Soil Water Infiltration Rate
Benchmark Value
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 11 benchmarks together — the OptimalRange form drives the primary score, while 10 guard(s) constrain the result.
Evidence & Context
Proposed Considerations for an Upper Detrimental Threshold: SWIR > 200-250 mm/hr, particularly on sandy soils or when coupled with high nutrient inputs and high water load (intense rain/irrigation).
Soil Water Infiltration Rate (SWIR) as the velocity at which water enters the soil matrix.
This benchmark indicates an upper infiltration rate threshold beyond which the risk of nutrient leaching and environmental harm increases in Australian Tropical Monsoonal Savannas under agricultural crop production.
At rates above 200-250 mm/hr, especially on sandy soils or with high nutrient and water inputs, the risk of significant nutrient leaching beyond the root zone increases, potentially impacting groundwater quality.
Sources (1)
Nutrient Loss and Water Quality - Oklahoma State University Extension, accessed July 16, 2025,
View SourceSupporting Sources (3)
Additional references from the underlying research that informed this benchmark.
Northern Territory Department of Primary Industry and Fisheries (NT DAF) (1999)
View SourceCSIRO (2016)
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Natural Resources Conservation Service (USDA NRCS)
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