Warragamba Dam overflows, with a major flood risk issued in Sydney’s west


Sydney’s biggest dam spills the equivalent of the HARBOUR in one day as rains continue to flood Australia’s east coast

  • Warragamba Dam has been heavily overflowing since Sunday due to rain fall
  • Peak spillage at the dam was more than the volume of water in Sydney Harbour
  • It has raised concerns over major flooding in the area and in western Sydney

Warragamba Dam in Sydney‘s south west has been spilling since the early hours of Sunday morning. 

The dam, which was already at high levels, began heavily overflowing due to the heavy downpour that battered Sydney over the weekend.

Warragamba Dam (pictured) has been heavily overflowing since Sunday. It is spilling around the equivalent of the volume of water found in Sydney Harbour on any given day

Warragamba Dam (pictured) has been heavily overflowing since Sunday. It is spilling around the equivalent of the volume of water found in Sydney Harbour on any given day 

It is now spilling water around the equivalent of the volume of water in Sydney Harbour on any given day, according to Water NSW.

The dam had an average spill rate of 240 gigalitres before reaching a peak of 515 gigalitres on Sunday afternoon, which is more than the 500 litres in Sydney Harbour.

That lowered to 380 gigalitres overnight as the dam continued to overflow on Monday.

Water NSW said in a statement: ‘The spill volume from Warragamba will be influenced by the rain received in the catchment today.’

‘All Water NSW major dams in the Sydney network continue to spill, but the rate is also receding.’

‘Downstream impacts will ultimately be a combination of the spill volume combined with downstream tributary flows.’

The high volume of spillage has raised concerns of potential flooding in the region as Sydney is hammered by heavy rain fall. (pictured, a Water NSW worker monitoring the dam November last year)

The high volume of spillage has raised concerns of potential flooding in the region as Sydney is hammered by heavy rain fall. (pictured, a Water NSW worker monitoring the dam November last year) 

Flooding may become an issue for regions surrounding Warragamba Dam and areas in Western Sydney as a result of the spillage. 

Weatherzone meteorologist Andrew Schmidt told Daily Mail Australia: ‘With all these dams at such high capacity before the rain occurred, major to moderate flooding is the obvious concern.’ 

Forecasters claim the heaviest rain fall from the wet weather event has already fallen across Sydney, with flooding now the main concern for the next few days.  

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