Search CRC LEME :

powered by FreeFind

Publication Policy

Open File Report Series

OFRS Index


Regolith Maps

Annual Reports

Articles & Papers


Minerals Briefs

"Focus on Salt"

Other LEME Reports

Order Form

Open File Report 180

Combing Geology and Geophysics to Develop a Hydrogeologic Framework for salt interception in the Loxton Sands Aquifer, Central Murray Basin, Australia

T.J. Munday, A.J. Hill, T. Wilson, B. Hopkins, A.L. Telfer,
G.J. White and A.A. Green

CSIRO Exploration and Mining Report P2004/86


Salt interception schemes (SIS) have been developed to manage high salt loads and to improve the health of the River Murray, both in the Riverland (South Australia) and Sunraysia (Victoria/NSW) areas. Currently SIS at Loxton and Bookpurnong are being developed, both incorporating borefields in the Loxton Sands aquifer to intercept saline groundwater flux from groundwater mounds that have formed beneath irrigated areas. At Bookpurnong a sedimentological model that defines lateral and vertical changes in facies associated with the main aquifer systems relevant to the IS, has been refined from a detailed interpretation of borehole geology, ground and airborne geophysics, combined with the analysis of sediments for the Loxton Sands and underlying Bookpurnong This is an important precursor in the development of a predictive model of groundwater hydraulic properties using available hydrogeological and geophysical data. Definition of the sedimentological characteristics and depositional setting of the principal aquifer system – the Loxton Sands, has been critical. Relatively narrow zones of high transmissivity, characterized by slightly reduced electrical conductivity response at the watertable, are the target for ground TEM geophysical traverses. These zones have been identified as elements of a Basin-wide beach-barrier strandline sequence that developed in the Pliocene. Results from the constrained inversion of helicopter EM data have helped to better define the geometry of this sedimentary system and together with a hydrogeological interpretation have contributed to a more informed approach to the design, development and potential performance of the Loxton Sands SIS borefields.

Keywords: Salt Interception Scheme, geophysics, Loxton Parilla Sands, aquifers, groundwater



Cooperative Research Centres Australia

About Us | News & Events | Research
Publications | Education | Staff Only | Links

Contact Us | Disclaimer | Sitemap
© CRC LEME 2004

CRC LEME is established and supported under the Australian Government's Cooperative Research Centres Program. The CRC Program is an Australian Government initiative which brings together research groups with common interests.

CRC LEME Core Parties