Gully Density

AUS-TMI-FOR-GUL General Low confidence

Benchmark Value

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

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is Point, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Contributing Benchmarks

Point Primary Point Guard MaximumOnly Guard Point Guard

Evidence & Context

The benchmark of 0 m/ha of active, management-induced gullies is derived from first principles.

Metric Definition:

Density of active, management-induced gullies measured as total length of active gullies per unit land area.

Benchmark Definition:

An upper detrimental threshold of 20 m/ha of active, management-induced gullies indicates significant ecological degradation in tropical and subtropical maritime island production forestry in Australia.

Justification:

Gully densities exceeding 20 m/ha represent severe ecosystem dysfunction based on proxy data from degraded tropical grazing landscapes.

Sources (5)

Preview of Certification | Department of Primary Industries, Queensland, accessed August 1, 2025,
Certification | Department of Primary Industries, Queensland, accessed August 1, 2025, Journal

Code of practice for native forest timber production on Queensland's State Forest estate 2020

View Source
Preview of Gully erosion - NIWA Client report, accessed August 12, 2025
Gully erosion - NIWA Client report, accessed August 12, 2025 Journal

Alluvial Gully Erosion Rates and Processes Across the Mitchell River Fluvial Megafan in Northern Queensland, Australia - Resilient Landscapes Hub

View Source
Preview of Human movement and gully erosion: Investigating feedback mechanisms using Frequency Ratio and Least Cost Path analysis in Tigray, Ethiopia - PMC - PubMed Central, accessed May 13, 2025
Human movement and gully erosion: Investigating feedback mechanisms using Frequency Ratio and Least Cost Path analysis in Tigray, Ethiopia - PMC - PubMed Central, accessed May 13, 2025 Journal

Human movement and gully erosion: Investigating feedback mechanisms using Frequency Ratio and Least Cost Path analysis in Tigray, Ethiopia - PubMed Central

View Source
Preview of Inquiry into forestry and mining operations on the Tiwi Islands - Parliament of Australia
Inquiry into forestry and mining operations on the Tiwi Islands - Parliament of Australia Journal

Inquiry into forestry and mining operations on the Tiwi Islands - Parliament of Australia

View Source
Preview of Reef Trust Phase IV—Gully and Stream Bank Toolbox—A technical guide for the Reef Trust Phase IV Gully and Stream Bank Erosio - DCCEEW, accessed August 12, 2025
Reef Trust Phase IV—Gully and Stream Bank Toolbox—A technical guide for the Reef Trust Phase IV Gully and Stream Bank Erosio - DCCEEW, accessed August 12, 2025 Journal

Chapter 13 Gully erosion and its control - Queensland Government ...

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Maritime Islands
  • Land Use Production Forestry
  • Assessment Conservation Target
  • Evidence Type DegradationThreshold

Lifecycle

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

Notes

This threshold is based on quantitative data from analogous degraded tropical grazing landscapes and represents a state of significant ecological degradation.

Related Benchmarks

Other benchmarks in the AUS-TMI-FOR-GUL family.

0 m/ha Low
Production Forestry ยท Conservation Target
Point Active v1