Water type Water depth Supratidal (<3000 mg/L) Intertidal Brackish* (3000-5000 mg/L) Subtidal Saline (>5000 mg/L) Shallow OR Deep Abyssal Acidic (<6) Neutral (6-8) Alkaline (>8) *Brackish may not be important for all systems. If so, change saline metric to 3000 mg/L. **pH may change with the changing hydrograph; if so, the pH should be used. ‘normal’ Water regime Exposure Presence of water*: Sheltered Permanently inundated Exposed Seasonally inundated Aseasonally inundated Water Logged*** OR** Commonly wet (>70% of time) Periodic inundation Water Logged*** * This attribute may include sub-metrics to support environmental flow assessment data is available. Potential sub-metrics for detailed flow regime include flow to achieve inundation/commence to flow, duration, 10 year representation of flow etc. available from records or modelling. ** Where data is limited. Based on remote sensing plus expert knowledge. *** Included to accommodate seasonally waterlogged areas in temperate Australia and Alpine bogs etc. that are generally not inundated. Vegetation/fringing vegetation Dominant vegetation Forested Shrub Sedge/grassland/forb No emergent vegetation Riverine, Lacustrine, Palustrine and Floodplain attributes Landform The ANAE provides the following guidance on the landform attribute for riverine, lacustrine and palustrine systems (Table 8). 8: Description of ANAE landform attribute (AETG 2012) Attribute Metrics and thresholds References Whilst this attribute is with at the High Energy Potential sources include landscape and regional levels, there is also Upland Nanson and (1992), scope to use it at the system level, however could use Valley particularly to address reach scale issues. It Bottom Flatness Index Low Energy is more commonly used as a riverine (VBFI) or Digital Elevation Upland (Plateau) attribute, but may have application to Model (DEM) to Lowland determine valley position,
Water type (<3000 mg/L) Brackish* (3000-5000 mg/L) Saline (>5000 mg/L) OR Acidic (<6) Neutral (6-8) Alkaline (>8) *Brackish may not be important for all systems. If so, change saline metric to 3000 mg/L. **pH may change with the changing hydrograph; if so, the ‘normal’ pH should be used. Water depth Supratidal Intertidal Subtidal Shallow Deep Abyssal Water regime Presence of water*: Permanently inundated Seasonally inundated Aseasonally inundated Water Logged*** OR** Commonly wet (>70% of time) Periodic inundation Water Logged*** * This attribute may include sub-metrics to support environmental flow assessment data is available. Potential sub-metrics for detailed flow regime include flow to achieve inundation/commence to flow, duration, 10 year representation of flow etc. available from records or modelling. ** Where data is limited. Based on remote sensing plus expert knowledge. *** Included to accommodate seasonally waterlogged areas in temperate Australia and Alpine bogs etc. that are generally not inundated. Exposure Sheltered Exposed Vegetation/fringing vegetation Dominant vegetation Forested Shrub Sedge/grassland/forb No emergent vegetation Riverine, Lacustrine, Palustrine and Floodplain attributes Landform The ANAE provides the following guidance on the landform attribute for riverine, lacustrine and palustrine systems (Table 8). 8: Description of ANAE landform attribute (AETG 2012) Attribute Metrics and thresholds References Whilst this attribute is with at the landscape and regional levels, there is also scope to use it at the system level, particularly to address reach scale issues. It is more commonly used as a riverine attribute, but may have application to High Energy Upland Low Energy Upland (Plateau) Lowland Potential sources include Nanson and (1992), however could use Valley Bottom Flatness Index (VBFI) or Digital Elevation Model (DEM) to determine valley position,