Water Turbidity
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 8 benchmarks together — the OptimalRange form drives the primary score, while 7 guard(s) constrain the result.
Evidence & Context
Persistent turbidity values >25 NTU would likely indicate significant ecological stress and degradation.
Water turbidity measured in Nephelometric Turbidity Units (NTU) indicating the upper detrimental threshold for significant ecological degradation in Conservation / Protected Natural Areas within Australian Temperate Dry Woodlands & Native Grasslands.
This benchmark indicates the turbidity level above which significant ecological degradation is likely in protected natural areas of Australian temperate dry woodlands and native grasslands.
Exceeds general upland river trigger values; levels associated with significant ecological stress, habitat degradation, and potential loss of biodiversity.
Sources (1)
ANZECC (2000) Australian and New Zealand Guidelines for Fresh and Marine Water Quality.
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
Feral horses (Equus caballus) increase suspended sediment in subalpine streams
View Source
Upper Murrumbidgee Waterwatch Catchment Health Indicator Program - Upper Murrumbidgee Waterwatch
View Source