Stream condition and habitat indicators

There are a number of key indicators that can be monitored to measure the stream condition and habitat of waterways.  Stream bank and bed stability, stream habitat, and riparian vegetation are important for the healthy function of aquatic ecosystems and are useful as indicators to monitor stream condition and habitat diversity. The indicators you choose to monitor will depend on what questions are being asked about the quality of water in a particular waterway.

Detailed information on each indicator, including why it is important, environmental factors that affect it, important details to consider when monitoring it, and monitoring methods are available from Chapter 7 of the Queensland community waterway monitoring manual.

Stream bank and bed stability

Stable stream banks and beds are necessary to prevent the removal (erosion) or deposition (aggradation) of stream sediments. Erosion can lead to reduced water quality, loss of aquatic habitats, and damage to infrastructure such as roads, bridges and buildings.

Stream habitat diversity

The diversity and availability of in-stream and channel habitat will influence the diversity of aquatic plants and animals present in the waterway. Different types of channel habitat include pools, riffles and rapids, backwaters, waterfalls and cascades, and runs and glides. In-stream habitat refers to the diversity of places available in which aquatic life can live, and includes logs, branches, fallen trees, terrestrial leaves and twigs, aquatic vegetation and rocks.    

Riparian vegetation disturbance

Riparian vegetation is recognised as one of the most important features for assessing the condition of waterways due to the important functions it provides, including stabilising banks, acting as a buffer zone and providing habitat for fish, birds and other wildlife. The degree to which the riparian vegetation is disturbed will impact on how well it can function effectively.

Last updated 19 February 2008