Soil Water Infiltration Rate

AUS-TMS-FOR-SWI General Moderate confidence

Benchmark Value

5 mm/hr

Thresholds: Lower: 5, Upper: —

Direction: Lower 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 12 benchmarks together — the OptimalRange form drives the primary score, while 11 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard MaximumOnly Guard LowerThreshold Guard MinimumOnly Guard LowerThreshold Guard OptimalRange Guard Point Guard Point Guard Point Guard OptimalRange Guard LowerThreshold Guard

Evidence & Context

Therefore, for many TMS soils, particularly those that are not inherently heavy, impermeable clays, SWIR values falling consistently < 5 mm/hr would almost certainly represent a critically low threshold, indicative of severe degradation such as heavy compaction, advanced sodicity, or the formation of a persistent surface crust.

Metric Definition:

Critically low Soil Water Infiltration Rate threshold indicating severe degradation such as compaction or sodicity.

Benchmark Definition:

This benchmark represents a critically low soil water infiltration rate threshold indicating severe soil degradation such as compaction or sodicity in Australian Tropical Monsoonal Savannas production forestry.

Justification:

Based on general soil infiltration classification systems and USDA guidelines.