Ground shaking potential relating to eastern Australian active faults: an example from the Bendigo Region with relevance to water reservoirs and tailings dams  


Authors / CoAuthors

Clark, D.J. | Stephenson, J. | Allen, T.

Abstract

We present earthquake ground motions based upon a paleoseismically-validated characteristic earthquake scenario for the ~ 48 km-long Avonmore scarp, which overlies the Meadow Valley Fault, east of Bendigo, Victoria. The results from the moment magnitude MW 7.1 scenario earthquake indicate that ground motions are sufficient to be of concern to nearby mining and water infrastructure. Specifically, the estimated median peak ground acceleration (PGA) exceeds 0.5 g to more than ~ 10 km from the source fault, and a 0.09 g PGA liquefaction threshold is exceeded out to approximately 50-70 kilometres. Liquefaction of susceptible materials, such as mine tailings, may occur to much greater distances. Our study underscores the importance of identifying and characterising potentially active faults in proximity to high failure-consequence dams, including mine tailings dams, particularly in light of the requirement to manage tailing dams for a prolonged period after mine closure. Paper presented at Australian National Committee on Large Dams (ANCOLD) conference 2020, online. (https://leishman.eventsair.com/ancold-2020-online/)

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document

eCat Id

144081

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Commonwealth of Australia (Geoscience Australia)  
Cnr Jerrabomberra Ave and Hindmarsh Dr GPO Box 378
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Keywords

theme.ANZRC Fields of Research.rdf
  • Earthquake EngineeringEARTH SCIENCES
  • earthquake geology
  • seismic hazard
  • liquefaction hazard
  • Published_External

Publication Date

2023-11-01T01:07:27

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Australian Government Security ClassificationSystem    

Classification - unclassified

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Creative Commons Attribution 4.0 International Licence    

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completed

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Paper for Australian National Committee on Large Dams (ANCOLD) conference 2020

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asNeeded

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geoscientificInformation

Series Information

Australian National Committee on Large Dams (ANCOLD) conference 2-13 November 2020, Online

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Paper for Australian National Committee on Large Dams (ANCOLD) conference 2020

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[-44.00, -9.00, 112.00, 154.00]

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Spatial Resolution

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