A HYDROLOGIST says the waterways around the area cordoned off for the search for Daniel Morcombe's body are prone to strong flows and sediment movement.
Up to 50 SES workers, sourced mostly from the Sunshine Coast and backed by 25 police officers, yesterday trawled a small area of Coochin Ck.
It is beyond where they started, but according to police it is an “extension” of that original search area.
The officers were a combination of specialist investigators and uniform officers.
These crews were further backed up by four police divers and five who specialise in forensics.
Engineering hydrologist from the University of the Sunshine Coast Mark Porter said waterways in the area had regular stream flows.
“You would get fairly frequent flows with storm events, because of high and reliable rainfall,” he said.
“The flows and floods in January would have shifted a lot of sediment.
“In the big events you can expect the topography to change a bit.”
Although the search site buzzed through the day, it was the work being done on a simple shoe that drew attention.
Away from the Glasshouse Mountains search area, in the Forensic and Scientific Services in Coopers Plains, Daniel Morcombe's DNA is being drawn into the light.
Police investigators took samples of the lost 13-year-old's DNA, with a goal of one day linking it to his abductor.
At the time, a fingerprint expert examined Daniel's room to develop a full set of prints for the missing boy.
During the inquest held earlier this year, police said if Daniel's burial site was ever unearthed, this DNA could provide concrete proof of a discovery.
Police found several pieces of evidence when they searched the spot where he was last seen.
These included three tyre tracks and five partial shoeprints.
Three of the shoe impressions were believed to be prints from Daniel.
The other two are suspected to have been left by a Colorado boot.
So far there is no indication of the type of shoe found through the investigation.