A proposal for the construction of new levees could radically bolster Queensland's resistance to flooding disasters, which have cost the state's taxpayers more than $14.5 billion since 2009.

The cost of repairs and recovery work following the 2013 floods has surpassed $2.5 billion with most of that money going toward rebuilding local government infrastructure and repairing state-controlled roads. The repair bill from the 2012 floods added up to just over $2 billion, while the cost for the horrendous…