Groundwater recharge at the eastern intake beds of the Great Artesian Basin using multi-isotope studies

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dc.contributor.authorSucknow, Aen_AU
dc.contributor.authorDeslandes, Aen_AU
dc.contributor.authorGerber, Cen_AU
dc.contributor.authorTaylor, Aen_AU
dc.contributor.authorRaiber, Men_AU
dc.contributor.authorBarrett, Den_AU
dc.contributor.authorMeredith, KTen_AU
dc.date.accessioned2021-08-30T06:38:14Zen_AU
dc.date.available2021-08-30T06:38:14Zen_AU
dc.date.issued2019-11-25en_AU
dc.date.statistics2021-08-16en_AU
dc.description.abstractObjectives: Large sedimentary basins with multiple aquifer systems, such as the Great Artesian Basin (GAB) in Australia, are difficult to study because of the very large time scales associated with groundwater flow. The GAB is the world’s largest and deepest artesian groundwater basin and has become increasingly stressed due to demand from multiple competing industries (agriculture, oil, coal and gas). Quantifying groundwater recharge is crucial for understanding the water balance for this economically and culturally important multi-aquifer system. The complexity of the GAB can only be dealt with by applying multiple lines of evidence including environmental isotopes, supported by hydrochemical, sedimentological, and geophysical observations. Design and Methodology: Three studies on the recharge areas of the GAB investigated recharge to the Hutton Sandstone and the Precipice Sandstone (QLD) and the Pilliga Sandstone (NSW). Multiple environmental tracers (major ion chemistry, 18O, 2H, 3H, 13C, 14C, 36Cl, 87Sr/86Sr, 85Kr, 81Kr, noble gases) were measured. Recharge rates were derived from tracer concentration profiles and aquifer cross-sections with porosity derived from previous studies. Conclusions: Tracer results in the Precipice Sandstone are consistent with pumping test data and re-injection of coal seam gas produced water, suggesting high hydraulic conductivities. They provided the first estimate of average long-term annual recharge to this deep confined aquifer, which is of a similar order of magnitude as today’s industrial re-injection of CSG water. © The Authorsen_AU
dc.identifier.citationSucknow, A., Deslandes, A., Gerber, C., Taylor, A., Raiber, M, Barrett, D., & Meredith, K. (2019). Groundwater recharge at the eastern intake beds of the Great Artesian Basin using multi-isotope studies. Paper presented to the Australasian Groundwater Conference, "Groundwater in a Changing World", 24 - 27 November 2019, Brisbane Convention and Exhibition Centre, Queensland. Retrieved from: http://www.groundwater.com.au/documents/agc2019-book-of-abstracts-updated.pdfen_AU
dc.identifier.conferenceenddate27 November 2019en_AU
dc.identifier.conferencenameAustralasian Groundwater Conference, 'Groundwater in a Changing World'en_AU
dc.identifier.conferenceplaceBrisbane, Queenslanden_AU
dc.identifier.conferencestartdate24 November 2019en_AU
dc.identifier.isbn978-1-925562-35-4en_AU
dc.identifier.urihttp://www.groundwater.com.au/documents/agc2019-book-of-abstracts-updated.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11552en_AU
dc.language.isoenen_AU
dc.publisherNational Centre for Groundwater Research And Training, & Australian Chapter International Association Of Hydrogeologistsen_AU
dc.subjectSedimentary basinsen_AU
dc.subjectAquifersen_AU
dc.subjectAustraliaen_AU
dc.subjectGround wateren_AU
dc.subjectArtesian basinsen_AU
dc.subjectIndustryen_AU
dc.subjectAgricultureen_AU
dc.subjectQueenslanden_AU
dc.subjectNew South Walesen_AU
dc.subjectTracer techniquesen_AU
dc.subjectSandstonesen_AU
dc.titleGroundwater recharge at the eastern intake beds of the Great Artesian Basin using multi-isotope studiesen_AU
dc.typeConference Abstracten_AU
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