Parts of Wagga Beach including the sand area and barbecue shelters have been under water over the past few weeks as the river rose to just under minor flood levels.

With water levels receding at the moment, it appeared the soft and saturated ground could have contributed to the gum tree falling.

"Council's tree maintenance team will be on site [on Monday] to assess this tree and other trees in the area," a Wagga City Council spokesperson said.

"Council will liaise with WaterNSW [which operates the state's major water supply dams]."

The Wiradjuri Trail walkway remains closed at Wagga Beach due to high water levels and the COVID-19 drive-through testing site at the nearby carpark was moved as a precaution.

A WaterNSW spokesperson said the organisation had procedures to "consider downstream impacts in any operational decisions" involving releasing water into rivers from full storage dams.

"To help get that balance right WaterNSW consults with stakeholders, including the Murrumbidgee airspace advisory panel, comprised of landholders, and agencies such as the Bureau, State Emergency Service (SES) and local councils," the spokesperson said.

WaterNSW has also decreased releases from Blowering Dam after the volume dropped to less than 96 per cent of capacity.

"Releases have fallen from a weekend rate of 10.5 gigalitres (GL) per day to 7.7 GL per day which will reduce downstream flows to within channel capacity at Tumut," a WaterNSW statement said.

"The decision has been taken in consultation with the local airspace advisory panel...an airspace target of 100 GL by the end of the week remains for the Blowering storage."

WaterNSW system operations executive manager Adrian Langdon said a break in the wet weather had allowed a slower rate of releases and reduced inundation downstream.

"We thank landholders downstream of the dam for their patience and encourage affected property owners to monitor advice on river heights," he said.

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