Queensland Premier Annastacia Palaszczuk has launched a second commission of inquiry into the deadly 2011 Grantham flood.

The inquiry into the flood that left twelve people dead will be chaired by Walter Sofronoff QC and will start gathering evidence immediately, Ms Palaszczuk has told State Parliament.

The new probe will focus on claims that the landscape, including the Grantham quarry, contributed to the flood.

It will also look at potential failings in earlier investigations, particularly in regard to the way eyewitness accounts were dealt with in the aftermath.

A report was commissioned earlier this year by News Corp media outlet The Australian, in which senior hydrologists suggested several inconsistencies with the original inquiry.

The Australian’s report found that a section of embankment that collapsed at the Grantham quarry was 260 metres long - not 55 metres as initially reported by the Queensland Floods Commission of Inquiry.

Ms Palaszczuk said it was worth another look.

“Residents of Grantham and their Mayor Steve Jones have been calling for this inquiry and we have been listening,” Ms Palaszczuk told the House.

“They are determined that the deaths of their friends and neighbours and family members on that day will not be in vain.

“The people of Grantham have suffered through an horrific, terrifying fatal event they deserve and require further closure.”

The inquiry will run from May 11, 2015 until August 31, 2015, enough time for new independent modelling to take place.

The consultation phase of the inquiry is expected to be limited to about two weeks, and there is no official word yet on any calls for public submissions.