Some of the country's top scientists have today told an inquiry into the Murray Darling Basin Authority's draft plan the plan won't cover future droughts and doesn't give South Australians water security, the Australian Greens said.

"The Wentworth Group of Concerned Scientists explained the current draft plan does nothing to help users prepare for the next drought," Greens' water & Murray Darling Basin spokesperson, Sen. Sarah Hanson-Young, said.

The Australian Greens have sent their submission to the Murray Darling Basin Authority, urging it ensure the final plan respects the best available science and is legal under the Water Act 2007.

"The draft plan fails the river and the community by ignoring the views of some of Australia's top scientists including the CSIRO, Goyder Institute and Wentworth Group," Greens' water spokesperson, Sen. Sarah Hanson-Young, said.

Audio of Sarah's Adelaide door stop on Greens' submission to Murray Darling Basin Authority.

The Federal Government must heed the advice of Australia's top scientists if the plan to save the Murray Darling river system is to achieve its purpose and have longevity, the Australian Greens said today.

"Our top scientists are concerned about the negative consequences of extraordinary increases in groundwater extractions included in the draft plan, as are the Greens," Greens' water spokesperson, Sarah Hanson-Young, said.