There will be just under 20 gigalitres to trade from upstream to downstream of the Barmah Choke when the new water year kicks in.

Water licences could be used by international organisation to launder money under the nation's current foreign investment laws.

Opinion: NSW Deputy Premier John Barilaro says a meeting of the Murray-Darling Basin water ministers has been brought forward to address urgent water access issues.

That should be enough to keep the river going for the next 12 months.

The deluge on the east coast may have lulled some into thinking the drought was over, but in the Murray Darling Basin it is far from done.