Freshwater Catchment Ecosystem Health Scorecards

 ()  Report card

Report card for  ()
Site details
Overall grade ()
Catchment
Suburb
Site status
Stream quality report card for  ()
Stream quality ()
Macroinvertebrate Invertebrates are species that do not have a backbone, aquatic macroinvertebrates (insects, crustaceans, snails) are large enough to be seen without the use of a microscope. Total no. of macroinvertebrate families Taxa A taxon (plural taxa) refers to a group to which organisms are assigned (includes species, genus, family, order, class, and phylum). Taxa richness
Stream pollution index Calculates a stream quality rating (based on the sensitivity of macroinvertebrates to disturbance, their biodiversity and abundance). Stream Pollution Index (SPI) Stream quality rating Stream quality rating is determined when compared to the Steam Pollution Index (SPI) outcome, namely:
Excellent (>6)
Good (4 to 6)
Fair (3 to <4)
Poor (<3).
Stream quality rating
Water quality report card for  ()
Water quality ()
Conductivity/Salinity A measure of dissolved salts, measured by electrical conductivity (EC) – microsiemens per centimetre (µs/cm). Salinity generally increases at times of low flow and as water levels lower. Salty water more readily conducts electricity than fresh. Conductivity (µs/cm) Turbidity A measure of ability of light to pass through water - Nephelometric Turbidity Unit (NTU). Provides an estimate of the suspended solids, algae and plankton present in the water Turbidity (NTU)
Dissolved oxygen A measure of the amount of oxygen in the water - milligrams per litre (mg/L) and percentage (%).

To an extent this can illustrate overall health, if oxygen levels are high it can be presumed pollution levels in the water are low. Oxygen in water is also required by aquatic fauna to survive.
Dissolved oxygen (mg/L)
Dissolved oxygen A measure of the amount of oxygen in the water - milligrams per litre (mg/L) and percentage (%).

To an extent this can illustrate overall health, if oxygen levels are high it can be presumed pollution levels in the water are low. Oxygen in water is also required by aquatic fauna to survive.
Dissolved oxygen (%)
pH A measure of acidity or alkalinity – the pH scale ranges from 0 to 14 (Acidic 0 to 6.9 / Neutral 7 / Alkaline 7.1 to 14).

pH varies naturally and can cause problems for aquatic fauna if values are in the extreme. A pH range of 6.5 to 8 is optimal for freshwater.
pH
Available phosphates Measuring one of three main measures of plant nutrients (phosphate, nitrogen and potassium) – phosphate milligrams per litre (PO4mg/L).

Too high nutrient levels can result in algal blooms and excessive growth of aquatic flora, which can lead to choking of the waterway, increased fluctuations of dissolved oxygen levels, creation of a monoculture, and a reduction in aesthetic quality of the waterway.
Available phosphorous (PO4mg/L)
Riparian report card for  ()
Riparian assessment ()
Riparian Derived from Latin "ripa" meaning "river bank", a riparian area refers to the zone between the land and a river or stream. Plant communities along these margins are referred to as riparian vegetation.

Riparian assessment outcome range:
Excellent (<75 to ≤100)
Good (>50 to ≤75)
Fair (>25 to ≤50)
Poor (≤25)
Riparian assessment score (out of 100)
Riparian assessment outcome

Return to overview map

Page last updated: 07 January 2019