A claim that the Murray-Darling Basin Authority's latest revised plan fails to deliver 43% of its environmental targets.

And according to the Australian Conservation Foundation, it fails to deliver a healthy river.

The ACF told a Senate Committee also the plan fails to represent good and proper use of taxpayers' money.

River red gums, both young and old, along the Murray’s wetlands and floodplains are slowly coming good but there’s a long way to go.

A spokeswoman for the SA Murray-Darling Basin’s Natural Resources group says the trees are showing signs of recovery in response to recent high flow events.