A RESPONSE to the Murray-Darling Basin Authority's draft plan by state MPs calls to keep the Murray Mouth open "100 per cent of the time".

The report by the Natural Resources Committee says 2750 gigalitres is not enough for a healthy river and calls for an allocation closer to 3200 gigalitres, AdelaideNow reports.

The report, tabled in Parliament yesterday, also calls for salinity and water height targets and further scientific modelling.

"The committee is firmly of the view that restoring the basin requires a plan that considers the system from the mouth up," the report says.

It states that, in its current form, the plan does not provide enough environmental water to meet the state's "social, economic, cultural and environmental needs".

The report blames uncertainty about the plan for constraining business investment in Murray-Darling Basin area in South Australia and says South Australian has "not received enough recognition" for past efforts to cap diversions.

The committee took evidence from 78 witnesses, 21 written submissions and three study trips to SA river communities.

Committee presiding member, Labor MP Steph Key, said the recommendations were realistic and achievable.

The report states there is "enough Commonwealth money on offer and there are enough willing sellers of water to ensure that a sustainable river system and sustainable river communities can become a reality".

Read more at AdelaideNow.