The CFEV Rivers data layer shows a statewide drainage network for Tasmania. Individual rivers sections (stream sections between confluences) are rated according to their overall conservation value (relative to other river sections), as assessed by the Conservation of Freshwater Ecosystem Values (CFEV) Program. The data also includes an assessment of condition and conservation management priority for each river section.

The CFEV Rivers spatial data layer (drainage network) was developed by updating the LIST 1:25,000 drainage network. The resultant data layer is a directed network of drainage, including provision for artificial drainage modifications such as major pipelines and canals. The drainage network was developed, in several phases, in conjunction with the River Section Catchments spatial data layer as an overall catchment model. Specific details of this model can be found in the CFEV Technical Report (http://dpipwe.tas.gov.au/water/water-monitoring-and-assessment/cfev-program/cfev-resources#TheCFEVTechnicalReport). Individual features (river sections) within the CFEV Rivers data layer have been assessed using the CFEV assessment framework. This included a classification, condition assessment and rankings of conservation value and conservation management priority. Details of the framework can be found on the CFEV Program website (http://dpipwe.tas.gov.au/water/water-monitoring-and-assessment/cfev-program/about-the-cfev-project) and in the CFEV Project Technical Report. Limitations: Although individual river sections are linked by attributes, it is not fully linked spatially. Small unconnected sections have been removed and the sink-draining algorithm has taken a â¿¿best guessâ¿¿ approach when deciding which path water takes. Currency: The results of the CFEV assessment were completed and released in 2005. Completeness: The CFEV Rivers data set is complete for all Tasmania excluding Macquarie Island.