Soil Water Infiltration Rate

AUS-ASC-AGR-SWI General Moderate confidence

Benchmark Value

5 mm/hr
Thresholds: Lower: 5, Upper: —
Direction: Higher is desirable ↑
Form: LowerThreshold

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 18 benchmarks together — the OptimalRange form drives the primary score, while 17 guard(s) constrain the result.

Evidence & Context

A steady-state infiltration rate below 5 mm/hr for Alpine Humus Soils under agricultural use would indicate significant degradation and impaired hydrological function.

Metric Definition:

Steady-state soil water infiltration rate (SWIR) representing the intrinsic capacity of soil to transmit water through the profile once initially wetted.

Benchmark Definition:

A steady-state soil water infiltration rate below 5 mm/hr indicates significant impairment of soil hydrological function in agricultural Alpine Humus Soils.

Justification:

Indicates significant soil degradation (compaction, poor structure), increased runoff/erosion risk. Well below expected capacity of healthy Alpine Humus Soils and significantly lower than ARR Group C/D soils.

Sources (1)

Preview of Impacts of Road Disturbance on Soil Properties and on Exotic Plant Occurrence in Subalpine Areas of the Australian Alps - ResearchGate, accessed on May 31, 2025
Impacts of Road Disturbance on Soil Properties and on Exotic Plant Occurrence in Subalpine Areas of the Australian Alps - ResearchGate, accessed on May 31, 2025 Journal

Impacts of Road Disturbance on Soil Properties and on Exotic Plant Occurrence in Subalpine Areas of the Australian Alps - ResearchGate

View Source

Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Preview of Alfalfa planting significantly improved alpine soil water infiltrability in the Qinghai-Tibetan Plateau
Alfalfa planting significantly improved alpine soil water infiltrability in the Qinghai-Tibetan Plateau
Direct Evidence

Alfalfa planting significantly improved alpine soil water infiltrability in the Qinghai-Tibetan Plateau

View Source
Preview of Infiltration rates and soil moisture in a groved mulga community near Alice Springs, arid central Australia: Evidence for complex internal rainwater redistribution in a runoff-runon landscape | Request PDF - ResearchGate
Infiltration rates and soil moisture in a groved mulga community near Alice Springs, arid central Australia: Evidence for complex internal rainwater redistribution in a runoff-runon landscape | Request PDF - ResearchGate
Contextual Support Journal

Infiltration rates and soil moisture in a groved mulga community near Alice Springs, arid central Australia: Evidence for complex internal rainwater redistribution in a runoff-runon landscape | Request PDF - ResearchGate

View Source
Preview of theaustralianalpsnationalparks.org, accessed on May 25, 2025,
theaustralianalpsnationalparks.org, accessed on May 25, 2025,
Contextual Support Journal

theaustralianalpsnationalparks.org

View Source

Context

  • Region Australia
  • Biome Alpine and Subalpine Complex
  • Land Use Agricultural Crop Production
  • Assessment Pristine Reference
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 25 Mar 2026

Notes

Represents a critical lower threshold for soil function in agricultural Alpine Humus Soils.

Related Benchmarks

Other benchmarks in the AUS-ASC-AGR-SWI family.