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Outback Queensland, NSW comes to life as riverine flooding arrives without rain

The brown water of the latest flood is beginning to flow into Angledool Lake in north west New South Wales.  (Supplied: Rory Treweeke)

There isn't a cloud in sight, and it hasn't rained, but the incoming flood is imminent.

This is floodplain country, where it doesn't have to rain to go under.

Rory Treweek's Angledool station is situated on the Narran River, which is part of the Condamine-Balonne system and one of the largest catchments in the Murray Darling Basin.

Heavy falls at the headwaters on Queensland's Southern Downs take nearly a month to reach his property.

Plenty of time to move stock to higher ground, then sit back and wait.

"The term that we tend to use for it is 'beneficial inundation'," Mr Treweeke said.

"Floods are just part and parcel of what this country is.

Rory Treweeke from Angledool Station said he'd rather play in mud than dust.  (Supplied: Rory Treweeke)

Environment brought to life

While floods can cause devastation, the inflow of water from upstream breathes life into the environment and replenishes a diverse range of flora and fauna.

The floodwaters that pass Mr Treweek's property will flow into the Narran Lakes in north west New South Wales, one of the most important waterbird breeding sites in Australia with more than 50,000 nests found during previous floods.

It has also been a significant meeting place for Yuwaalaraay, Kamilaroi, Muruwari and Kooma people.

Yuwaalaraay and Kamilaroi man Jason Wilson's voice lights up when he speaks about the flooding rivers and lakes.

"There's so much joy, so much happiness and relief that these rivers are all flowing," Mr Wilson said.

This part of the Narran Lakes is also called Dharriwaa, meaning 'meeting place'. (Supplied: Jason Wilson)

Land 'like a supermarket'

Floodwaters like these have bought life to Mr Wilson's culture for thousands of years, particularly in the Narran Lakes or Dharriwaa where Aboriginal people met and used the abundance of food.

Yellowbelly perch, yabbies, lignum and pig face are just some items on the menu.

"When that floodplain gets flooded, it's like a supermarket," Mr Wilson said.

"We've been eating on these flows for a long period of time, over thousands of years.

"It's a tremendous time, it's a rebound from the really tough times that we had."

Riverine flooding means water covers the surrounding land after rivers break their banks.  (Supplied: Jeremy Hill)

What's the science?

The two main types of flooding in southern Queensland are riverine and flash.

Riverine flooding comes from the bottom up, where rivers break their banks and water covers the surrounding land more than six hours after rainfall.

While these flood events are not unprecedented, the most significant difference this year is their prolonged nature.

Senior Meteorologist at the Bureau of Meteorology, Laura Boekel said this had changed the way the land responded.

"Locations like Goondiwindi have recorded over 15 separate flood events in the past 12 months, with several being major floods," she said.

"I really like to think of a catchment or the ground like a kitchen sponge.

"If catchments and the ground are really saturated [it] just means that they can't take any more water."

Green pastures

Rory Treweeke from Angledool Station said he's never seen so much feed on the country.  (Supplied: Rory Treweeke)

Graziers like Mr Treweeke are still getting used to the welcome sight of green pastures.

"You can't see the fence lines, the cattle have been absolutely loving it.

"It's always been recognised as being very productive country because it does flood."

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