admin /6 October, 2006
Karlene Maywald, South Australia’s Minister for the River Murray, says the new $11 million Bookpurnong Salt Interception Scheme is a step toward "salt-proofing" the Murray and such schemes could be linked to promising saline aquaculture in the future.
Anti-salt project took 10 years: Maywald told state parliament the Bookpurnong project between Loxton and Berri, launched on 14/9/2006, had been 10 years in the making, with extensive community consultation and hydrogeological testing and "is the next step in salt-proofing the Murray River in South Australia," she said.
Will block 110 tonnes a day: "The Bookpurnong scheme will initially stop 50 tonnes of salt a day from entering the river—more than an Olympic size swimming pool a day. By 2035 this will rise to 110 tonnes of salt a day," Maywald said.
Proof of community spirit: It was initiated by the local community, alerted to the risks of salinity damage, and 16 enterprises worked together over 10 years to achieve the interception scheme, she said. Funds came from the SA and commonwealth governments under the National Action Plan for Salinity and Water Quality, and the Murray-Darling Basin Commission. Bookpurnong joins similar schemes in operation at Waikerie, Woolpunda and Qualco.
All that salt may be useful: Meanwhile, Maywald said groundbreaking research had the potential to turn a waste stream of saline groundwater from salt interception schemes into the basis of a new industry.
Promise in inland fish culture: The new Waikerie Inland Saline Aquaculture Centre, a research and development demonstration centre initiated by the South Australian Research and Development Institute (SARDI), could kick-start a $20-million-a-year inland aquaculture industry in the Riverland, Maywald said.
Innovative use of waste water: "This three-year project, also funded by the state and commonwealth governments through the National Action Plan for Salinity and Water Quality, has captured the imagination of funding bodies because of its innovation in using saline groundwater from salt interception schemes to grow mulloway and, down the track, other aquatic species.
Disposal costs $2m a year: "The saline groundwater which currently has no real use is pumped away from the River Murray in the Waikerie region to the Stockyard Plain Disposal Basin at the rate of 30 million litres a day at a cost of $2 million a year," the minister said.
Fish parks to link with salt schemes: "In a few years time, we could see aquaculture parks aligned to salt interception schemes in the Riverland that would be capable of producing enough mulloway to satisfy both the state and national markets with opportunities for export of wine and fish from the region."
Double research focus: The research would provide information on costs of production, feasibility and potential for commercial operators and private-sector investment in inland aquaculture. The centre would also study bioconcentration of water — using biological systems to concentrate the salt and reduce the amount of water needing disposal.
Aim to cut saline water disposal: "Reducing the amount of water being pumped into disposal basins may extend their life and lessen the need for another disposal basin in the area—another desirable outcome," Maywald said.
Reference: Parliament of South Australia. House of Assembly. Wednesday 20 September 2006. Murray River Projects. http://www.parliament.SA.gov.au/catalog/hansard/2006/ha/wh200906.ha.htm
Erisk Net, 4/10/2006