificationSystem    

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asNeeded

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environment

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GA-CO2CRC Ginninderra controlled release facility

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