The National Capital Authority has announced they’re installing solar powered water circulators into Lake Burley Griffin tomorrow which we understand will be the brightly named Solarbees we looked at in June.
“There’s strong scientific evidence that water circulators can help reduce the intensity of blue-green algae blooms.”
“The nutrient that comes down the river is in a bound form, which blue-green algae cannot readily access. When it hits stratified water it becomes unbound. The water circulators will interrupt the stratification of the water in the lake, so the nutrient can stay bound.”
Two sites have been selected for the trial – one on the river, and the other a lake basin. Each circulator site will be paired with another untreated site with similar characteristics, so there is scientific comparison of the water quality testing results.
“The first water circulator will be installed in Molonglo Reach, with a control site upstream on the Molonglo River,” Mr Rake said.
“The second will be installed near the swimming beach at Yarralumla Bay, and it will be paired with a site in Orana Bay for testing.”
If the trial is successful, the NCA will consider the installation of more units throughout the lake
The first year of the trial, with the two units, will cost $350,000.