Gully Density

AUS-TDG-FOR-GUL General Moderate confidence

Benchmark Value

5 m/ha
Direction: Lower is desirable ↓
Form: MaximumOnly

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.

Evidence & Context

Proposed Detrimental Threshold Interpretation: While any active gully density > 0 m/ha is sub-optimal, a gully density consistently exceeding a low level, for example, > 5-10 m/ha (equivalent to 0.05-0.1 km/km²), within a production forestry setting purportedly managed under "best practices," would strongly indicate a systemic failure of erosion control measures and represent a clearly degraded state.

Metric Definition:

Threshold indicating systemic failure of erosion control when active gully density exceeds this level.

Benchmark Definition:

Active gully density above this threshold indicates significant management failure and degradation in Australian Temperate Dry Woodlands & Native Grasslands under Production Forestry.

Justification:

Densities above 5-10 m/ha are associated with notable erosion problems and degraded states.

Sources (1)

Preview of Best Management Practices for retained areas in forestry plantations ...
Best Management Practices for retained areas in forestry plantations ... Journal

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

View Source

Supporting Sources (8)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Drivers of Gully Erosion and its Socio-economic and Environmental Effects in a Tropical Semi-arid Environment - ResearchGate, accessed May 11, 2025,
(PDF) Drivers of Gully Erosion and its Socio-economic and Environmental Effects in a Tropical Semi-arid Environment - ResearchGate, accessed May 11, 2025,
Contextual Support Journal

(PDF) Drivers of Gully Erosion and its Socio-economic and Environmental Effects in a Tropical Semi-arid Environment - ResearchGate, accessed July 17, 2025

View Source
Preview of Australia's State of the Forests Report 2018 13 Criterion 4 - DAFF, accessed August 1, 2025,
Australia's State of the Forests Report 2018 13 Criterion 4 - DAFF, accessed August 1, 2025,
Contextual Support Journal

Temperate forests and soils [Chapter 6]

View Source
Preview of Minimum width requirements for riparian zones to protect flowing waters and to conserve biodiversity, accessed July 7, 2025,
Minimum width requirements for riparian zones to protect flowing waters and to conserve biodiversity, accessed July 7, 2025,
Contextual Support Journal

The East Gippsland Soil Erosion Management Plan - Victorian Resources Online

View Source
Preview of Minimum width requirements for riparian zones to protect flowing waters and to conserve biodiversity, accessed May 15, 2025
Minimum width requirements for riparian zones to protect flowing waters and to conserve biodiversity, accessed May 15, 2025
Contextual Support GreyLiterature

Minimum width requirements for riparian zones to protect flowing waters and to conserve biodiversity

View Source
Preview of Native Vegetation of the Southern Forests: South-east Highlands, Australian Alps, South-west Slopes, and SE Corner bioregions, accessed May 15, 2025
Native Vegetation of the Southern Forests: South-east Highlands, Australian Alps, South-west Slopes, and SE Corner bioregions, accessed May 15, 2025
Contextual Support

Native Vegetation of the Southern Forests: South-east Highlands, Australian Alps, South-west Slopes, and SE Corner bioregions

View Source
Preview of Temperate forests and soils [Chapter 6], accessed August 10, 2025,
Temperate forests and soils [Chapter 6], accessed August 10, 2025,
Contextual Support

A review of the potential impacts of different fire regimes on soil erosion and sedimentation, nutrient and carb

View Source
Preview of The Gully and Stream Bank Toolbox - CSIRO, accessed July 20, 2025,
The Gully and Stream Bank Toolbox - CSIRO, accessed July 20, 2025,
Contextual Support Government

The Gully and Stream Bank Toolbox - CSIRO

View Source
Preview of www.dpi.nsw.gov.au, accessed May 15, 2025
www.dpi.nsw.gov.au, accessed May 15, 2025
Contextual Support Journal

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

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Production Forestry
  • Assessment Not Stated
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 9 Jun 2026

Notes

This threshold is qualitatively derived and indicates a point where erosion is widespread and requires significant intervention. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.