Feature Length Live Virtual Presentation 10th Australian Stream Management Conference 2021

The identification and management of active, coarse grained, meandering rivers in Victoria, Australia (#101)

Ross Hardie 1 , Petter Nyman 1 , Ian Rutherfurd 2
  1. Alluvium Consulting Australia Pty Ltd, Cremorne, VIC, Australia
  2. The University of Melbourne, Melbourne, Victoria , Australia

This paper describes the outcomes of an investigation that sought to identify and develop management options for active course grained meandering rivers in Victoria. Active coarse grained meandering rivers have been identified as being particularly problematic in Victoria. These stream systems are characterised by unconfined or partly confined channel boundaries and the presence of gravel or cobble stream beds. The flood event bed shear stress in these systems is often less than the shear resistance of the armoured bed material, making the stream bed resistant to channel incision. However, the bank material, not subject to the armouring process is vulnerable to erosion in the absence of protective riparian vegetation. Most of these systems in Victoria have been cleared of the native riparian and floodplain vegetation that limited the lateral movement of these systems. This has rendered these stream systems as being subject to ongoing active channel movement. This movement has created management problems for adjoining landholders and impacted on instream aquatic values. The investigation identified the location and extent of these stream systems in Victoria, describes the characteristics of the systems and explores the integrated river and floodplain management required to manage these systems to meet broad community aspirations.  

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