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The optimisation study of the operation of Wivenhoe Dam
The Queensland Flood Commission of Inquiry (2011) recommended that a full and proper technical review be conducted of the Wivenhoe Manual for the flood operations of Wivenhoe Dam to include a study of what the 'best' rainfall forecast meant, how the forecasts were to be used, and their reliability. The Optimisations Study (WSDOS) was to be that technical review.
The control of floods through Wivenhoe Dam is representative of the generic challenges posed by gated, combined water supply and flood mitigation dams that are vulnerable to overtopping and dam break. The 2009 Manual operating rules were one of the measures adopted to reduce the risk of Wivenhoe being breached or overtopped by a large flood.
This paper evaluates this Optimisation Study, and maps the differences between the operations framework advocated by WSDOS, versus the 2009 Manual (Revision 7). WSDOS favoured Seqwater's 2013 Manual (Revision 11).
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