Water Turbidity

AUS-AIF-FOR-WTU General Moderate confidence

Benchmark Value

No specific value — see range
Range: 330 to 1000 NTU
Optimal Range: 330 to 1000
Direction: Lower is desirable ↓
Form: OptimalRange

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.

Contributing Benchmarks

OptimalRange Primary UpperThreshold Guard OptimalRange Guard UpperThreshold Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard

Evidence & Context

The median values from this study are presented as the most reliable indicators of central tendency in these highly skewed datasets.

Metric Definition:

Water turbidity measured as the concentration of suspended particles in water, expressed in Nephelometric Turbidity Units (NTU), stratified by hydrological flow phase.

Benchmark Definition:

This benchmark represents the median water turbidity values across different flow phases in arid inland floodplains, reflecting natural background conditions relevant to production forestry.

Justification:

The benchmark is a proxy based on data from minimally disturbed arid river catchments, justified on the principle that best-practice forestry aims to emulate natural background conditions by minimizing sediment delivery to streams.

Sources (1)

Preview of (PDF) Water quality in two Australian dryland rivers: spatial and temporal variability and the role of flow - ResearchGate, accessed July 30, 2025,
(PDF) Water quality in two Australian dryland rivers: spatial and temporal variability and the role of flow - ResearchGate, accessed July 30, 2025,

(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate

View Source

Supporting Sources (28)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Ecological roles and threats to aquatic refugia in arid landscapes: dryland river waterholes - ResearchGate, accessed July 20, 2025
(PDF) Ecological roles and threats to aquatic refugia in arid landscapes: dryland river waterholes - ResearchGate, accessed July 20, 2025
Contextual Support Journal

An environmental flow to an ephemeral creek increases the input of carbon and nutrients to a downstream receiving river - Frontiers

View Source
Preview of A long view of ecosystem health in the Murray-Darling Basin - CSIRO, accessed July 20, 2025
A long view of ecosystem health in the Murray-Darling Basin - CSIRO, accessed July 20, 2025
Contextual Support Government

Rural land uses and water quality - a community resource document

View Source
Preview of An environmental flow to an ephemeral creek increases the input of carbon and nutrients to a downstream receiving river - Frontiers, accessed July 20, 2025
An environmental flow to an ephemeral creek increases the input of carbon and nutrients to a downstream receiving river - Frontiers, accessed July 20, 2025
Contextual Support Government

An environmental flow to an ephemeral creek increases the input of carbon and nutrients to a downstream receiving river - Frontiers, accessed July 20, 2025

View Source
Preview of Australia's State of the Forests Report, accessed August 12, 2025
Australia's State of the Forests Report, accessed August 12, 2025
Contextual Support Journal

Change in Organic Carbon in Forest Plantation Soils in Eastern ..., accessed July 20, 2025,

View Source
Preview of Australia's Sustainable Forest Management - DAFF, accessed July 12, 2025,
Australia's Sustainable Forest Management - DAFF, accessed July 12, 2025,
Contextual Support

Sustainable forest management: the Australian context - DAFF

View Source
Preview of Best Management Practices - National Association of State Foresters, accessed July 12, 2025,
Best Management Practices - National Association of State Foresters, accessed July 12, 2025,
Contextual Support Government

Best Management Practices - National Association of State Foresters

View Source
Preview of Characterising the relationship between water quality and water quantity, accessed August 5, 2025
Characterising the relationship between water quality and water quantity, accessed August 5, 2025
Contextual Support Journal

Turbidity | Australia state of the environment 2021

View Source
Preview of Clarity and colour - WetlandInfo, accessed August 12, 2025,
Clarity and colour - WetlandInfo, accessed August 12, 2025,
Contextual Support Government

Determining Tipping Points and Responses of Macroinvertebrate Traits to Abiotic Factors in Support of River Management - PMC - PubMed Central

View Source
Preview of Criterion 4: Conservation and maintenance of soil and water resources - DAFF, accessed August 1, 2025,
Criterion 4: Conservation and maintenance of soil and water resources - DAFF, accessed August 1, 2025,
Contextual Support

Australia's State of the Forests Report

View Source
Preview of Ecological impacts of invasive carp in Australian dryland rivers - UQ eSpace, accessed July 20, 2025
Ecological impacts of invasive carp in Australian dryland rivers - UQ eSpace, accessed July 20, 2025
Contextual Support Journal

Ecological impacts of invasive carp in Australian dryland rivers - UQ eSpace

View Source
Preview of Ecological roles and threats to aquatic refugia in arid landscapes: dryland river waterholes, accessed July 20, 2025
Ecological roles and threats to aquatic refugia in arid landscapes: dryland river waterholes, accessed July 20, 2025
Contextual Support Journal

Australia's forests - DAFF

View Source
Preview of Forests, fire and vegetation change impacts on Murray-Darling basin water resources, accessed May 15, 2025,
Forests, fire and vegetation change impacts on Murray-Darling basin water resources, accessed May 15, 2025,
Contextual Support

Australia's State of the Forests Report 2008

View Source
Preview of Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,
Guidance document for assessing and managing water quality in temporary waters, accessed July 16, 2025,
Contextual Support Journal

Guidance document for assessing and managing water quality in temporary waters, accessed July 10, 2025,

View Source
Preview of Inland water - Australia state of the environment 2021, accessed July 20, 2025
Inland water - Australia state of the environment 2021, accessed July 20, 2025
Contextual Support Journal

Land-based aquaculture - Department of Primary Industries and Regions South Australia - PIRSA, accessed July 20, 2025,

View Source
Preview of Inland waters - CSIRO Publishing, accessed July 20, 2025
Inland waters - CSIRO Publishing, accessed July 20, 2025
Contextual Support GreyLiterature

Resilience of floodplain ecosystems in a semi-arid environment - CSIRO Publishing, accessed July 20, 2025,

View Source
Preview of Mechanistic effects of low-flow hydrology on riverine ecosystems: ecological principles and consequences of alteration - BioOne Complete, accessed July 20, 2025
Mechanistic effects of low-flow hydrology on riverine ecosystems: ecological principles and consequences of alteration - BioOne Complete, accessed July 20, 2025
Contextual Support Journal

Mechanistic effects of low-flow hydrology on riverine ecosystems: ecological principles and consequences of alteration - BioOne Complete

View Source
Preview of Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 18, 2025,
Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research, accessed July 18, 2025,
Contextual Support Journal

Persistence of in-stream waterholes in ephemeral rivers of tropical northern Australia and potential impacts of climate change - CSIRO PUBLISHING | Marine and Freshwater Research

View Source
Preview of Review of the current state of knowledge for the monitoring of forestry impacts on waterway health in NSW coastal forests - Natural Resources Commission, accessed August 9, 2025
Review of the current state of knowledge for the monitoring of forestry impacts on waterway health in NSW coastal forests - Natural Resources Commission, accessed August 9, 2025
Contextual Support Journal

Review of the current state of knowledge for the monitoring of ..., accessed July 31, 2025,

View Source
Preview of Rural land uses and water quality - a community resource document, accessed July 20, 2025
Rural land uses and water quality - a community resource document, accessed July 20, 2025
Contextual Support Journal

Rural land uses and water quality - a community resource document, accessed July 20, 2025

View Source
Preview of Sedimentation from landscape clearance-induced soil erosion threatens waterhole persistence in a semi-arid river system, southern Queensland, Australia - CSIRO Publishing, accessed July 13, 2025,
Sedimentation from landscape clearance-induced soil erosion threatens waterhole persistence in a semi-arid river system, southern Queensland, Australia - CSIRO Publishing, accessed July 13, 2025,
Contextual Support Journal

Alluvial Gully Erosion Rates and Processes Across the Mitchell ...

View Source
Preview of Surface water environments | NSW Government Water, accessed July 20, 2025
Surface water environments | NSW Government Water, accessed July 20, 2025
Contextual Support Government

Understanding ecosystem response to water management in the Murray-Darling Basin

View Source
Preview of The effects of forest management on water quality - SLU, accessed July 20, 2025
The effects of forest management on water quality - SLU, accessed July 20, 2025
Contextual Support Journal

SA Arid Lands Landscape Regional Summary 2022 Aquatic Ecosystem Condition Report, accessed July 31, 2025,

View Source
Preview of The effects of forest management on water quality | Request PDF - ResearchGate, accessed May 15, 2025,
The effects of forest management on water quality | Request PDF - ResearchGate, accessed May 15, 2025,
Contextual Support Journal

Plantations in public drinking water source areas - Government of ..., accessed July 31, 2025,

View Source
Preview of The implications of brief floodplain inundation ... - CSIRO Publishing, accessed July 20, 2025
The implications of brief floodplain inundation ... - CSIRO Publishing, accessed July 20, 2025
Contextual Support Journal

The implications of brief floodplain inundation for local and landscape-scale ecosystem function in an intermittent Australian river - CSIRO Publishing

View Source
Preview of Turbidity - Cumberland River Compact, accessed August 12, 2025,
Turbidity - Cumberland River Compact, accessed August 12, 2025,
Contextual Support GreyLiterature

The Impact of Turbidity on Aquatic Life: Insights From Turbidity Meters - BOQU Instrument, accessed July 31, 2025,

View Source
Preview of Turbidity | River Detectives, accessed July 16, 2025,
Turbidity | River Detectives, accessed July 16, 2025,
Contextual Support Journal

Kosciuszko National Park's health a mixed diagnosis in first EcoHealth Scorecard

View Source
Preview of Understanding ecosystem response to water management in the Murray-Darling Basin, accessed July 20, 2025
Understanding ecosystem response to water management in the Murray-Darling Basin, accessed July 20, 2025
Contextual Support Government

Understanding ecosystem response to water management in the Murray-Darling Basin, accessed July 20, 2025

View Source
Preview of Water quality: Land use impacts on salinity, sediments, and nutrients - ResearchGate, accessed July 20, 2025
Water quality: Land use impacts on salinity, sediments, and nutrients - ResearchGate, accessed July 20, 2025
Contextual Support GreyLiterature

Water quality: Land use impacts on salinity, sediments, and nutrients - ResearchGate

View Source

Context

  • Region Australia
  • Biome Arid Inland Floodplains & Ephemeral River Systems
  • Land Use Production Forestry
  • Assessment Not Stated
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 1 Jun 2026

Notes

No upper detrimental threshold — higher values are always worse. The reference values depend on hydrological flow phase: Flood Phase ~1000 NTU; No-Flow Phase ~540 NTU; Flow Phase ~330 NTU. The benchmark is a proxy based on minimally disturbed arid river catchments. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.