Water Modelling-Modelled Data-Long-term Average Annual Extraction Limit (LTAAEL)-Gwydir

Long-term average annual extraction limits (LTAAEL) are regulatory caps designed to ensure sustainable water use and prevent environmental degradation in river systems. The NSW Department of Climate Change, Energy, the Environment and Water publishes this dataset containing simulated flows at several gauges, generated by an annually extended LTAAEL model configured to represent water sharing plan rules. These modelled flows, last updated in May 2026, can be compared with outputs from other key scenario models like the annual permitted take (APT) or without development (WOD) models.

Use Cases

• Assess long-term water extraction compliance based on modelled LTAAEL and LTAAE comparisons.
• Compare simulated river flows under different management scenarios, such as annual permitted take or without development.
• Analyze the impact of water sharing plan rules on river system flows.
• Support regulatory reviews by the Natural Resources Commission and the Murray-Darling Basin Authority.

Strengths

• Data is produced using the 'best available models' annually, as stated in the description.
• The dataset contains flows at several gauges in each river system, providing multiple points of analysis.
• Model is configured to represent specific water sharing plan development and management rules.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The model has inherent limitations, as acknowledged in the description.

Provenance

Source

NSW Department of Climate Change, Energy, the Environment and Water

Collection Method

Modelled data generated by an annually extended LTAAEL model configured to represent water sharing plan rules.

Freshness

Last updated 2026-05-13 02:07:21.446320; freshness should be verified.

Geography

Gwydir river system, New South Wales, Australia.