This page shows you where your temp water can be traded to and from. The following is a schematic diagram of trading opportunities in the Southern Murray-Darling Basin. The figures in the chart are updated every few hours to show the maximum volume that can be traded between trading zones. Trade within a zone is unlimited.
If the numbers don’t line up, try widening your browser.
1 GL = 1 000 ML
105 GL†-5 GL†2.14 GL131 GL5.01 GL5.01 GL5.01 GL161 GL2.27 GL4.53 GL4.53 GL2.70 GL5.01 GL175 GL0.00 GL161 GL0.28 GL1.50 GL
† See Murrumbidgee-Murray note.
‡ No limit only if the buyer is on the Murray.
This should be taken only as a guide as there may be other factors affecting your trade.
You might also be interested in this static chart showing all the pieces of infrastructure.
The diagram gets a bit complicated with trade to and from zone 1A. Northern Victoria has channels from the Goulburn River that reach other valleys:
Zone 1B is in the Loddon Valley and trade to and from zone 1A is not limited. Along the Campaspe, trade between 4A and 4C is not limited. Trade from either 4A or 4C to either 1A or 1B is not limited. However, trade from 1A or 1B to 4A or 4C is limited.
Up to 200 GL in a given year can be traded from these valleys to the Victorian Murray. Once it’s on the Murray it can be traded to SA or NSW (including the Murrumbidgee and Lower Darling). Net trade out of the Murray into these valleys isn’t possible.
Trade is not limited to the Murray (and Murrumbidgee and Lower Darling if it’s open.) If water is being traded to the other Northern Victorian valleys, it is limited by what can be traded between the 6B and 1A intersection.
The limit on the net volume of water that can be traded out of the Murrumbidgee to the Murray in a given water year is 100 GL. Net trade into the Murrumbidgee valley isn’t possible. However, once we reach the 100 GL limit, trade doesn’t reopen until 15 GL net is traded in.
Similarly, if trade into the Murrumbidgee closes because net trade drops to 0 GL, then trade from the Murray to Murrumbidgee doesn’t reopen until 15 GL net is traded out.
At Barmah on the Murray River, the river narrows, so this part of the river is called the Barmah Choke. On the banks is a river red gum forest that, while it does need flooding at certain times of year, shouldn’t be flooded at other times. To prevent flooding, there is a minimum volume of water that irrigators above the choke need to use.
When we reach the limit of the Barmah Choke restriction, water licence owners above the choke can’t trade to a water licence below the choke. However, trade in the reverse direction is still possible.
If Menindee Lakes falls below 480 GL, it comes under NSW control. When this occurs, trade to and from the Murray is closed. For the Lower Darling to return to MDBA control, Menindee Lakes has to then exceed 640 GL. Under MDBA control, temporary water can be traded into and out of the valley, as long as there is no net trade out of the valley (ie you can’t trade out until someone trades in.)
Trade out of NSW is limited to 200 GL or a volume that keeps the “risk of spill” to less than 50 %. The “risk of spill” is not just the risk of dams physically spilling, but also any other loss of water.