Multi-isotope studies investigating recharge and inter-aquifer connectivity in coal seam gas areas (Qld, NSW) and shale gas areas (NT)

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dc.contributor.authorSuckow, Aen_AU
dc.contributor.authorDeslandes, Aen_AU
dc.contributor.authorGerber, Cen_AU
dc.contributor.authorLamontagne, Sen_AU
dc.contributor.authorMallants, Den_AU
dc.contributor.authorDavies, Pen_AU
dc.contributor.authorTaylor, Aen_AU
dc.contributor.authorWilske, Cen_AU
dc.contributor.authorSmith, Sen_AU
dc.contributor.authorRaiber, Men_AU
dc.contributor.authorMeredith, KTen_AU
dc.contributor.authorRachakonda, PKen_AU
dc.contributor.authorLarcher, Aen_AU
dc.contributor.authorWilkes, Pen_AU
dc.contributor.authorPrommer, Hen_AU
dc.contributor.authorSiade, Aen_AU
dc.contributor.authorBarrett, Den_AU
dc.date.accessioned2022-07-21T23:26:06Zen_AU
dc.date.available2022-07-21T23:26:06Zen_AU
dc.date.issued2020-05-15en_AU
dc.date.statistics2022-06-27en_AU
dc.description.abstractLarge sedimentary basins with multiple aquifer systems like the Great Artesian Basin and the Beetaloo Sub-Basin are associated with large time and spatial scales for regional groundwater flow and mixing effects from inter-aquifer exchange. This makes them difficult to study using traditional hydrogeological investigation techniques. In continental onshore Australia, such sedimentary aquifer systems can also be important freshwater resources. These resources have become increasingly stressed because of growing demand and use of groundwater by multiple industries (e.g. stock, irrigation, mining, oil and gas). The social licence to operate for extractive oil and gas industries increasingly requires robust and reliable scientific evidence on the degree to which the target formations are vertically and laterally hydraulically separated from the aquifers supplying fresh water for stock and agricultural use. The complexity of such groundwater interactions can only be interpreted by applying multiple lines of evidence including environmental isotopes, hydrochemistry, hydrogeological and geophysical observations. We present an overview of multi-tracer studies from coal seam gas areas (Queensland and New South Wales) or areas targeted for shale gas development (Northern Territory). The focus was to investigate recharge to surficial karst and deep confined aquifer systems before industrial extraction on time scales of decades up to one million years and aquifer inter-connectivity at the formation scale. A systematic and consistent methodology is applied for the different case study areas aimed at building robust conceptual hydrogeological models that inform groundwater management and groundwater modelling. The tracer studies provided (i) in all areas increased confidence around recharge estimates, (ii) evidence for a dual-porosity flow system in the Hutton Sandstone (Queensland) and (iii) new insights into the connectivity, or lack thereof, of flow systems. © CSIRO 2020en_AU
dc.identifier.citationSuckow, A., Deslandes, A., Gerber, C., Lamontagne, S., Mallants, D., Davies, P., Taylor, A., Wilske, C., Smith, S., Raiber, M., Meredith, K., Rachakonda, P. K., Larcher, A., Wilkes, P., Prommer, H., Siade, A., & Barrett, D. (2020). Multi-isotope studies investigating recharge and inter-aquifer connectivity in coal seam gas areas (Qld, NSW) and shale gas areas (NT). The APPEA Journal, 60(1), 335-347. doi:10.1071/AJ19187en_AU
dc.identifier.issn2206-8996en_AU
dc.identifier.issue1en_AU
dc.identifier.journaltitleThe APPEA Journalen_AU
dc.identifier.pagination335-347en_AU
dc.identifier.urihttps://doi.org/10.1071/AJ19187en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13415en_AU
dc.identifier.volume60en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectAquifersen_AU
dc.subjectGroundwater rechargeen_AU
dc.subjectArtesian basinsen_AU
dc.subjectIsotopesen_AU
dc.subjectTracer techniquesen_AU
dc.subjectCoal seamsen_AU
dc.subjectShale gasen_AU
dc.subjectQueenslanden_AU
dc.subjectNew South Walesen_AU
dc.subjectNorthern Territoryen_AU
dc.subjectAustraliaen_AU
dc.titleMulti-isotope studies investigating recharge and inter-aquifer connectivity in coal seam gas areas (Qld, NSW) and shale gas areas (NT)en_AU
dc.typeJournal Articleen_AU
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