Gully Density

AUS-AKW-CON-GUL General High confidence

Benchmark Value

0 m/ha
Range: 0 to 0 m/ha
Thresholds: Lower: —, Upper: 0
Optimal Range: 0 to 0
Direction: Lower is desirable ↓
Form: Point

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 6 benchmarks together — the Point form drives the primary score, while 5 guard(s) constrain the result.

Contributing Benchmarks

Point Primary Point Guard Point Guard Point Guard LowerThreshold Guard UpperThreshold Guard

Evidence & Context

The benchmark of 0 m/ha represents the 'best available condition' for Arid Karstic Woodlands under conservation.

Metric Definition:

Gully Density as a measure of the length of active gully networks per hectare in the landscape.

Benchmark Definition:

Gully density is the length of active gully networks per hectare, indicating landscape incision and erosion in Arid Karstic Woodlands under conservation.

Justification:

The benchmark is justified by the geomorphic stability of the Nullarbor Plain, empirical radionuclide measurements showing negligible net soil loss, and the absence of gully erosion as a threat in conservation management plans.

Sources (2)

Preview of biodiversity - Australia state of the environment 2021, accessed July 23, 2025,
biodiversity - Australia state of the environment 2021, accessed July 23, 2025, Journal

Nullarbor Parks - Department for Environment and Water

View Source
Preview of Etched linear dunefields of the Nullarbor Plain: A record of Pliocene-Pleistocene wind patterns across southern Australia
Etched linear dunefields of the Nullarbor Plain: A record of Pliocene-Pleistocene wind patterns across southern Australia Journal

Etched linear dunefields of the Nullarbor Plain: A record of Pliocene-Pleistocene wind patterns across southern Australia

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Preview of Gully erosion prediction across a large region: Murray–Darling Basin, Australia
Gully erosion prediction across a large region: Murray–Darling Basin, Australia
Contextual Support Journal

Gully erosion prediction across a large region: Murray–Darling Basin, Australia

View Source
Preview of Yellabinna and Warna Manda Parks - Department for Environment and Water
Yellabinna and Warna Manda Parks - Department for Environment and Water
Contextual Support Journal

Yellabinna and Warna Manda Parks - Department for Environment and Water

View Source

Context

  • Region Australia
  • Biome Arid Karstic Woodlands & Shrublands
  • Land Use Conservation / Protected Natural Areas
  • Assessment Conservation Target
  • Vegetation Shrubland
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 24 Mar 2026

Notes

The optimal range is 0 m/ha, representing a stable, intact landscape with natural subterranean hydrology. Any measurable gully presence (>0 m/ha) indicates degradation due to anthropogenic disturbance.