Examples include streams, rivers, and their immediate boundary (riparian) zones. They are defined by having a linear structure and unidirectional flow regime. 

This category corresponds to IUCN-GET biome F1 (Rivers and streams).
Stocks (assets)
Flows (benefits)

Area of ecosystem asset

Units

ha

Example approach

Estimate % of total land area covered by ecosystem type, multiplied by total land area

Example methods/guidance/data sources/references

Internal records

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Units

ha

Example approach

Estimate extent using national/state/territory map data

Example methods/guidance/data sources/references

National/state/territory maps

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Units

ha

Example approach

Measure extent using remote sensing in combination with ground-truthing for detailed site mapping

Example methods/guidance/data sources/references

Producer or third party GIS

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Units

km

Example approach

Estimate length of rivers and streams within property boundaries

Example methods/guidance/data sources/references

Internal records

Notes

For long, narrow ecosystem assets such as rivers, length can better represent relevant extent than area (consider the increase in effective habitat from doubling a stream’s length as opposed to doubling its width). See SEEA-EA 2021 section 4.3.3.

Units

km

Example approach

Estimate length using national/state/territory map data

Example methods/guidance/data sources/references

National/state/territory maps

Notes

For long, narrow ecosystem assets such as rivers, length can better represent relevant extent than area (consider the increase in effective habitat from doubling a stream’s length as opposed to doubling its width). See SEEA-EA 2021 section 4.3.3.

Units

km

Example approach

Measure length using remote sensing in combination with ground-truthing for detailed site mapping

Example methods/guidance/data sources/references

Producer or third party GIS

Notes

For long, narrow ecosystem assets such as rivers, length can better represent relevant extent than area (consider the increase in effective habitat from doubling a stream’s length as opposed to doubling its width). See SEEA-EA 2021 section 4.3.3.

Water quality variables

Type

Variable

Units

Various

SEEA ECT Class

Physical and chemical state

Example approach

Estimate condition using informal sampling or visual assessment

Example methods/guidance/data sources/references

Internal records

Notes

Relevant water quality metrics and thresholds depend on the use of the water and known threats to water quality.
Example Tier 1/Tier 2 metrics might include Turbidity, Dissolved Oxygen, Organic and inorganic compounds, Nutrients, Acidity, Salinity/Total Dissolved Solids.
Tier 3 could also include additional, more difficult or costly to measure metrics such as concentrations of cyanobacteria, pathogens and parasites, heavy metals and organic contaminants, where appropriate.

See Australian and New Zealand Guidelines for Fresh and Marine Water Quality for information and guidance on how to identify relevant water quality metrics and thresholds or ‘guideline values’ for Australian and New Zealand waters.

See also: Standard Methods for the Examination of Water and Wastewater; UN Environment (2017) A Framework for Freshwater Ecosystem Management (especially Volume 2, Tables 4 and 5 which list example water quality metrics for different freshwater ecosystem types).

Type

Variable

Units

Various

SEEA ECT Class

Physical and chemical state

Example approach

Estimate condition using national/state/territory map data plus informal sampling or visual assessment

Example methods/guidance/data sources/references
Notes

Relevant water quality metrics and thresholds depend on the use of the water and known threats to water quality.
Example Tier 1/Tier 2 metrics might include Turbidity, Dissolved Oxygen, Organic and inorganic compounds, Nutrients, Acidity, Salinity/Total Dissolved Solids.
Tier 3 could also include additional, more difficult or costly to measure metrics such as concentrations of cyanobacteria, pathogens and parasites, heavy metals and organic contaminants, where appropriate.

See Australian and New Zealand Guidelines for Fresh and Marine Water Quality for information and guidance on how to identify relevant water quality metrics and thresholds or ‘guideline values’ for Australian and New Zealand waters.

See also: Standard Methods for the Examination of Water and Wastewater; UN Environment (2017) A Framework for Freshwater Ecosystem Management (especially Volume 2, Tables 4 and 5 which list example water quality metrics for different freshwater ecosystem types).

Type

Variable

Units

Various

SEEA ECT Class

Physical and chemical state

Example approach

Measure condition using site-specific remote and/or in-field sensing inputs and/or lab testing

Example methods/guidance/data sources/references

Various data and testing providers

Notes

Relevant water quality metrics and thresholds depend on the use of the water and known threats to water quality.
Example Tier 1/Tier 2 metrics might include Turbidity, Dissolved Oxygen, Organic and inorganic compounds, Nutrients, Acidity, Salinity/Total Dissolved Solids.
Tier 3 could also include additional, more difficult or costly to measure metrics such as concentrations of cyanobacteria, pathogens and parasites, heavy metals and organic contaminants, where appropriate.

See Australian and New Zealand Guidelines for Fresh and Marine Water Quality for information and guidance on how to identify relevant water quality metrics and thresholds or ‘guideline values’ for Australian and New Zealand waters.

See also: Standard Methods for the Examination of Water and Wastewater; UN Environment (2017) A Framework for Freshwater Ecosystem Management (especially Volume 2, Tables 4 and 5 which list example water quality metrics for different freshwater ecosystem types).

Type

Variable

Units

ML/s or m³/s

SEEA ECT Class

Physical and chemical state

Example approach

Estimate condition using informal sampling or visual assessment

Example methods/guidance/data sources/references

N/A

Notes

There are various ways in which riparian fragmentation could be measured. Annual average, seasonal average or even daily average flow rates can be compared with natural (undisturbed) flow rates or ‘environmental flows’ determined to protect ecological integrity.

Type

Variable

Units

ML/s or m³/s

SEEA ECT Class

Physical and chemical state

Example approach

Estimate condition using national/state/territory map data plus informal sampling or visual assessment

Example methods/guidance/data sources/references
Notes

Annual average, seasonal average or even daily average flow rates can be compared with natural (undisturbed) flow rates or ‘environmental flows’ determined to protect ecological integrity.

Type

Variable

Units

ML/s or m³/s

SEEA ECT Class

Physical and chemical state

Example approach

Measure condition using site-specific remote and/or in-field sensing inputs and/or lab testing

Example methods/guidance/data sources/references

Measure using calibrated water flow meters combined with height gauges at locations with known cross-sectional area.

Notes

Annual average, seasonal average or even daily average flow rates can be compared with natural (undisturbed) flow rates or ‘environmental flows’ determined to protect ecological integrity.

Type

Variable

Units

Various

SEEA ECT Class

Landscape and seascape characteristics

Example approach

Estimate condition using informal sampling or visual assessment

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

There are various ways in which riparian fragmentation could be measured. Relatively simple proxies could include the maximum river/stream length without barriers such as dams or the number of barriers per unit river/stream length.

Type

Variable

Units

Various

SEEA ECT Class

Landscape and seascape characteristics

Example approach

Estimate condition using national/state/territory map data plus informal sampling or visual assessment

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

There are various ways in which riparian fragmentation could be measured. Relatively simple proxies could include the maximum river/stream length without barriers such as dams or the number of barriers per unit river/stream length.

More sophisticated proxies can be based on measured differences between natural upstream and downstream discharge rates, and the discharge rate at the barrier – see Grill, G. et al. (2019) ‘Mapping the world’s free-flowing rivers’, Nature, 569(7755), pp. 215–221. Available here

Type

Variable

Units

Various

SEEA ECT Class

Landscape and seascape characteristics

Example approach

Measure condition using site-specific remote and/or in-field sensing inputs and/or lab testing

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

There are various ways in which riparian fragmentation could be measured.

More sophisticated proxies can be based on measured differences between natural upstream and downstream discharge rates, and the discharge rate at the barrier – see Grill, G. et al. (2019) ‘Mapping the world’s free-flowing rivers’, Nature, 569(7755), pp. 215–221. Available here

Type

Variable

Units

%

SEEA ECT Class

Structural state

Example approach

Estimate % of total asset area or length vegetated

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

Riparian vegetation cover is a strong predictor of other river health metrics, with 80% mid-dense forest cover in hydrologically active areas in close proximity to the stream being associated with excellent health, and 60% with good health – Sheldon, F. et al. (2012) ‘Identifying the spatial scale of land use that most strongly influences overall river ecosystem health score’, Ecological Applications, 22(8), pp. 2188–2203. Available at: https://doi.org/10.1890/11-1792.1.

Type

Variable

Units

%

SEEA ECT Class

Structural state

Example approach

Estimate % of total asset area vegetated using national/state/territory map data and/or remote sensing inputs

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

Riparian vegetation cover is a strong predictor of other river health metrics, with 80% mid-dense forest cover in hydrologically active areas in close proximity to the stream being associated with excellent health, and 60% with good health – Sheldon, F. et al. (2012) ‘Identifying the spatial scale of land use that most strongly influences overall river ecosystem health score’, Ecological Applications, 22(8), pp. 2188–2203. Available at: https://doi.org/10.1890/11-1792.1.

Type

Variable

Units

%

SEEA ECT Class

Structural state

Example approach

Measure % of total asset area vegetated using site-specific remote and/or in-field sensing inputs

Example methods/guidance/data sources/references

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Notes

Riparian vegetation cover is a strong predictor of other river health metrics, with 80% mid-dense forest cover in hydrologically active areas in close proximity to the stream being associated with excellent health, and 60% with good health – Sheldon, F. et al. (2012) ‘Identifying the spatial scale of land use that most strongly influences overall river ecosystem health score’, Ecological Applications, 22(8), pp. 2188–2203. Available at: https://doi.org/10.1890/11-1792.1.

Water abstracted

Units

ML

SEEA ES sub-type

Water supply

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final (see Notes)

Example approach

Estimate using informal sampling or visual assessment

Example methods/guidance/data sources/references

Internal records

Notes

Water abstracted may be considered an ecosystem service (e.g. where ecosystems provide essential water purification services or flow regulation services); or an abiotic flow (not dependent on any particular ecological processes). Either way, the volume extracted is the relevant measure, unless water purification services and flow regulation services can be measured separately (see SEEA-EA s.6.4.2, pp. 138-139), in which case water supply should not be measured as a separate ecosystem service, but rather as an abiotic flow (water abstracted). If water abstracted can be separated into different uses (e.g. human drinking water, livestock drinking water, irrigation) then it can be helpful to measure these amounts separately.

Units

ML

SEEA ES sub-type

Water supply

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final (see Notes)

Example approach

Estimate using informal sampling or visual assessment

Example methods/guidance/data sources/references

Internal records

Notes

Water abstracted may be considered an ecosystem service (e.g. where ecosystems provide essential water purification services or flow regulation services); or an abiotic flow (not dependent on any particular ecological processes). Either way, the volume extracted is the relevant measure, unless water purification services and flow regulation services can be measured separately (see SEEA-EA s.6.4.2, pp. 138-139), in which case water supply should not be measured as a separate ecosystem service, but rather as an abiotic flow (water abstracted). If water abstracted can be separated into different uses (e.g. human drinking water, livestock drinking water, irrigation) then it can be helpful to measure these amounts separately.

Units

ML

SEEA ES sub-type

Water supply

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final (see Notes)

Example approach

Measure using flow meters

Example methods/guidance/data sources/references

Internal records

Notes

Water abstracted may be considered an ecosystem service (e.g. where ecosystems provide essential water purification services or flow regulation services); or an abiotic flow (not dependent on any particular ecological processes). Either way, the volume extracted is the relevant measure, unless water purification services and flow regulation services can be measured separately (see SEEA-EA s.6.4.2, pp. 138-139), in which case water supply should not be measured as a separate ecosystem service, but rather as an abiotic flow (water abstracted). If water abstracted can be separated into different uses (e.g. human drinking water, livestock drinking water, irrigation) then it can be helpful to measure these amounts separately.

Units

Number

SEEA ES sub-type

River flood mitigation services

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

This metric refers to the number of people and/or buildings that can be identified as being in a lower flood risk category than they would have been in the absence of the ecosystem providing the flood mitigation service. Usually this involves an assumption that the relevant ecosystem would otherwise have been bare land (see SEEA-EA 2021, Table 7.7), and requires some form of hydrological modelling to determine risk exposure in the existing situation as well as the baseline scenario.
River flood mitigation services may be provided along with water flow regulation services (including baseline flow maintenance services and peak flow mitigation services).

Units

Number

SEEA ES sub-type

River flood mitigation services

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

This metric refers to the number of people and/or buildings that can be identified as being in a lower flood risk category than they would have been in the absence of the ecosystem providing the flood mitigation service. Usually this involves an assumption that the relevant ecosystem would otherwise have been bare land (see SEEA-EA 2021, Table 7.7), and requires some form of hydrological modelling to determine risk exposure in the existing situation as well as the baseline scenario.
River flood mitigation services may be provided along with water flow regulation services (including baseline flow maintenance services and peak flow mitigation services).

Units

Number

SEEA ES sub-type

River flood mitigation services

Intermediate or final (see SEEA-EA 2021, Table 6.3)

Final

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

This metric refers to the number of people and/or buildings that can be identified as being in a lower flood risk category than they would have been in the absence of the ecosystem providing the flood mitigation service. Usually this involves an assumption that the relevant ecosystem would otherwise have been bare land (see SEEA-EA 2021, Table 7.7), and requires some form of hydrological modelling to determine risk exposure in the existing situation as well as the baseline scenario.
River flood mitigation services may be provided along with water flow regulation services (including baseline flow maintenance services and peak flow mitigation services).

Water abstracted – Market price less production costs

Units

$/ML

Example approach

Multiply physical flow quantity by (average market price less average production costs)

Example methods/guidance/data sources/references

Water regulators and third party information providers

Notes

Unless a clear ecosystem contribution can be identified, water supply should be treated as an abiotic flow and therefore not included in the monetary valuation of ecosystem assets, but reported separately based on the observed market price (SEEA-EA, s. 6.4.5, p.142).

Units

$/ML

Example approach

Multiply physical flow quantity by (average market price less average production costs)

Example methods/guidance/data sources/references

Water regulators and third party information providers

Notes

Unless a clear ecosystem contribution can be identified, water supply should be treated as an abiotic flow and therefore not included in the monetary valuation of ecosystem assets, but reported separately based on the observed market price (SEEA-EA, s. 6.4.5, p.142).

Units

$/ML

Example approach

Multiply physical flow quantity by (average market price less average production costs)

Example methods/guidance/data sources/references

Water regulators and third party information providers

Notes

Unless a clear ecosystem contribution can be identified, water supply should be treated as an abiotic flow and therefore not included in the monetary valuation of ecosystem assets, but reported separately based on the observed market price (SEEA-EA, s. 6.4.5, p.142).

Units

N/A

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Units

N/A

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Units

N/A

Example approach

N/A

Example methods/guidance/data sources/references

N/A

Notes

TBD – please submit your suggestion at the feedback tab in the bottom right hand corner.

Last updated: 25th July 2023