The AUSRIVAS macroinvertebrate predictive modelling software implements the predictive modelling system described in section 1.1, ‘What is AUSRIVAS?’.

The user enters test site taxonomic and physical/chemical data into the software (see Section 4.2, ‘Preparing and entering data’). This information is used, along with model data located on a central server (see Section 1.3, ‘How the software uses the Internet’) to produce a variety of information about the condition of the test site. The outputs of the software are tabular data, ordered in 'sheets'. The sheets that provide information that can be used to assess the condition of a test site are:

1.        Group probabilities

2.        Taxa probabilities

3.        Predicted/collected

4.        Unused bugs

Detailed descriptions of these and other outputs from the software can be found in Chapter 5, ‘AUSRIVAS outputs’.