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Goyder FLOWS Stage-2 has worked towards improving broad knowledge about the location and interaction between groundwater resources in the northern part of the Eyre Peninsula area. This area is a priority area that was identified by the mining exploration industry for mineral exploration and potential mine developments.
Work undertaken in G-FLOWS St...
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A multi-method geophysical survey, including helicopter-borne electromagnetics (HEM), transient electromagnetics (TEM), and magnetic resonance sounding (MRS), was conducted to investigate a freshwater lens on the North Sea island of Langeoog, Germany. The HEM survey covers the entire island and gives an overview of the extent of three freshwater le...
Shallow sandy aquifer of Kalpitiya Peninsula is at a risk due to over-abstraction of groundwater and over-application of fertilizers. Therefore, Kalpitiya Peninsula was selected as the study area to identify the hydrogeological setup and effect of intensive agricultural practices on groundwater. Initially, 26 water samples from shallow wells were a...
The aim of the application of VLF surveys in hydrogeology is the contribution to the decision making as concern the construction of a well. Geophysical survey by the application of VLF method must respond to the questions (a) if the construction of a well should be proposed or not, and if the answer is yes then (b) where exactly must be located. Th...
Citations
... Groundwater in remote arid areas of South Australia is often the only available water resource to support the livelihood of communities as well as to support opportunities for future water-dependent industries/enterprises. The third stage of the Goyder Institute's Facilitating Long-term Outback Water Solutions (G-FLOWS) research program followed on from the successful first two stages (Gilfedder & Munday 2013, Gilfedder et al. 2015 and aimed to help reduce significant risks faced when considering water resource development proposals for these areas, allowing for more informed decision-making and prioritisation for more targeted drilling to secure water supplies. ...
The G-FLOWS Stage-3 project has developed and applied an integrated approach to the measurement, analysis, and modelling of geophysical, geochemical and hydrogeological techniques, which aim to help more efficiently and effectively target groundwater resources in a remote part of arid Australia.
The project has focused on groundwater in the Anangu Pitjantjatjara Yankunytjatjara (APY) Lands, which is a remote arid area in northwest South Australia. It investigated the role that large buried palaeovalley systems can play as potential groundwater resources for community and enterprises. G-FLOWS Stage-3 involved a collaboration between CSIRO, Flinders University and the South Australian Department for Environment and Water.
... We refer to work carried out in South Australia to illustrate the importance of reprocessing of AEM data, the use of conductivity derived models and in particular the application of inversion as a process for data assessment Gilfedder et al., 2015). Work from these examples demonstrates the value of reprocessing legacy data acquired from a suite of AEM systems, and the use of the derived models to map geological structures in the near-surface. ...
Airborne electromagnetics (AEM) is an important exploration method for revealing geological insights into the subsurface. AEM has proven to be particularly useful for mapping geological structures and has played a significant role in places such as the central parts of Africa, South America and Australia, where approximately 80% of the landscape is covered by regolith and sedimentary basins, the outcrop is rare and mineral deposits are hidden beneath barren cover. The method's non-invasive nature and its extensive ground coverage make it a particularly powerful tool at the early stages of green-field exploration. Airborne electromagnetic surveys commissioned by exploration companies for mineral exploration purposes are mostly perceived as 'anomaly detectors'. For further interpretation it is essential to comprehend the main local geological and survey-specific factors that influence the electromagnetic response. The aim of any given observation is to understand the procedures and assumptions used to derive models of conductivity and depth from the measured data, and then develop processes to infer geology, lithology and other characteristics of the subsurface from the models which honour the data. Geophysicists assessing AEM models are often faced with the conundrum of determining how geologically sensible a proposed model is and how it compares to many other possible solutions. One way is to explore thousands of plausible models that fit the data through stochastic processes. The statistical analysis permits quantification of the degree of uncertainty and a probable distribution of conductivities at depth. To make the information translatable to other disciplines, it is necessary to process AEM measurements and integrate them with ancillary information. The combination of data integration and AEM's extensive area coverage enables transfer of local geological understanding to a broader region. Previous work has demonstrated there also is great value in reprocessing legacy data that is often abandoned.
