Harnessing floodwater at Waterlea Walloon


18 Nov 2016 – Moreton Border News, Moreton QLD.

These maps clearly show the traditional water flow in peak periods and the harnessed flow that will set the scene for community areas at Waterlea Walloon.

AN ONGOING Stormwater Management Strategy being developed with local authorities to prevent flooding in the new Waterlea masterplanned community at Walloon and create a unique and safe rehabilitated waterway for the residents to enjoy.

Development Manager Andrew Cook said he is aware that there are concerns in the established Walloon community about how the water flow will be managed.

“We have the opportunity to reshape the new community in a way that innovatively adapts to the movement of floodwater.

“Protecting people’s lives, property and wellbeing have been, and will continue to be, a key priority for us,” he said.

Andrew explained that they have adopted an Integrated Water Management Strategy that has turned that natural flow of water into a key feature of the development.

Their Water Management Strategy will ensure that the home sites within the development remain flood free and that conditions downstream and upstream of the development are no worse than they were before the project.

“We’ve integrated high water management standards and environmental protection while providing multi recreational facilities and supporting the natural environment to rehabilitate local flora and fauna,” he said.

“Over the past four years the project team has worked collaboratively with Ipswich City Council to create a design to achieve those outcomes.”

He explained that this involves slightly raising the land either side of the waterway to bring the housing precincts above the high water line. The waterway that runs down the centre of the site will be rehabilitated to create a natural chain of ponds and interconnected recreational spaces for the residents and wider community to enjoy.

“We will be rehabilitating and enhancing the existing creek that flows through the estate to form small pools and wonderful community recreation spaces,” he said.

“What a lot of locals will be pleased to hear is that we will be replacing the existing undersized pipes beneath Karrabin Rosewood Road with more than 30 larger pipes to channel water under the road in peak flow times.”

He said the grazing land downstream from the development, on the opposite the side of the road will become part of the development to detain the water flows during the peak of storms, allowing it to disperse more gradually in the hours following.

“Once the works are complete flooding in the area, in particular Karrabin Rosewood Road, Rohl Road and Walloon State School, will be significantly reduced,” he said.

“We are very pleased with the final outcome that not only enhances the development in acetic and recreational aspects but also helps flood mitigation for the wider community in a way that is sustainable in the long term.”