The bodies of the four Dreamworld victims have been returned to their families.

Nearly a week following the tragic accident at Dreamworld on the Gold Coast, the bodies of the four victims have been returned to their families.

According to The Courier Mail, autopsies on Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozbeh Araghi were finalised by the coroner and their bodies repatriated over the weekend, allowing their loved ones to finally begin making funeral arrangements.

The four adults were killed on the theme park’s Thunder River Rapids ride, when their raft flipped shortly after 2pm on Tuesday afternoon.

Two children, believed to be Low’s 10-year-old son and Goodchild’s 12-year-old daughter, miraculously survived the accident.

Cindy Low, Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozbeh Araghi.

Dreamworld staff will begin to voluntarily return to work today, but the park's bosses say the gates will remain shut to the public until after the victim's funerals have been held.

“We are continuing to co-operate and assist the authorities with their investigation,” Dreamworld chief executive Craig Davidson said, according to ABC.

“I’d like to reiterate our hearts and thoughts are with the families of those affected by this tragedy.”

Meanwhile, Dreamworld's owner, Ardent Leisure, yesterday appointed disaster recovery expert Mike McKay to work with the victim's families, theme park employees, authorities and the broader Gold Coast community in the wake of the tragedy.

McKay was integral in dealing with the aftermath of Cyclone Larry in 2006 and the Grantham flood disaster in 2011, and his appointment came at the recommendation of Queensland Police Commissioner Ian Stewart.

"We appreciate that we need to show the world, and it is an international situation, that this is going to be a safe and happy and comfortable place for them to come back to," McKay said.

Investigations into the accident are ongoing.