TENDERS for water purchases Queensland's Lower Balonne close today.
Federal Water Minister Tony Burke announced the water purchases in three tenders last month, but did not announce a budget for the tenders.
The second tender will open in February next year and the third in April 2013.
Each be open for three weeks and are part of plans to buy up to $350 million of water in Queensland.
Mr Burke said water purchased in this tender would be used to improve the health of the rivers, wetlands and floodplains.
"(It) will complement our substantial investments in more efficient irrigation infrastructure in the Balonne and more broadly across the Basin," Mr Burke said.
The tenders are part of the Government's $3.1 billion Restoring the Balance in the Murray-Darling Basin program, under its Water for the Future Initiative.