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Hydrogeological Landscapes (HGL) of the Australian Capital Territory 2017 (Third Edition)

Created 24/06/2025

Updated 24/06/2025

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This dataset supersedes all earlier versions of 'Hydrogeological Landscapes (HGL) of the Australian Capital Territory'. It incorporates HGL boundary and management area edits based on updated soil landscape mapping for the ACT. The focus of this dataset is the Australian Capital Territory. It contains digital spatial data developed to assist in land management decision making in the ACT. The dataset contains hazard ratings for land salinity, stream salt load and stream EC as well as overall salinity hazard for each HGL unit. Information about landscape functions and appropriate salinity management strategies are also listed. Hyperlinks to full management descriptions for each HGL unit are provided. The Hydrogeological Landscape (HGL) concept provides a structure for understanding how differences in salinity are expressed across the landscape. A HGL spatially differentiates areas with similar salt stores and pathways for salt mobilisation. The process of delineating a HGL relies on the integration of a number of causative factors: geology, soils, slope, regolith thickness, and climate; an understanding of the different modes of salinity development; and the impacts of salinity within landscapes (land salinity, salt load and salt concentration in streams due to salt contributions from base flow and runoff ). Information sources such as soil landscape maps, site characterisation, salinity occurrence maps, hydrogeological data, surface water and groundwater data are incorporated into standardised unit descriptions. Spatial resolution for this product is 1:50 000.

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Additional Info

Field Value
Title Hydrogeological Landscapes (HGL) of the Australian Capital Territory 2017 (Third Edition)
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/dataset/a26ef5c6-df28-4f09-ba94-39cdb2d56eb7
Remote Last Updated 27/02/2024
Contact Point
Reference Period 04/01/2017 - 22/05/2017
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        148.738,
        -35.933
      ],
      [
        148.738,
        -35.111
      ],
      [
        149.414,
        -35.111
      ],
      [
        149.414,
        -35.933
      ],
      [
        148.738,
        -35.933
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "Hydrogeological Landscapes (HGL) of the Australian Capital Territory 2017 (Third Edition)". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-hydrogeological-landscapes-hgl-of-the-australian-capital-territory-third-edition