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Groundwater dependent ecosystems in the upper Darling River floodplain NSW, mapped using Landsat satellite data

Created 17/10/2025

Updated 17/10/2025

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Groundwater dependent ecosystems (GDEs) rely on access to groundwater on a permanent or intermittent basis to meet some or all of their water requirements (Richardson et al., 2011). The Tasselled Cap percentile products created by Digital Earth Australia (2023) were used to identify potential GDEs for the upper Darling River floodplain study area. These percentile products provide statistical summaries (10th, 50th, 90th percentiles) of landscape brightness, greenness and wetness in imagery acquired between 1987 and present day. The 10th percentile greenness and wetness represent the lowest 10% of values for the time period evaluated, e.g. 10th greenness represents the least green period. In arid regions, areas that are depicted as persistently green and/or wet at the 10th percentile have the greatest potential to be GDEs. For this reason, and due to accessibility of the data, the 10th percentile Tasselled Cap greenness (TCG) and Tasselled Cap wetness (TCW) products were used as the basis for the assessment of GDEs for the upper Darling River floodplain study area.

This data release is an ESRI geodatabase, with layer files, including:

-      original greenness and wetness datasets extracted;

-      classified 10th percentile greenness and wetness datasets (used as input for the combined dataset);

-      combined scaled 10th percentile greenness and wetness dataset (useful for a quick glance to identify potential groundwater dependent vegetation (GDV) that have high greenness and wetness e.g. river red gums)

-      combined classified 10th percentile greenness and wetness dataset (useful to identify potential GDV/GDE and differentiate between vegetation types)

-      coefficient of variation of 50th percentile greenness dataset (useful when used in conjunction with the scaled/combined products to help identify GDEs)

For more information and detail on these products, refer to https://dx.doi.org/10.26186/148545.

References Digital Earth Australia (2023). Digital Earth Australia User Guide.
Richardson, S., E. Irvine, R. Froend, P. Boon, S. Barber, and B. Bonneville. 2011a. Australian groundwater-dependent ecosystem toolbox part 1: Assessment framework. Waterlines Report 69. Canberra, Australia: Waterlines.

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Additional Info

Field Value
Title Groundwater dependent ecosystems in the upper Darling River floodplain NSW, mapped using Landsat satellite data
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/89af5267-a8be-4894-b6cc-6eada39509e3
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 10/08/2023
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        142.8,
        -32.0
      ],
      [
        148.0,
        -32.0
      ],
      [
        148.0,
        -29.0
      ],
      [
        142.8,
        -29.0
      ],
      [
        142.8,
        -32.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Groundwater dependent ecosystems in the upper Darling River floodplain NSW, mapped using Landsat satellite data". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/groundwater-dependent-ecosystems-in-the-upper-darling-river-floodplain-nsw-mapped-using-landsat