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35. Drouin West - Tarago River Confined Flood Plain

This information has been developed from one or more of these publications:

  • Sites of Geological and Geomorphological Significance in the Westernport Bay Catchment (1984) by Neville Rosengren.
  • Sites of Geological and Geomorphological Significance in the Western Region of Melbourne (1986) by Neville Rosengren
  • Sites of Geological and Geomorphological Significance on the Coast of Port Phillip Bay (1988) by Neville Rosengren.
  • Sites of Environmental Significance in the Flood Plain of the Upper Yarra Valley Region (1983) by Neville Rosengren, Douglas Frood and Kim Lowe (as part of a study of Sites of Environmental Significance by the University of Melbourne for the then Upper Yarra Valley and Dandenong Ranges Authority).
Geological heritage sites, including sites of geomorphological interest and volcanic heritage sites, are under regular revision by the Geological Society of Australia, especially in the assessment of significance and values. Reference should be made to the most recent reports. See the Earth Science Heritage section of the Geological Society of Australia website (external link) for details of geological heritage reports, and a bibliography.


Location:
Labertouche - 996838. Tarago river 1.5 kilometres east of Drouin West.

Access:
Old Sale Road and Stocks Road.

Ownership:
Crown Land (Public Land Water Frontage Reserve) and Private Land.

Geomorphology:
The flood plain of the Tarago River is here confined in a valley cut in sedimentary beds of the Walhalla Group. The flood plain is 400 metres wide and the Tarago has incised a channel to a depth averaging 5 metres, thus creating a bordering terrace. On this terrace are depressions marking former higher level channels of the river. On the northern valley slope are old landslips.

Significance:
Regional. The site is an example of a confined flood plain and is of interest as a monitoring site to assess recent changes in channel morphology and the impact of these changes on the adjacent valley slopes.

Management:
Class 2. Subdivision should not be permitted on the area of the site and straightening or realignment of the river channel should not be permitted.
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