Estuary entrance changes in response to an environmental flow release

Jon Hinwood, Errol McLean

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther


An environmental water releases to the Snowy River was made in October 2011 (12,000 ML/day) as part of the Snowy River Increased Flows Program. The effects on the inlet entrance morphology and tidal response were measured on four field trips for each release to cover the flow peak and recovery. Water level recorders were deployed in the principal channels over the period of the releases and for the prior two months at Marlo. The EFR raised waterlevels in the estuary but the change was attenuated by the large storage capacity and the relatively open entrance. Entrance scour was minor as the entrance channel had been enlarged by a previous catchment flow of greater magnitude than the EFR Scour primarily occurred in the intertidal zone, showing that the entrance was close to equilibrium for the EFR. This result was confirmed by analyses of the sediment transport capacity and through use of an attractor plot.

Original languageEnglish
Title of host publicationCoasts and Ports 2013: Combining the 21st Australasian Coastal and Ocean Engineering Conference and the 14th Australasian Port and Harbour Conference
Subtitle of host publicationSydney, Australia; 11-13 September 2013
Place of PublicationBarton ACT Australia
PublisherEngineers Australia
Number of pages6
ISBN (Electronic)9781922107053
ISBN (Print)9781510808454
Publication statusPublished - 2013
EventAustralasian Coastal and Ocean Engineering Conference and Australasian Port and Harbour Conference 2013 - Sydney, Australia
Duration: 11 Sept 201313 Sept 2013
Conference number: 21st/14th


ConferenceAustralasian Coastal and Ocean Engineering Conference and Australasian Port and Harbour Conference 2013
Abbreviated titleCOASTS/PORTS 2013


  • Environmental flow
  • Estuaries
  • Inlet
  • Scour.
  • Snowy River

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