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Speewa GIS; River Murray Corridor Salinity Mapping and Interpretation Project

Note: This metadata describes the dataset in accordance with the ANZLIC (Australia New Zealand Land Information Council) Core Metadata Guidelines Version 2.


Dataset citation

ANZLIC unique identifier: ANZCW0703016255

Title: Speewa GIS; River Murray Corridor Salinity Mapping and Interpretation Project


Custodian

Custodian: Geoscience Australia

Jurisdiction: Australia


Description

Abstract:

This GIS data package contains airborne electromagnetic (AEM) datasets and interpreted data products for the Speewa survey area, as part of the River Murray Corridor (RMC) Salinity Mapping and Interpretation Project. The RMC project was undertaken between 2006 and 2010 to provide information on a range of salinity and land management issues along a 450 kilometre reach of the Murray River from the South Australian border to Gunbower, northwest of Echuca in Victoria. The Speewa survey area extends from Speewa south to Swan Hill.

This metadata briefly describes the contents of the data package. The user guide included in the package contains more detailed information about the individual datasets and available technical reports.

The main components in the package are: AEM data and images derived from a holistic inversion of the RMC RESOLVE AEM survey; a composite digital elevation model (DEM); a range of interpreted data products designed to map key elements of the hydrogeological system and salinity hazards using the AEM dataset; and a series of ESRI ArcGIS map documents.

The AEM data component consists of grids and images of modelled conductivity data derived from a holistic inversion of the RMC RESOLVE AEM survey. They include: layer conductivity grids below ground surface; depth slice grids representing the average conductivity of various regular depth intervals below ground surface; floodplain slice grids representing the average conductivity of various depth intervals relative to the elevation above or below a surface that approximates the River Murray floodplain; watertable slice grids representing the average conductivity of various intervals relative to the elevation above or below the regional watertable; and AEM cross sections of conductivity versus depth along each of the flight lines. The holistic inversion AEM data are derived from the 'River Murray Corridor RESOLVE AEM Survey, VIC & NSW, 2007 Final Data (P1141)', available as Geoscience Australia product number 67212 (GeoCat #67212).

The DEM data component consists of a 10 metre horizontal resolution composite DEM for the River Murray Corridor AEM survey area derived from airborne light detection and ranging (LiDAR) surveys, AEM surveys, and the shuttle radar topography mission (SRTM) survey.

The interpreted data component is organised into product themes to address salinity and land management questions and to map key elements of the hydrogeological system and salinity hazards. An ArcGIS map document is included for each product theme. The products include: Blanchetown Clay; conductive soils; flush zones; groundwater conductivity; stratigraphic extents and reliability; near surface conductive zones; near surface resistive zones; Parilla Sands; Quaternary alluvium; recharge; salt store; surface salt; vegetation health; and Woorinen Formation.

The RMC project was funded through the National Action Plan for Salinity and Water Quality with additional funding from the Lower Murray Catchment Management Authority (CMA), Mallee CMA, Goulburn-Murray Water and the Murray-Darling Basin Authority. The project was administered by the Australian Government Department of Agriculture, Fisheries and Forestry through the Bureau of Rural Sciences, now known as the Australian Bureau of Agricultural and Resource Economics and Sciences (ABARES). Geoscience Australia (GA) were contracted to provide geophysical services to manage the AEM system selection and data acquisition, and to process and calibrate the AEM data. The AEM survey was flown by Fugro Airborne Geophysical Services in 2007 using the helicopter-borne RESOLVE frequency domain system. The Cooperative Research Centre for Landscape Environments and Mineral Exploration was sub-contracted through GA to manage the interpretation and reporting component of the RMC project.

ANZLIC search words:

  • GEOSCIENCES Geophysics Surveys

Spatial domain:

locality map

Geographic extent name: AUSTRALIA EXCLUDING EXTERNAL TERRITORIES - AUS - Australia - Australia

Geographic extent polygon: 143.4309 -35.175, 143.5965 -35.175, 143.5965 -35.3234, 143.4309 -35.3234, 143.4309 -35.175,

Note: The format for each Geographic extent name is: Name - Identifier - Category - Jurisdiction (as appropriate) See GEN Register

Geographic bounding box:
North bounding latitude: -35.175 °
South bounding latitude: -35.3234 °
East bounding longitude: 143.5965 °
West bounding longitude: 143.4309 °

Data currency

Beginning date: 2007-02-02

Ending date: 2009-12-21


Dataset status

Progress: Complete

Maintenance and update frequency: Not Known


Access

Stored data format:
DIGITAL - pdf Adobe PDF Acrobat
DIGITAL - ArcGIS-grid ArcInfo grid GDA94
DIGITAL - shp ArcView shape file ArcView GDA94
DIGITAL - tiff Tagged Image File Format (TIFF)
DIGITAL - mxd ArcMap map ArcMap
DIGITAL - bmp Windows bitmap image
DIGITAL - jpg JPEG image GDA94
DIGITAL - bil Band interleaved by line (BIL) image
DIGITAL - ers ER Mapper raster dataset ER Mapper GDA94
DIGITAL - xls Microsoft Excel spreadsheet Excel
Available format type:
DIGITAL - jpg JPEG image GDA94
DIGITAL - shp ArcView shape file ArcView GDA94
DIGITAL - bil Band interleaved by line (BIL) image
DIGITAL - tiff Tagged Image File Format (TIFF)
DIGITAL - xls Microsoft Excel spreadsheet Excel
DIGITAL - mxd ArcMap map ArcMap
DIGITAL - ArcGIS-grid ArcInfo grid GDA94
DIGITAL - pdf Adobe PDF Acrobat
DIGITAL - ers ER Mapper raster dataset ER Mapper GDA94
DIGITAL - bmp Windows bitmap image

Access constraints:

This material is released under the Creative Commons Attribution 3.0 Australia Licence.

Free Data Download

Data quality

Lineage:

AEM data

The holistic inversion methodology used to generate the conductivity model data is described in Brodie and Sambridge (2006). Information on how the depth slice grids, floodplain slice grids and watertable slice grids were derived is included in Appendix 1 of the user guide for this data package.

The AEM survey data were acquired and processed by the airborne geophysical survey contractor, Fugro Airborne Surveys. Details of the acquisition and processing are described in Farquhar (2008) and available from ABARES publications.

DEM data

The merging of elevation datasets for the River Murray Corridor AEM project was undertaken by Geoscience Australia. The data compilation is described in Brodie (2008) and is available from ABARES publications.

Interpreted data products

The methods used to compile and customise AEM-based interpreted map products to address salinity and land management questions are described in Tan et al (2009). Tan et al (2009) is included in this data package and is also available from ABARES publications.

Additional metadata for some products are included in this data package, as described in the user guide.

Positional accuracy:

Not known

Attribute accuracy:

Not known

Logical Consistency:

Not known

Completeness:

Complete


Contact information

Contact organisation: Commonwealth of Australia (Geoscience Australia) (GA)
Contact position: Manager Client Services
Mail address: Cnr Jerrabomberra Ave and Hindmarsh Dr
Mail address: GPO Box 378
Locality: Canberra
State: ACT
Country: Australia
Postcode: 2601
Telephone: 02 6249 9966
Facsimile: 02 6249 9960
Electronic mail address: sales@ga.gov.au

Metadata information

Metadata date: 2013-03-08


Additional metadata

Metadata reference XHTML: http://www.ga.gov.au/meta/ANZCW0703016255.html

Metadata reference XML: http://www.ga.gov.au/meta/ANZCW0703016255.xml

References:

Brodie, R & Sambridge, M 2006, 'A holistic approach to inversion of frequency-domain airborne EM data', Geophysics, 71, 6, G301 - G312.

Brodie, RC 2008, Merging of elevation datasets for the River Murray corridor AEM project, Geoscience Australia, Canberra, Australia.

Farquhar, E 2008, River Murray Corridor Airborne Electromagnetic (AEM) Mapping Survey: Acquisition and Processing Report, Fugro Airborne Surveys report to the Bureau of Rural Sciences.

Tan, KP, Lawrie, KC, Halas, L, Pain, CF, Clarke, JD, Gibson, D, Apps, H, Cullen, K, Brodie, RC and Wong, V 2009, Methodology for the customised products developed as part of the River Murray Corridor Victorian AEM mapping project, Geoscience Australia, Professional Opinion 2009/12, 75pp.

Authors:Apps, H.E.
SPATIAL INFORMATION FOR THE NATION