The perceived wisdom that drought and a closed Murray Darling system is the new normal continues to be challenged by reality. From my reckoning and the following graph of the Murray river flow rate at lock one, the closest proxy of what is flowing to the sea from the system, 15,000 GigaLitres (or 30 Sydney Harbours) of fresh water has flowed to the sea since September 2010.
This link to see more live river data flows if you are interested.
I had predicted at around January that more water would flow out of the mouth than the total official storage of the whole of the Murray Darling before it stopped again. The total official storage is around 22,000 GL so I could yet be right. I figure that one more year of this kind of thing and we will be wanting to redact our thinking and declare that (the 10 years from 2000 to 2010) was just a freak drought the likes of which we would never see again in our lifetime. It is plausible that we may want to keep strategic dams along the Murray at half capacity to hedge our bets with catastrophic lower Murray floods now possible if we get a repeat of the inflows of last year. Namely the Menindee lakes, Hume and Lake Victoria could moderate catastrophic inflows to just the major flood mark at Renmark and below if they are pre-emptively emptied.