Gnangara levels reveal four year stabilisation and recovery
Released 20 Oct 2009
Monitoring by the Department of Water reveals the groundwater system's levels have reached the peak of the annual recharge cycle higher than at any other time since October 2005.
"Given there has been variable rainfall over that time this shows us that our management decisions are not only sound but are having an impact," the department's Director Water Resource Use Rob Hammond said.
The improved levels arrive after another year of sustained efficiency efforts led by the department and the state government including a trial winter sprinkler ban and continued implementation of water conservation plans with large users such as local government.
"Consistent efforts to reduce consumption have contributed significantly to this very important stabilisation and recovery of the groundwater system's health," Mr Hammond said.
Water levels across the Gnangara mound generally peak in October, after the end of the winter rains. Groundwater levels are typically lowest around April but can vary.
Mr Hammond said the extensive monitoring program created and managed by the department has been vital in informing the management decisions.
Water Minister Dr Graham Jacobs recently announced that due to the improved dam levels and the reduced consumption the draw on Gnangara by the Water Corporation will be reduced for the 2009-10 year.
The Minister has proposed an abstraction limit for the Gnangara and Jandakot mounds for 2009-2010 of 120 GL, of which approximately 110 GL will come from Gnangara - a decrease of about 27 GL from 2008-09.
Mr Hammond said efficiency and conservation measures would continue.
"We are working with industry to become more efficient but we also need domestic bore users to continue to help by only using bores when necessary, even on rostered days," he said.
Contact: Peter Collins
Phone: (08) 6364 6848 / 0434 603 441