Description: Georgina Basin boundary was extracted from the Australian Geological Provinces (Raymond et al. 2018).Raymond OL, Totterdell JM, Woods MA, Stewart AJ (2018). Australian Geological Provinces 2018.01 edition. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/116823
Description: South Nicholson Basin boundary was extracted from the Australian Geological Provinces (Raymond et al. 2018).Raymond OL, Totterdell JM, Woods MA, Stewart AJ (2018). Australian Geological Provinces 2018.01 edition. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/116823
Description: South Nicholson - Georgina Basin boundary was created from the Australian Geological Provinces (Raymond et al. 2018).Raymond OL, Totterdell JM, Woods MA, Stewart AJ (2018). Australian Geological Provinces 2018.01 edition. Geoscience Australia, Canberra. https://dx.doi.org/10.26186/116823
Description: All bores in the NT and QLD groundwater database within the SNG region were investigated and, where possible, assigned to broader hydrogeological groups and individual geological units. Each attribution was assigned a confidence value based on the number of lines of evidence used in the determination. Where available, water level information was also included.
Description: All bores in the NT and QLD groundwater database within the SNG region were investigated and, where possible, assigned to broader hydrogeological groups and individual geological units. Each attribution was assigned a confidence value based on the number of lines of evidence used in the determination. Where available, water level information was also included.
Description: All bores in the NT and QLD groundwater database within the SNG region were investigated and, where possible, assigned to broader hydrogeological groups and individual geological units. Each attribution was assigned a confidence value based on the number of lines of evidence used in the determination. Where available, water level information was also included.
Description: Hydrochemistry data for groundwater bores and springs were collated from various sources in the SNG region including DEPWS (2023), Geoscience Australia (2024), Gray and Bardwell (2016a, 2016b), McGrath et al. (2021), NT Government (2022), QDRDMW (2023), Schroder et al. (2020) and Trihey and Northey (2021). Given the large variation in temporal range of the data (1948–2022), the most recently acquired data for each bore was used as basis for this assessment. Records with charge balance errors of ≤10% for selected major and minor ions (sodium, calcium, magnesium, potassium, iron, strontium, chloride, bicarbonate, sulfate, nitrate, fluoride, bromide, iodide, and silica) were included for this hydrochemical assessment, totalling 2,154 measurements.A subset of bores have been assigned a source aquifer based on information in existing databases by applying a consistent attribution method (Appendix C in Dixon-Jain et al. 2024).DEPWS (Department of Environment, Parks and Water Security) (2023) Northern Territory bore locations, water quality and groundwater levels [data set], https://data.nt.gov.au/dataset/nt-bore-locations-water-quality-and-groundwater-levelsDixon-Jain P, Bishop C, Lester JE, Orlov C, McPherson A, Pho G, Flower C, Kilgour P, Lawson S, Vizy J and Lewis SJ (2024) Hydrogeology and groundwater systems of the South Nicholson and Georgina basins, Northern Territory and Queensland. Record 2024/37, Geoscience Australia, Canberra. https://dx.doi.org/10.26186/149730Geoscience Australia (2024) Hydrochemistry [data set], Geoscience Australia, Canberra. https://portal.ga.gov.au/metadata/geochemistry/hydrochemistry/all-hydrochemistry-analyses/a2edc729-7cbd-42dd-a169-0a55e562b366, https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/147298 [web service]Gray, D and Bardwell, N (2016a) Hydrogeochemistry of Northern Territory: Data Release v1 [data set], CSIRO. Australia, https://doi.org/10.4225/08/575A456B53264.Gray, D and Bardwell, N (2016b) Hydrogeochemistry of Northern Territory: Data Release v2 [data set], CSIRO, Australia, https://doi.org/10.4225/08/5987d4ba86ff7.McGrath-Cohen, E.S.B., Trihey, J.M., Northey, J.E. 2021. Exploring for the Future — Groundwater hydrochemistry data release: Ti Tree project, Northern Territory. Record 2020/044. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2020.044 NT Government (2022) Strategic Regional Environmental Baseline Assessment (SREBA) Beetaloo groundwater quality database [data set], https://srebadata.nt.gov.au/view/ntg-sda-000000051QDRDMW (Queensland Department of Regional Development, Manufacturing and Water) (2023) Groundwater database – Queensland, https://www.data.qld.gov.au/dataset/groundwater-database-queensland, Schroder IF, de Caritat P, Wallace L, Trihey JM, Boreham C, Tobin J, English PE, Sohn J, Palatty P, Coghlan RA, Flower C, Maher P, Main PT, Thorose M, Long I, Byass J and Jinadasa N (2020) Northern Australia Hydrogeochemical Survey: Final Data Release and Hydrogeochemical Atlas for EFTF, Geoscience Australia, Canberra, http://dx.doi.org/10.11636/Record.2020.015Trihey, J., Northey, J.E. 2021. Exploring for the Future — Groundwater hydrochemistry data release: Western Davenport project, Northern Territory. Record 2020/048. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2020.048
Description: Hydrochemistry data for groundwater bores and springs were collated from various sources in the SNG region including DEPWS (2023), Geoscience Australia (2024), Gray and Bardwell (2016a, 2016b), McGrath et al. (2021), NT Government (2022), QDRDMW (2023), Schroder et al. (2020) and Trihey and Northey (2021). Given the large variation in temporal range of the data (1948–2022), the most recently acquired data for each bore was used as basis for this assessment. Records with charge balance errors of ≤10% for selected major and minor ions (sodium, calcium, magnesium, potassium, iron, strontium, chloride, bicarbonate, sulfate, nitrate, fluoride, bromide, iodide, and silica) were included for this hydrochemical assessment, totalling 2,154 measurements.A subset of bores have been assigned a source aquifer based on information in existing databases by applying a consistent attribution method (Appendix C in Dixon-Jain et al. 2024).DEPWS (Department of Environment, Parks and Water Security) (2023) Northern Territory bore locations, water quality and groundwater levels [data set], https://data.nt.gov.au/dataset/nt-bore-locations-water-quality-and-groundwater-levelsDixon-Jain P, Bishop C, Lester JE, Orlov C, McPherson A, Pho G, Flower C, Kilgour P, Lawson S, Vizy J and Lewis SJ (2024) Hydrogeology and groundwater systems of the South Nicholson and Georgina basins, Northern Territory and Queensland. Record 2024/37, Geoscience Australia, Canberra. https://dx.doi.org/10.26186/149730Geoscience Australia (2024) Hydrochemistry [data set], Geoscience Australia, Canberra. https://portal.ga.gov.au/metadata/geochemistry/hydrochemistry/all-hydrochemistry-analyses/a2edc729-7cbd-42dd-a169-0a55e562b366, https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/147298 [web service]Gray, D and Bardwell, N (2016a) Hydrogeochemistry of Northern Territory: Data Release v1 [data set], CSIRO. Australia, https://doi.org/10.4225/08/575A456B53264.Gray, D and Bardwell, N (2016b) Hydrogeochemistry of Northern Territory: Data Release v2 [data set], CSIRO, Australia, https://doi.org/10.4225/08/5987d4ba86ff7.McGrath-Cohen, E.S.B., Trihey, J.M., Northey, J.E. 2021. Exploring for the Future — Groundwater hydrochemistry data release: Ti Tree project, Northern Territory. Record 2020/044. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2020.044 NT Government (2022) Strategic Regional Environmental Baseline Assessment (SREBA) Beetaloo groundwater quality database [data set], https://srebadata.nt.gov.au/view/ntg-sda-000000051QDRDMW (Queensland Department of Regional Development, Manufacturing and Water) (2023) Groundwater database – Queensland, https://www.data.qld.gov.au/dataset/groundwater-database-queensland, Schroder IF, de Caritat P, Wallace L, Trihey JM, Boreham C, Tobin J, English PE, Sohn J, Palatty P, Coghlan RA, Flower C, Maher P, Main PT, Thorose M, Long I, Byass J and Jinadasa N (2020) Northern Australia Hydrogeochemical Survey: Final Data Release and Hydrogeochemical Atlas for EFTF, Geoscience Australia, Canberra, http://dx.doi.org/10.11636/Record.2020.015Trihey, J., Northey, J.E. 2021. Exploring for the Future — Groundwater hydrochemistry data release: Western Davenport project, Northern Territory. Record 2020/048. Geoscience Australia, Canberra. http://dx.doi.org/10.11636/Record.2020.048
Description: The regional water level contours were derived from the watertable trend surface which was constructed from groundwater elevations for a subset of bores attributed to the Barkly, Narpa, Cockroach, and Toko group aquifers of the Georgina Basin. At the basin-scale, these aquifers are assumed to be hydraulically connected due to the absence of regional aquitards or other geological structures. These aquifers, commonly referred to in this report as the ‘regionally unconfined aquifers’, are the most common aquifers for groundwater supplies over most of the SNG region (except for the far southern parts where the Georgina Basin is overlain by younger Mesozoic aquifers of the Great Artesian Basin).
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Description: The groundwater divides dataset was derived from the regional watertable surface, which was created using groundwater elevations from a subset of bores attributed to the Barkly, Narpa, Cockroach and Toko group aquifers of the Georgina Basin. At the basin-scale, these aquifers are assumed to be hydraulically connected due to the absence of regional aquitards or other geological structures. These aquifers, commonly referred to in this report as the ‘regionally unconfined aquifers’, are the most common aquifers for groundwater supplies over most of the SNG region (except for the far southern parts where the Georgina Basin is overlain by younger Mesozoic aquifers of the Great Artesian Basin).The north-east trending groundwater divide separates the regional unconfined aquifers of the Georgina Basin into northern and southern groundwater flow systems. The location of the groundwater divide has greater uncertainty towards the sourthern extent due to less bore data near the basin boundary. This groundwater divide is in the vicinity of a prominent geological basement structure known as the Alexandria-Wonarah High.
Description: The flow line paths dataset was derived from the regional watertable surface, which was created using groundwater elevations from a subset of bores attributed to the Barkly, Narpa, Cockroach and Toko group aquifers of the Georgina Basin. At the basin-scale, these aquifers are assumed to be hydraulically connected due to the absence of regional aquitards or other geological structures. These aquifers, commonly referred to in this report as the ‘regionally unconfined aquifers’, are the most common aquifers for groundwater supplies over most of the SNG region (except for the far southern parts where the Georgina Basin is overlain by younger Mesozoic aquifers of the Great Artesian Basin).From analysis of the mapping, three regional groundwater flow systems were identified:1. Roper River flow system2. Lawn Hill Creek flow system3. Southern Georgina Basin flow system.
Description: The flow line paths dataset was derived from the regional watertable surface, which was created using groundwater elevations from a subset of bores attributed to the Barkly, Narpa, Cockroach and Toko group aquifers of the Georgina Basin. At the basin-scale, these aquifers are assumed to be hydraulically connected due to the absence of regional aquitards or other geological structures. These aquifers, commonly referred to in this report as the ‘regionally unconfined aquifers’, are the most common aquifers for groundwater supplies over most of the SNG region (except for the far southern parts where the Georgina Basin is overlain by younger Mesozoic aquifers of the Great Artesian Basin).From analysis of the mapping, three regional groundwater flow systems were identified:1. Roper River flow system2. Lawn Hill Creek flow system3. Southern Georgina Basin flow system.
Description: The regional watertable trend surface was constructed from groundwater elevations for a subset of bores attributed to the Barkly, Narpa, Cockroach, and Toko group aquifers of the Georgina Basin. At the basin-scale, these aquifers are assumed to be hydraulically connected due to the absence of regional aquitards or other geological structures. These aquifers, commonly referred to in this report as the ‘regionally unconfined aquifers’, are the most common aquifers for groundwater supplies over most of the SNG region (except for the far southern parts where the Georgina Basin is overlain by younger Mesozoic aquifers of the Great Artesian Basin).