Exploring for the Future—Bore positioning survey data release for the Nulla and McBride basalt provinces: Upper Burdekin region, North Queensland
Authors / CoAuthors
This data release contains accurate positional data for groundwater boreholes in terms of horizontal location as well as elevation of the top of casing protectors. Twenty-four boreholes located in the Nulla and McBride basalt provinces have had DGPS survey results compiled and are presented. Using 95% confidence intervals, the horizontal uncertainties are less than 1.2m and vertical uncertainties less than 0.9m. These results are a substantial improvement, particularly on the uncertainty of elevations, and as such allow water levels need to be compared between bores on a comparable datum, to enable a regional hydrogeological understanding. Quantifying the uncertainties in elevation data adds robustness to the analysis of water levels across the region rather than detracting from it.
Australian Government Security ClassificationSystem
Classification - unclassified
Creative Commons Attribution 4.0 International Licence
Access - license
Use - license
To release data on surveying borehole locations including their elevations (by the tops of casing protectors), and the uncertainties of these. This accurate elevation data, including quantified uncertainties, allows water levels to be reported on a common datum, Australian Height Datum. Given water level fluctuations can be on the order of millimetres or centimetres, bore heights with an elevation uncertainty of several metres are insufficient, so more accurate bore elevations are essential for comparing water levels between monitoring bores.
Real-Time Kinematic Differential GPS surveying of boreholes has been conducted in three phases. Processing these results allows positional data to be recorded in both horizontal dimensions as well as the vertical dimension. In addition, the uncertainties of these are quantified. These results are collated and presented in this data release.
Downloads and Links
Download the Record (pdf) [1.4 MB]
Download Appendix B AUSPOS GPS Processing Reports [6.4 MB]
Download Appendix C McCall Consulting Report (pdf) [2.2 MB]
Download Appendix D GPS and AUSPOS input files [257 MB]