Water Electrical Conductivity (EC)

AUS-TSR-FOR-WEC General High confidence

Benchmark Value

No specific value — see range

Range: 20 to 110.9 µS/cm

Optimal Range: 20 to 110.9

Direction: Lower is desirable ↓

Form: OptimalRange

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Contributing Benchmarks

CompositeFramework Primary OptimalRange Guard MaximumOnly Guard MaximumOnly Guard OptimalRange Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard

Evidence & Context

The study found that across all sites and seasons, the electrical conductivity was consistently low, falling within a range of 20.0 to 110.9 µS/cm.

Metric Definition:

Water Electrical Conductivity (EC) in streams within tropical rainforest catchments

Benchmark Definition:

This benchmark represents the natural range of electrical conductivity in streams within tropical rainforest catchments in Australia, reflecting the concentration of dissolved ions in the water. It is based on empirical measurements from 75 forested streams in the Queensland Wet Tropics, representing the natural reference condition for the biome under production forestry.

Justification:

This benchmark is based on empirical field measurements from 75 forested streams in the Queensland Wet Tropics, representing the natural reference condition of the biome.

Sources (7)

Preview of (PDF) Water Quality Degradation of Coastal Waterways in the Wet Tropics, Australia, accessed August 2, 2025,

(PDF) Water Quality Degradation of Coastal Waterways in the Wet Tropics, Australia, accessed August 2, 2025, GreyLiterature

Ecology of streams in a biogeographic isolate 6the Queensland Wet Tropics, Australia, accessed July 21, 2025

Preview of Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000) - V, accessed July 22, 2025 Journal

1.5.2.1 Surface water - Bioregional Assessments |

Preview of Ecology of streams in a biogeographic isolatethe Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2

Ecology of streams in a biogeographic isolatethe Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2 Journal

Ecology of streams in a biogeographic isolate—the Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2

Preview of Effects of Selection Logging on Rainforest Productivity - ResearchGate, accessed July 20, 2025

Effects of Selection Logging on Rainforest Productivity - ResearchGate, accessed July 20, 2025 GreyLiterature

Effects of Selection Logging on Rainforest Productivity - ResearchGate

Preview of Namoi River Water Quality Objectives explained - NSW Government, accessed August 11, 2025,

Namoi River Water Quality Objectives explained - NSW Government, accessed August 11, 2025, Government

Percentage compliance with ANZECC water quality trigger values for aquatic ecosystems, primary contact recreation and secondary

Preview of State-Level Forest Best Management Practices - MSU College of Agriculture and Natural Resources

State-Level Forest Best Management Practices - MSU College of Agriculture and Natural Resources Government

Best Management Practices - National Association of State Foresters

Preview of Water quality guidelines - Queensland Environment Department, accessed August 1, 2025,

Water quality guidelines - Queensland Environment Department, accessed August 1, 2025, Government

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000)

Supporting Sources (15)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate, accessed August 11, 2025,

(PDF) Effects of increasing salinity on freshwater ecosystems in Australia - ResearchGate, accessed August 11, 2025,

Contextual Support GreyLiterature

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

Preview of 5.9 Conductivity | Monitoring & Assessment | US EPA

5.9 Conductivity | Monitoring & Assessment | US EPA

Contextual Support GreyLiterature

River ecosystem - Wikipedia, accessed July 20, 2025

Preview of australian tropical rainforest: Topics by Science.gov

australian tropical rainforest: Topics by Science.gov

Contextual Support Journal

australian tropical rainforest: Topics by Science.gov, accessed July 20, 2025

Preview of Characterizing nitrogen dynamics, retention and transport in a tropical rainforest stream using an in situ 15N addition

Characterizing nitrogen dynamics, retention and transport in a tropical rainforest stream using an in situ 15N addition

Contextual Support GreyLiterature

Characterizing nitrogen dynamics, retention and transport in a tropical rainforest stream using an in situ 15N addition, accessed July 20, 2025

Preview of Ecology of streams in a biogeographic isolate—the Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2, accessed July 22, 2025,

Ecology of streams in a biogeographic isolate—the Queensland Wet Tropics, Australia | Freshwater Science: Vol 34, No 2, accessed July 22, 2025,

Regulatory Framework Journal

Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC/ARMCANZ)

Preview of Effects of Selection Logging on Rainforest Productivity - UQ eSpace, accessed July 20, 2025,

Effects of Selection Logging on Rainforest Productivity - UQ eSpace, accessed July 20, 2025,

Contextual Support Direct Evidence Journal

A review of forest practice codes in Australia, accessed July 20, 2025,

Preview of Forests, fire and vegetation change impacts on Murray-Darling basin water resources

Forests, fire and vegetation change impacts on Murray-Darling basin water resources

Contextual Support GreyLiterature

Forests, fire and vegetation change impacts on Murray-Darling basin water resources, accessed July 20, 2025

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

Preview of History of Innovative Best Management Practices Development and Its Role in Addressing Water Quality Limited Waterbodies - ResearchGate

History of Innovative Best Management Practices Development and Its Role in Addressing Water Quality Limited Waterbodies - ResearchGate

Contextual Support GreyLiterature

History of Innovative Best Management Practices Development and Its Role in Addressing Water Quality Limited Waterbodies - ResearchGate, accessed July 20, 2025

Preview of Indicators: Conductivity | US EPA

Indicators: Conductivity | US EPA

Contextual Support GreyLiterature

Indicators: Conductivity | US EPA, accessed July 20, 2025

Preview of Interception water-partitioning dynamics for a pristine rainforest in Central Amazonia: Marked differences between normal and dry years - ResearchGate

Interception water-partitioning dynamics for a pristine rainforest in Central Amazonia: Marked differences between normal and dry years - ResearchGate

Contextual Support Journal

0012 Anonymous - NSW Government Water, accessed July 20, 2025

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

Direct Evidence Journal

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

Preview of TROPICAL RAINFOREST LOGGING IN NORTH ... - CiteSeerX

TROPICAL RAINFOREST LOGGING IN NORTH ... - CiteSeerX

Direct Evidence

TROPICAL RAINFOREST LOGGING IN NORTH ... - CiteSeerX, accessed July 20, 2025,

Preview of TROPICAL RAINFOREST LOGGING IN NORTH QUEENSLAND: WAS IT SUSTAINABLE? - CiteSeerX

TROPICAL RAINFOREST LOGGING IN NORTH QUEENSLAND: WAS IT SUSTAINABLE? - CiteSeerX

Contextual Support

Combined Effects of Fire and Selective Timber Harvesting on Forest Structure, Composition and Topsoil Properties in a Sub-Tropical Eucalypt Forest (Ryan et al. 2021)

Preview of Water quality | Department of Primary Industries, Queensland

Water quality | Department of Primary Industries, Queensland

Contextual Support GreyLiterature

Aquatic ecosystem response to climate, fire, and the demise of montane rainforest, Tasmania, Australia - ResearchGate, accessed July 20, 2025

Context

Region Australia
Biome Tropical & Subtropical Rainforests
Land Use Production Forestry
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 5 Jun 2026

Notes

The benchmark represents the observed natural range of electrical conductivity (EC) across 75 forested reference streams in the Queensland Wet Tropics, a core area of the target biome. This range is considered the 'best available condition' and an achievable target for production forestry operating under modern Best Management Practices (BMPs). There is no evidence of a lower critical threshold; the lowest observed values (~20 µS/cm) represent a state of high ecological health. The upper bound (~111 µS/cm) serves as a sensitive management trigger indicating departure from the natural state. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.