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
Values approaching or exceeding 50-100 NTU, even if episodic rather than persistent, can cause acute stress to aquatic organisms and lead to substantial habitat damage, particularly through sedimentation.
Water turbidity measured in Nephelometric Turbidity Units (NTU) indicating the lower bound of acute impact threshold for episodic turbidity events in Conservation / Protected Natural Areas within Australian Temperate Dry Woodlands & Native Grasslands.
This benchmark represents the turbidity level at which episodic events can cause acute stress and habitat damage in protected natural areas of Australian temperate dry woodlands and native grasslands.
Levels associated with acute stress, significant habitat damage (e.g., sedimentation), and high risk to aquatic diversity, even if not persistent.
Sources (1)
Feral horses (Equus caballus) increase suspended sediment in subalpine streams
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
ANZECC (2000) Australian and New Zealand Guidelines for Fresh and Marine Water Quality.
View Source
Upper Murrumbidgee Waterwatch Catchment Health Indicator Program - Upper Murrumbidgee Waterwatch
View Source