Warnings not part of flood inquiry scope

Emergency flood warnings will not be assessed in the Maribyrnong River flood inquiry because it falls outside of Melbourne Water's remit, the organisation's managing director says.

The terms of reference, released after public submissions opened on Tuesday, states specific policy responses, future potential mitigation measures, overall emergency responses and flood recovery are outside of the scope of the inquiry.

Melbourne Water will instead look at the impact of the Flemington Racecourse levee and whether flood modelling needs to be approached differently in the future.

"What we're doing in this review is the critical first step," Melbourne Water's managing director Nerina Di Lorenzo told AAP.

"It would be very difficult to form a set of policy solutions or responses if the information and the review we're doing isn't done first."

More than 500 properties in Melbourne's inner west were inundated when the Maribyrnong River broke its banks on October 14 last year.

Dr Di Lorenzo said residents who were caught up in the floods should still share all concerns in their submissions, regardless of whether they fall outside of the inquiry's scope.

"Cover what needs to be covered," she said. "We will make sure information is shared with agencies.

"We can't speak for every agency but what Melbourne Water can do is provide this really important next step and make sure community voices are heard."

Hydrology and water resources expert Rory Nathan said it made sense to look first at the impact of the Flemington Racecourse flood wall before addressing any other questions.

"The prime cause of this problem is that there was a very large rainfall event and there was a flood," the University of Melbourne professor told AAP.

"The question of whether or not the flood wall made things worse is a very specific question that local householders have a right to understand.

"By having a narrow scope to the review, you'll get an answer more quickly."

Victorian minister Ingrid Stitt said the state government would look at the outcomes and recommendations from the inquiry when they were available.