Abstract

Water table elevation of the Great Artesian Basin. Data is available as contours (Shapefile) and elevation grids (ESRI grid and ESRI ASCII grid) Height is in metres above sea level (AHD). Cell resolution is 1000m. Contours and elevations were produced for the Great Artesian Basin Water Resource Assessment and used in watertable maps in: 1. Chapter 6 of Ransley TR and Smerdon BD (eds) (2012) Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia. 2. Regional watertable section of Smerdon BD, Welsh WD and Ransley TR (eds) (2012) Water resource assessment for the Carpentaria region. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia, plus Figure 10 in the associated summary report. 3. Regional watertable section of Smerdon BD and Ransley TR (eds) (2012) Water resource assessment for the Central Eromanga region. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia, plus Figure 13 in the associated summary report. 4. Regional watertable section of Smerdon BD and Ransley TR (eds) (2012) Water resource assessment for the Surat region. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia, plus Figure 14 in the associated summary report. 5. Regional watertable section of Smerdon BD, Welsh WD and Ransley TR (eds) (2012) Water resource assessment for the Western Eromanga region. A report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia, plus Figure 12 in the associated summary report. This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 75830. METHODS (continued from Lineage field): Contours were hand drawn from point water level data. Groundwater water levels along rivers with high EVI values were assumed to be 10m below ground. This information was used to interpret groundwater level contours where borehole water level data was absent. In areas of sparse data coverage the 3 second DEM was used to constrain contours below ground level. SA water levels were corrected for density effects due to salinity (in excess of 100,000 mg/L TDS in some bores in the Eyre Basin) but all others were uncorrected because salinity data were not available. Density corrections for the watertable are not deemed to be an issue outside of the SA portion of the GAB. Remote sensing studies of Enhanced Vegetation Index (EVI) were also used in the interpretation to provide water level information along certain rivers (refer to data set "Watercourses used to calculate riparian evapotranspiration loss from the GAB") where there were no boreholes. The hand drawn transparencies interpreted by Jim Kellet were scanned into a 2bit tiff file format. Scanned images were then rectified within ArcGIS and vectorised into linework using the ArcScan toolset to produce the polygon dataset Linework and were attributed with a contour value within the field "height", as well as a DESCRIPTION of the line TYPE in the field "descript". The grid surface was created using the Topo to Raster tool in the Spatial Analyst toolset from the values within the "height" field and clipped to the Revised Great Artesian Basin boundary and GEODATA TOPO 250K coastline. Note: data used to compile this map was a combination of the most recent available water level measurements (as at 2011), water level measurements at the time of drilling or the first water cut reported in drillers logs.
Google map showing geographic bounding box with values North bound -10.3492 East bound 153.1901 West bound 131.7986 South bound -33.1288
Related Links
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Product Type/Sub Type

dataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Date (publication)

2013-01-01T00:00:00

Product Type

dataset

Topic Category

elevation

GA Catalogue Number

75830 Product http://www.ga.gov.au/metadata-gateway/metadata/record/75830/

Keywords

GIS Dataset
geology
elevation
groundwater
hydrogeology
AU-NSW
AU-QLD
AU-SA
Geology

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-10.3492
East bound
153.1901
West bound
131.7986
South bound
-33.1288

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

d9838342-57d0-09d4-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Related Links
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).