CRC LEME
Open File Report 171
ABSTRACT
Forward modelling airborne electromagnetic data for the Riverland,
South Australia
Green A, Munday T
PREFACE
The report is a CRCLEME contribution to the South Australian Salinity
Mapping and
Monitoring Project (SA-SMMSP) being conducted under the auspices
of the National Action Plan for Salinity and Water Quality. It summarises
some scoping work undertaken ahead of the call for tenders that
concerned the acquisition of airborne geophysical data, and represented
an effort to be more considered in their application to natural
resource management issues.
Following discussion with South Australian colleagues, concerning
issues of relevance to salinity management in the Riverland region
of South Australia, we established a scoping study to determine
whether the Blanchetown Clay might be a resolvable target for current
airborne electromagnetic systems, and if so what system might be
most appropriate for its detection. Of particular interest was whether
recent advances in EM system technology, improvements in their noise
characteristics and data processing and display would enable the
reliable mapping of these clay units including their thickness.
For modelling purposes, a representative geological model was defined
for the Blanchetown Clay along with a corresponding schematic geo-electric
model.
This report captures the outcomes of a set of milestone reports
submitted to the SA Technical Advisory Committee as part of early
scoping studies conducted by CRCLEME on behalf of the SA-SMMSP.
This work indicated that high resolution frequency domain helicopter
EM data rather than fixed-wing time domain EM systems were most
suited to the detection of the clay at a resolution appropriate
for planning purposes
T.J. Munday
Riverland SA-SMMSP Sub-Project Leader
|
