ROCKHAMPTON is preparing for what could be its worst-ever flooding following ex-tropical Cyclone Debbie.
Queensland Regional Hydrology Manager Victoria Dodds said flooding is expected to continue for several days as the floodwaters make their way through rivers and streams.
"There has been a significant amount of rainfall in southeast Queensland, with some areas receiving rainfall in a similar range to those last seen with ex-tropical Cyclone Oswald in 2013."
Flooding is expected for the Connors, Issac, Mackenzie and Fitzroy Rivers in the Capricornia region as well as the Logan and Albert River catchments in the state's southeast, with levels in the Logan River at their highest since 1974.
Ms Dodds said Rockhampton is expected to reach the major flood level of 8.5m on Monday afternoon and peak between nine and 9.4 metres on Wednesday.
"The flood peak in Rockhampton could be higher than January 2011 and may even reach the February 1954 level (of 9.4 metres)," she said.
Major roads in the region are expected to be cut by the flooding.
Road Safety Minister Mark Bailey said the Yeppen Floodplain traffic transition plan is expected to be activated Monday afternoon.
"This means both north and southbound traffic on the Bruce Highway south of Rockhampton will use the Yeppen South and North Bridges," Mr Bailey said.