Frequency and/or Time Domain HEM Systems for Defining Floodplain Processes Linked to the Salinisation along the Murray River?

Tim Munday; Andrew Fitzpatrick; James Reid; Volmer Berens; Daniel Sattel

doi:10.1071/ASEG2007ab095

ISSN: 2202-0586
E-ISSN:

oa Frequency and/or Time Domain HEM Systems for Defining Floodplain Processes Linked to the Salinisation along the Murray River?
Authors Tim Munday^a, Andrew Fitzpatrick^b, James Reid^c, Volmer Berens^d and Daniel Sattel^e
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^a CSIRO CSIRO, , Bentley, , WA, , [email protected] ^b CSIRO CSIRO, , Bentley, , WA, , [email protected] ^c GeoForce Pty Ltd, Malaga, , WA, [email protected] ^d DWLBC, Adelaide, SA, [email protected] ^e EM Solutions, Golden, CO, , USA, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2007, Issue ASEG2007 - 19th Geophysical Conference, Dec 2007, p. 1 - 5
DOI: https://doi.org/10.1071/ASEG2007ab095
- Published online: 01 Dec 2007

Abstract

Summary

Geophysical, particularly electrical, methods have the potential to provide detailed spatio-temporal information on the distribution of salinity in soils and groundwater that characterise the floodplains of the Murray River in southeastern Australia, thereby assisting our understanding of floodplain processes. This knowledge can help manage the ecology of these settings, particularly in a time of severe drought when floodplain salinisation, vegetation dieback or health decline is a growing problem.

In this paper we examine the relative merits of high resolution helicopter EM technologies for elucidating floodplain processes. Specifically we consider the relative performance of the RESOLVE frequency domain helicopter EM (FDHEM) and the SkyTEM time domain helicopter EM (TDHEM) systems for defining variations in near surface conductivity and sediment salt load across the Bookpurnong Floodplain in the Riverland of South Australia. Results from coincident surveys are reviewed as are strategies for the inversion of these data. Data are examined against available borehole information including sediment chloride content and groundwater conductivity.

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2007-12-01

2026-01-23

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References

Auken, E., Christiansen, A. V., Jacobsen, B. H., Foged, N., and Sorensen, K. I.., 2005, Piecewise 1-D laterally constrained inversion of resistivity data: Geophysical Prospecting, 53, 497-506.
Constable, S., Parker, R. and Constable, C., 1987. Occam’s inversion: A practical algorithm for generating smooth models from electromagnetic sounding data: Geophysics, 52, 289– 300.
MacInnes, S. and Raymond, M., 2001. STEMINV Documentation – Smooth Model TEM Inversion, V.3.00, Zonge Engineering and Research Organization.
Macnae, J.C., King, A., Stolz, N., Osmakoff, A. and Blaha, A., 1998. Fast AEM data processing and inversion. Expl. Geophys., 29, 163-169.
Munday, T.J., Fitzpatrick, A., Doble, R., Berens, V., Hatch, M., and Cahill, K., 2004. The combined use of air, ground, and ‘in river” electromagnetics in defining spatial processes of salinisation across ecologically important floodplain areas – Lower River Murray, SA. In: R.W. Fitzpatrick and P. Shand, eds. Regolith 2006: CRCLEME, WA, 249-255
Sattel, D., 2005. Inverting airborne electromagnetic (AEM) data with Zohdy’s method, Geophysics, 70(4), G77-G85
Sørensen, K. I. and Auken, E., 2004. SkyTEM - A new high resolution helicopter transient electromagnetic system: Exploration Geophysics, 35, 191-199.
White, M.G., Berens, V., Souter, N.J., Holland, K.L., McEwan, K.L. and Jolly, I.D., 2006. Vegetation and groundwater interactions on the Bookpurnong floodplain, South Australia, Proceedings 10th Murray-Darling Basin Groundwater Workshop: Sept 2006, Canberra, ACT. 7pp

/content/journals/10.1071/ASEG2007ab095

Article Type: Research Article

Keyword(s): Helicopter EM; inversion; Murray River; RESOLVE; salinity; SkyTEM

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oa Frequency and/or Time Domain HEM Systems for Defining Floodplain Processes Linked to the Salinisation along the Murray River?

Abstract

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