The Deputy Premier has taken a swipe at US President Donald Trump while announcing an overhaul of the South Bank Parklands that will include a new lagoon.

Amanda Camm insisted the decision to step down was due to her health, but it followed a spate of highly publicised incidents.

The journalist became part of the story when he and a bystander swam out to free a driver from a sinking vehicle in the midst of flooding north of Brisbane.