NSW Department of Climate Change, Energy, Environment and Water (DCCEEW 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 instream value layer is a combination of four individual criterion layers. The final or overall HEVAE score is determined for each River Style® reach. This is calculated by adding together the final scores for each criterion (Naturalness, Diversity, Distinctiveness and Vital Habitat). This score is then standardised by dividing by the maximum combined HEVAE score for a whole catchment's river reaches to provide an even spread of score outcomes between 0 (lowest) and 1 (highest). The distinctiveness value criteria of HEVAE were updated in 2018 by including the predicted threatened fish species distribution data (MaxEnt modelled data) provided by DPI Fisheries. The final or overall HEVAE scores where then recalculated after this process.

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Metadata Portal Metadata Information

Content Title	HEVAE Instream Value NSW
Content Type	Hosted Feature Layer
Description	NSW Department of Climate Change, Energy, Environment and Water (DCCEEW Water) has adopted the Guidelines of Identifying High Ecological Value Aquatic Ecosystems (HEVAE) framework developed by the Australian Commonwealth Government.
Initial Publication Date	28/08/2024
Data Currency	28/08/2024
Data Update Frequency	API
Content Source	API
File Type	Imagery Layer
Attribution
Data Theme, Classification or Relationship to other Datasets
Accuracy
Spatial Reference System (dataset)	GDA94
Spatial Reference System (web service)	Other
WGS84 Equivalent To	GDA94
Spatial Extent
Content Lineage
Data Classification	Unclassified
Data Access Policy	Open
Data Quality
Terms and Conditions	Creative Common
Standard and Specification
Data Custodian	NSW Department of Climate Change, Energy, Environment and Water
Point of Contact	NSW Department of Climate Change, Energy, Environment and Water
Data Aggregator
Data Distributor
Additional Supporting Information
TRIM Number

HEVAE Instream Value NSW