Soil Water Infiltration Rate

AUS-TDG-AGR-SWI General Moderate confidence

Benchmark Value

No specific value — see range
Range: 50 to 100 mm/hr
Optimal Range: 50 to 100
Direction: Higher is desirable ↑
Form: OptimalRange

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

An Optimal Range for SWIR in this context is proposed as 50 - 100 mm/hr, with the potential for rates to be even higher, approaching the natural saturation limits for specific soil types under excellent management.

Metric Definition:

Soil Water Infiltration Rate (SWIR) range indicating optimal soil hydrological function.

Benchmark Definition:

This benchmark defines the optimal range of soil water infiltration rates that support rapid water entry, minimize runoff and erosion, and promote good soil aeration and water storage in temperate dry woodlands and native grasslands under agricultural crop production.

Justification:

The lower bound is anchored by observed rates in well-structured agricultural soils; higher rates are demonstrated by studies under conservation tillage and 100% surface cover.

Sources (2)

Preview of Effects of crop and pasture rotations and surface cover on rainfall infiltration on a Kandosol in south-west Queensland - ResearchGate
Effects of crop and pasture rotations and surface cover on rainfall infiltration on a Kandosol in south-west Queensland - ResearchGate

Effects of crop and pasture rotations and surface cover on rainfall infiltration on a Kandosol in south-west Queensland - ResearchGate

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Preview of Healthy soils and water infiltration in the paddock - Local Land Services - NSW Government
Healthy soils and water infiltration in the paddock - Local Land Services - NSW Government Government

Healthy soils and water infiltration in the paddock - Local Land Services - NSW Government

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Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Preview of Farming for the future: optimising soil health for a sustainable future in Australian broadacre cropping - Grains Research and Development Corporation (GRDC)
Farming for the future: optimising soil health for a sustainable future in Australian broadacre cropping - Grains Research and Development Corporation (GRDC)
Contextual Support

Farming for the future: optimising soil health for a sustainable future in Australian broadacre cropping - Grains Research and Development Corporation (GRDC)

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Preview of Soil Health AssessmentGuide - Soils For Life
Soil Health AssessmentGuide - Soils For Life
Contextual Support

Comparing infiltration rates in soils managed with conventional and alternative farming methods: A meta-analysis

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Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Agricultural Crop Production
  • Assessment Pristine Reference
  • Evidence Type HealthyOperationalRange

Lifecycle

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

Notes

Optimal SWIR values depend on soil texture; sandy soils may have higher optimal rates than clay soils. No upper detrimental threshold — higher values are always better up to natural saturation.

Related Benchmarks

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