Public hearings are set to continue in South Australia's Royal Commision into the Murray-Darling Basin with a scientific expert expected to tell of issues with the basin authority.
Former CSIRO research scientist Matthew Colloff will appear before the commission on Wednesday after presenting a written submission on his previous work on the ecological and economic benefits of environmental water in the river system.
That work included modelling the impact of various volumes of water to determine the most appropriate level to achieve particular outcomes, and then comparing that to modelling conducted by the basin authority.
Dr Colloff said he was unhappy with the extent of the authority's interference throughout the course of the project.
"In particular, with the way that I felt our scientific integrity was being compromised and independence undermined," he said in his written submission.
"We were being managed in such a way that our job became effectively a rubber-stamping of the Murray-Darling Basin Authority's findings."