The man was found in Ross Lagoon in the small locality of Taylorville, near Waikerie, at around 2.15pm on Sunday.

The lagoon is near the Murray River, not far from local businesses.

The body was located by police, members of the Country Fire Service and State Emergency Service.

It has not yet been identified.

Nearby roads were closed on Sunday afternoon as Murray Mallee Police and detectives investigated the man’s death.

Anyone with information is asked to contact Crime Stoppers on 1800 333 000.

It comes as River Murray floodwaters in the Riverland are set to hit a first high peak of between 185GL and 190GL this week.

The peak comes ahead of flows which are likely to reach between 190GL and 220GL around Christmas and New Year.

The floodwaters had already prompted local health authorities to evacuate 21 vulnerable aged care residents out of Renmark Paringa District Hospital last week.

Chief public health officer Nicola Spurrier today said another 30 residents in the hospital were being moved to a higher level in the facility as a precaution.

“What the [Riverland Mallee Coorong Local Health Network] CEO Wayne Champion has done in that facility is look at the other residents that are there… there are 30 residents that are below the level of the maximum height,” Spurrier told ABC Radio.

“We just want to get them up to higher ground basically.

“There’s hospital beds and there’s also some additional aged care beds which are on that higher area of the hospital.

“So from today there’s 30 residents – we’re just basically going to shift their rooms, they’ll be shifted to a different room but at the same Renmark hospital facility.”

A total of 4000 properties along the River Murray could be inundated by the end of the River Murray flood event.

Emergency Services Minister Joe Szakacs said the 220GL projection remained an “absolute high” according to the modelling provided to the state government.

“The modelling that we’ve received now that has been consistent for a number of weeks does put us in that range that flows will be somewhere at the absolute high about 220 gigalitres, down to around 190[GL] at more assuredness,” Szakacs told ABC Radio.

“The assuredness that I have, and that I want to reiterate to your community is that the modelling has been consistent now for a number of weeks.

“We don’t have large rain or La Nina-influenced events happening through our system, which is another cause for comfort.

“And the preparation that we are making… are well within the shoulders of these flows that we’re projecting.”

-With AAP