Soil Water Infiltration Rate

AUS-TMI-AGR-SWI General Moderate confidence

Benchmark Value

10 mm/hr

Thresholds: Lower: 10, 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.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard LowerThreshold Guard MinimumOnly Guard LowerThreshold Guard LowerThreshold Guard OptimalRange Guard LowerThreshold Guard UpperThreshold Guard OptimalRange Guard LowerThreshold Guard OptimalRange Guard LowerThreshold Guard OptimalRange Guard

Evidence & Context

Synthesizing these figures, a steady-state infiltration rate of < 10 mm/hr is proposed as the Lower Critical Threshold for agricultural soils in this biome.

Metric Definition:

Lower Critical Threshold for soil water infiltration rate below which soil hydrological function is significantly impaired.

Benchmark Definition:

This benchmark represents the lower critical threshold for soil water infiltration rate indicating severe structural degradation and impaired function in agricultural soils of the Tropical & Subtropical Maritime Islands biome.

Justification:

Below this value, the soil's capacity to accept water from typical rainfall events is severely restricted, leading to runoff, erosion, and reduced water availability for plants.

Sources (3)

Preview of Soil Carbon Sequestration Potential: A review for Australian agriculture - MLA, accessed August 5, 2025,

Soil Carbon Sequestration Potential: A review for Australian agriculture - MLA, accessed August 5, 2025, Journal

Spatial distribution of soil microbial activity and soil properties ..., accessed August 13, 2025,

View Source

Preview of Soil Health: Supporting Rural Industries in the Wet Tropics, accessed July 25, 2025,

Soil Health: Supporting Rural Industries in the Wet Tropics, accessed July 25, 2025, GreyLiterature

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

View Source

Preview of The relationships between land management practices and soil condition and the quality of ecosystem services delivered from agri - DAFF, accessed July 22, 2025,

The relationships between land management practices and soil condition and the quality of ecosystem services delivered from agri - DAFF, accessed July 22, 2025, Journal

Maintaining groundcover to reduce erosion and sustain production - NSW Department of Primary Industries

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Standard range of water infiltration rate for plantation or agricultural purpose - ResearchGate

Contextual Support GreyLiterature

Standard range of water infiltration rate for plantation or agricultural purpose - ResearchGate

View Source

TROPICAL SOILS | Terrain NRM, accessed July 16, 2025,

Direct Evidence Journal

Water Retention - Oz Soils 4 - UNE, accessed May 11, 2025,

View Source

Context

Region Australia
Biome Tropical & Subtropical Maritime Islands
Land Use Agricultural Crop Production
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 21 Mar 2026

Notes

This threshold marks a fundamental state change from water absorption to water shedding. No upper detrimental threshold — higher values are always better up to natural saturation.

Related Benchmarks

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