How is spillable water calculated?
Until the low risk of spill declaration is made, any allocation and carryover greater than 100 per cent of your total (including high and low reliability) linked water shares is quarantined in your spillable water account.
Every customer’s circumstances are different. You can use the Victorian Water Register’s Carryover Calculator to help understand how carryover might fit into your farm planning.
The calculator provides a general indication of:
- How much water you could access from the start of the season - and how much may be quarantined in your spillable water account.
- How new season allocations might impact on your allocation account and spillable water account balances.
- The fees that may apply if all the water in your spillable water account transfers into your allocation account after the declaration.
Spillable water account charges only apply to water that is returned to your allocation account after a declaration is made.
Any carryover and allocation volumes up to 100 per cent of your total linked water shares and recorded in the available balance of your allocation account are already covered by your Fixed Entitlement Storage fees.
The example below shows the Carryover Calculator being used for a farm with 200 ML of high reliability water shares that has 100 per cent allocation, and 100 ML of low reliability water shares that has 72 per cent allocation.
The farmer carried over 100 ML against their low reliability at the start of the season. Five per cent of carryover was lost due to evaporation, bringing the total carryover volume down to 95 ML.
In summary, 300 ML remains available to this farmer, but 67 ML has been transferred into a spillable water account and as a result is subject to spill if Hume Dam spills occur this season.
GMW reference: A4343928