Water Modelling-Modelled Data-Annual Permitted Take (APT): Simulated River Flows

NSW Department of Climate Change, Energy, the Environment and Water provides modelled annual permitted take (APT) data for river systems. The dataset contains simulated flows at several gauges, representing water availability under current development and operation rules as part of the Murray-Darling Basin Plan. APT calculations have been enforced since July 2019 to track compliance with sustainable diversion limits.

Use Cases

• Track compliance with sustainable diversion limits (SDLs) based on the cumulative difference from water year 2019–20.
• Compare modelled water flows under current conditions with other scenarios, such as the long-term average annual extraction limit (LTAAEL) model.
• Analyze the impact of water availability and climatic conditions on annual permitted take based on the APT model methodology.
• Model water resource utilization for consumptive purposes based on estimates of irrigated crop area and water entitlement holders' patterns.

Strengths

• Data is modelled based on estimates of river management and development conditions, including irrigated crop area and storage operations.
• Enforced since July 2019, providing a mechanism for tracking long-term sustainable diversion limits.
• Simulated flows are described as a fair representation of expected conditions under current development 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.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

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

Collection Method

Modelled data generated by annually extended APT models configured with estimates of river system conditions.

Time Range

Reference period 1895–2009 used for method development; APT enforcement began July 2019.

Freshness

Last updated 2026-05-12 23:51:55.819896; freshness should be verified.

Geography

River systems within the Murray-Darling Basin, Australia.