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Spatial Layer of HEVAE Vegetation Groundwater Dependent Ecosystems Value in NSW

Created 24/06/2025

Updated 24/06/2025

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NSW DoI Water has adopted the Guidelines for Identifying High Ecological Value Aquatic Ecosystems (HEVAE) framework developed by the Australian Commonwealth Government. In the current assessment for NSW, the HEVAE consists of four key criteria which include diversity, distinctiveness, naturalness and vital habitat. Therefore, the HEVAE vegetation GDE value layer is a combination of four individual criterion layers. The final or overall HEVAE score was determined for vegetation PCT polygons which has a high probability of being groundwater dependent. This was calculated by adding together the final scores for each criterion (Naturalness, Diversity, Distinctiveness and Vital Habitat). This score was then standardised by dividing by the maximum combined HEVAE score for a whole catchment’s vegetation GDE polygons to provide an even spread of score outcomes between 0 (lowest) and 1 (highest). For ease of data modelling and management, the dataset was divided into the following catchment management areas; Border Rivers-Gwydir, Central Tablelands, Central West, Hawkesbury-Nepean, Hunter-Central Rivers, Lachlan, Lower Murray Darling, Murray, Murrumbidgee, Namoi, Northern Rivers, Southern Rivers, Southern Tablelands, Sydney Metro and Western Division (MDB and far west subdivided further into the IBRA Sub regions).

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Additional Info

Field Value
Title Spatial Layer of HEVAE Vegetation Groundwater Dependent Ecosystems Value in NSW
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/dataset/72536678-be5f-4b35-af22-8fdf89e246ab
Remote Last Updated 02/08/2024
Contact Point
Reference Period 01/06/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        141,
        -37.5
      ],
      [
        141,
        -28
      ],
      [
        154,
        -28
      ],
      [
        154,
        -37.5
      ],
      [
        141,
        -37.5
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "Spatial Layer of HEVAE Vegetation Groundwater Dependent Ecosystems Value in NSW". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-hevae-vegetation-groundwater-dependent-ecosystems-in-nsw