Additional trees to help improve bank
SEQWATER will improve water quality in the Upper Brisbane River by stabilising an eroding riverbank by planting more than 28,000 trees.
Sediment from the eroding riverbank, located in Cressbrook, has been affecting the quality of water reaching Wivenhoe Dam, the region’s largest drinking water storage.
Seqwater chief executive officer Peter Dennis said by stabilising and revegetating the riverbank, water quality would be improved and ultimately protect the water supply to the community.
“The state of our catchments has a major impact on the quality of water we treat,” Mr Dennis said.
“The presence of sediments can impact our reservoir capacity and affect water quality at our intakes, potentially forcing water treatment plants to temporarily close.
“It’s important that we take steps to improve the condition of our waterways to protect south-east Queensland’s water supply.”
The project to stabilise the eroding bank began this month and is taking place on two neighbouring properties.
Mr Dennis said Seqwater was working closely with the landowner’s two lessees and expected the project to be completed in four months.
The project will involve battering the bank, a process that reduces the steepness of the bank to make it more stable. Rocks will be installed at both sites, as well as timber piles at one of the sites.
These will protect the bank from high velocity flows in future rain events.
Once planted, the trees will establish a root network which will help hold the soil in place and prevent further erosion.
The trees will be maintained for three years to become established.