Authors / CoAuthors
Evans, T. | Schroder, I. | de Caritat, P.
Abstract
<div>The Curnamona Province and overlying basins (herein referred to as the Broken Hill region) contain many discrete groundwater systems. These include sedimentary aquifers of the Lake Eyre Basin, Eromanga Basin, Darling Basin and Arrowie Basin, as well as fractured rock aquifers of the Adelaide Superbasin and Curnamona Province. However, there is little known about the hydrogeology or hydrogeochemistry of these aquifers in the Broken Hill region. Given the semi-arid climate in this region, understanding these groundwater systems can better support sustainable use of the groundwater for agriculture, mining and potable water supplies.</div><div> </div><div>Aquifer attribution provides a fundamental starting point for any hydrogeological study. We will present recently released hydrogeochemical data for the Broken Hill region, and our subsequent process for assessing and attributing hydrostratigraphy to the samples. </div><div>The Broken Hill Groundwater Geochemistry dataset (BHGG) was recently released in its entirety (Caritat et al. 2022 http://dx.doi.org/10.11636/Record.2022.020). It contains a compilation of archival CRC LEME hydrochemistry data that was collected as part of several projects from 1999 to 2005. This high-quality dataset contains 275 groundwater samples and includes a comprehensive suite of majors, minors, trace elements and stable isotopes (δ34S, δ18O, δ2H, δ13C, 87Sr/86Sr, 208/207/206Pb/204Pb). </div><div> At the time of collection, some key bore metadata (e.g. bore depths, screen and aquifer information) were missing from the original data compilations and these metadata are crucial for any hydrogeological analysis and interpretation. Therefore, as part of the new BHGG data release we have developed a robust and consistent approach to add bore information and aquifer attribution, value-adding to the original BHGG chemical and isotopic data. This workflow utilises a combination of State databases, reports, field notes, drillhole compilations and geological maps, but still relied on local hydrological expertise to make decisions when encountering incomplete or conflicting information (which is reflected by a confidence rating on the attribution). </div><div> The resulting BHGG product has supported re-assessment of the key hydrogeological and geochemical knowledge gaps in each groundwater system. An overview of knowledge gaps and the new sampling program being undertaken will be included in the presentation. </div><div><br></div>This Abstract was submitted/presented to the 2022 Australasian Groundwater Conference 21-23 November (https://agc2022.com.au/)
Product Type
document
eCat Id
147114
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Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords
- ( Project )
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- EFTF – Exploring for the Future
- ( Project )
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- DCD
- ( Project )
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- Darling-Curnamona-Delamerian
- ( Project )
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- Curnamona Geochemistry
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- groundwater
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- aquifer
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- hydrogeochemistry
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- hydrostratigraphy
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- Curnamona Province
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- Broken Hill
- theme.ANZRC Fields of Research.rdf
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- Groundwater hydrologyGeochemistry not elsewhere classified
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- Published_External
Publication Date
2023-06-06T05:50:53
Creation Date
2022-08-05T16:00:00
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completed
Purpose
A conference abstract for presentation at Australasian Groundwater Conference 2022 regarding a workflow for bore and hydrostratigraphic attribution for recently released Broken Hill hydrogeochemistry data. The product can be found on e146393 or http://dx.doi.org/10.11636/Record.2022.020
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geoscientificInformation
Series Information
Australasian Groundwater Conference (AGC) 21-23 November 2022, Perth WA
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<div>Abstract produced by Geoscience Australia staff for submission to the Australasian Groundwater Conference 2022</div>
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[-54.75, -9.2402, 112.92, 159.11]
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