Monitoring program shows vital water source recharging
Released 04 Jul 2008
Results from the most extensive scientific measuring of Perth's major source of drinking water show that water levels are recovering from their lowest point since records were kept.
The Department of Water bore testing of the Gnangara mound – which supplies 60 per cent of the metropolitan area's drinking water – shows that some of April's record rainfall has made its way into the aquifer that sustains the needs of more than a million Western Australians.
The department's director of water resource use, Rob Hammond, said the levels are provided by monitoring of hundreds of bores between the Swan River and Gingin.
Following the release of the June monitoring figures today, Mr Hammond said lower than average rainfall over the last 10 years had resulted in an accumulated drop in levels.
He warned that although levels had begun to rise slightly, they were still overall quite low.
"'While it's good to see the monitoring graph turn upwards, it is important to reflect that we are only marginally better off than at this time last year," he said.
"Even if we have a wet winter we will still need to be vigilant and use water efficiently.
"The autumn rains mean everyone with watering systems from home gardens to pastures, should be switched off until at least spring.
"We need to give our precious groundwater systems a chance to store the maximum water so that it is sustainable for us to continue to draw on it in summer."
Mr Hammond said efficient use of groundwater was an important facet of the draft Gnangara groundwater areas management plan 2008, and the State water plan 2007.
The department was working with local governments, horticulturalists and garden bore owners to improve water use efficiency, and through the across agency Gnangara Sustainability Strategy looking at the long term future of the Mound.
Contact: Peter Collins
Phone: (08) 6364 6848 / 0434 603 441