Knowing then doing, or is it doing then knowing? Environmental flows and bank condition monitoring in the Goulburn River, Australia — ASN Events

Knowing then doing, or is it doing then knowing? Environmental flows and bank condition monitoring in the Goulburn River, Australia (#184)

Geoff Vietz 1 , Simon Casanelia 2 , Geoff Earl 2 , Courtney Johnson 3 , Iwona Conlan 4
  1. The University of Melbourne, Burnley, VIC, Australia
  2. Goulburn Broken Catchment Management Authority, Shepparton
  3. Victorian Environmental Water Holder, Melbourne
  4. Commonwealth Environmental Water Holder, Canberra, ACT

Managed environmental flows influence hydrologic variability in rivers to provide appropriate physical conditions for biota. The volume and rate of managed flows, however, can also lead to changes in riverbank geomorphology that may alter rates of erosion and deposition and reduce benefits for biota.  Strategic environmental flow delivery and adaptive management linked to monitoring can help mitigate these risks. As a component of the Long Term Intervention Monitoring in the Goulburn River, Australia, we monitor bank erosion in concert with the Victorian Environmental Water Holder, Commonwealth Environmental Water Holder and the Goulburn Broken Catchment Management Authority. Through quantitative measurements using erosion pins, and qualitative assessment of erosion mechanisms, we assess hydrogeomorphic changes in response to the delivery of a range of planned and natural flow events. These events drive the monitoring program but the characteristics of planned events are also partially influenced by feedback from observations where, for example, bank erosion mechanisms appear to be influenced by past events. This ongoing monitoring project represents a mutually beneficial, science-practice collaboration. It demonstrates that good relationships between monitoring and management teams can reduce the time needed to incorporate improved knowledge into operations, as well as creating opportunities to learn by doing.

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