Carryover simulators
Download a copy of the 2011/12 season carryover brochure
G-MW has developed an extensive guide to understanding carryover for the Goulburn, Broken, Campaspe, Loddon, Bullarook and Murray regulated river systems. See the information below or download the carryover brochure to help plan your carryover for the 2011/12 season
Carryover Brochure
Quick Links
1. Goulburn, Murray and Campaspe Systems
2. Broken, Loddon and Bullarook Systems
Carryover - Goulburn, Murray and Campaspe Systems
Carryover did not exist the last time our region had similar volumes of water yet to be delivered, full storages and a positive new season outlook. The following update for Goulburn, Campaspe and Murray system customers is the first in a series that will help you to plan your water use, carryover and trade over the remainder of this season and into 2011/12.
Some definitions
Carryover is a risk management tool that can allow you to ensure water supplies at the start of the season before there is an allocation and to supplement your seasonal allocations.
Spillable Water Account (SWA) Until the declaration or spill, a SWA quarantines any allocation and carryover greater than 100% of your total (high and low reliability) linked water shares.
Declaration is made by the Resources Manager at a point in the season when the Manager determines there is a low risk of the storages spilling. If you had water in a SWA the declaration triggers the transfer of your SWA water into your ABA for use and trade.
Linked ABA Water you want to carryover must be in an Allocation Bank Account (ABA) linked to a water share, limited term transfer of a water share or supply-by-agreement. Water that is not in a linked ABA is not eligible for carryover.
HRWS High Reliability water share.
LRWS Low Reliability water share.
How much water can I carryover?
All the allocation in your linked ABA on 30 June 2011 is eligible for carryover - there is no maximum.
How much water can I trade or use at the start of the season?
From the start of the 2011 season (July) you can immediately access all the carryover and allocation that is recorded in the available balance of your Allocation Bank Account. Any carryover and allocations quarantined in your spillable water account cannot be used or traded until a declaration is made.
You can also access any allocation traded into your account since 1 July 2011.
Does all my carryover go into a Spillable Water Account (SWA)?
No. Only volumes greater than 100% of your total water shares (LRWS and HRWS) go into a SWA. The water in the SWA is identified as yours but you cannot use or trade the water until there is a declaration.
When can I access the water in my Spillable Water Account?
The water in your SWA will become available for trade or use once the declaration is made.
What if G-MW makes an allocation(s) before the declaration is made?
The volume allocated to your ABA is added to your carryover balance from the start of the 2011 season and any volumes in excess of 100% of your HRWS and LRWS will be credited to your SWA.
How much water will I lose if the storages spill?
A spill has no impact on the volumes available for trade or use in your ABA. Once allocation is placed in your ABA, it stays there until used or traded. If there is a spill before the declaration is made, the volume of the spill is reduced from all SWA balances in proportion. It's a bit like an allocation, except all SWAs are reduced by the same percentage. If there is a major spill it is possible that all SWAs may be reduced to zero.
Which storages count as a spill?
Campaspe system - Lake Eppalock,
Murray System - Dartmouth Dam
Goulburn System - Lake Eildon
Spills at other storages in your system have no impact on your SWA volume.
If I carry over 100% and then use or trade allocation before the declaration/spill, can I top up my ABA balance from my SWA or with current season allocation?
No. Until the declaration/spill you can only use or trade the volume available in your ABA.
If G-MW pre-releases water to prevent spills does this affect my carryover?
If G-MW has to make pre-releases to provide flood mitigation, the released volume is treated as a spill and is proportionally deducted from your SWA.
Pre-releases do not affect the volumes in your ABA.
When will G-MW make the declaration?
To make the declaration, G-MW will assess current volumes in store, forecast inflows and expected releases. If the Resource Manager determines there is a low risk (less than 10% probability) of the storage spilling before December then the declaration can be made. If the Resources Manager determines there is a greater than 10% risk of the storages spilling, the declaration cannot be made. This process will continue until either the storage spills or the risk declines to a low level.
For this reason, the declaration is entirely dependent on seasonal conditions. G-MW will endeavor to make the declaration as early as possible in the season, but it is possible the declaration may not be made until November at the end of the traditional peak inflow period.
What happens if the storage spills after the declaration has been made?
Once the declaration has been made, all of your allocation is available in your ABA and a later spill has no impact on the volume in your ABA.
Will I be charged for carryover held in the SWA?
Yes. A volumetric charge applies to each megalitre that is transferred OUT of your SWA into your ABA after the declaration is made. If there is a major spill (before a declaration) and all SWAs are set to zero then you will not incur any fees. The revenue generated from SWA fees funds operations and maintenance of the storages and offset revenue recovered from customers' entitlement storage fees.
Proposed 2011/12 Fees
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System
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Goulburn
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Campaspe
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Murray
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$/ML transferred from SWA into ABA
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$3.52
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$17.03
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$4.52
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Carryover - Broken, Loddon and Bullarook Systems
With 44 GL of water available for use, trade or carryover on the Loddon, Broken and Bullarook systems, G-MW is encouraging customers to refresh their understanding of the carryover rules that apply for these systems, and to seek further advice to ensure they are fully informed before making decisions. G-MW staff can provide details of customers Allocation Bank Account (ABA) balances and their volume of entitlement, however they cannot advise customers on what is best for their individual circumstances. During May and June G-MW will endeavour to notify ABA owners if their ABA balance is greater than the allowed carryover amount and they are at risk of water being lost on 30 June 2011.
Is your water in a linked ABA?
To carry over your unused allocation it must be held in an ABA that is linked to a water share, a supply by agreement, or a limited term transfer of a water share linked ABA. You cannot carry over allocation against a limited term transfer if it expires this season, that is, before 1
July 2011.
How much water can I carry over?
You can carry over a maximum volume equivalent to 50% of your high reliability water shares (HRWS) and 50% of your low reliability water shares (LRWS).
Do I need to apply for carry over?
No, unused 2010/11 allocation in a linked ABA at 30 June 2011 will automatically carry over to the 2011/12 season, as follows:
• Your unused allocation will first be carried over and recorded against your HRWS - up to 50% of your HRWS.
• Any additional unused allocation will then be carried over and recorded against your LRWS - up to 50% of your LRWS.
Before the end of the 2010/11 year, any allocation you intend to carry over must be in a linked ABA.
I have more water than I can carry over, what can I do with it?
If you want to carry over more water than equivalent to 50% of your HRWS and 50% of your LRWS, you may transfer the extra allocation to another linked ABA. Alternatively you can use or sell this excess water before the end of the 2010/11 season.
Unused allocation that is not carried over by individual customers will be written off from the ABA and returned to the pool to meet needs for the 2011/12 season - including new season allocations.
How much water can I access at the start of the season?
You can access your carryover from 1 July 2011. 5% will be deducted from your carryover volume to cover evaporation losses. For example, if you carry over 100 ML you will have 95 ML at the start of the 2011/12 season.
Will new season allocation affect my carryover?
If, during the course of next season, the sum of your HRWS carryover (as at 1 July 2011) and 2011/12 HRWS allocation reaches 100% of your HRWS volume, you will not receive any further 2011/12 HRWS allocation.
The point at which you will stop receiving further allocation will not change if you sell or use allocation, or sell entitlement during the 2011/12 season.
For example, if you carry over the equivalent of 50% of your HRWS, you will start the 2011/12 season with 47.5% after the 5% evaporation allowance is deducted. Once the 2011/12 HRWS allocation reaches 52.5% you will not receive further HRWS allocation improvements for the remainder of the 2011/12 season.
The same principle applies to LRWS carryover.
Can I trade my carryover?
From July 2011, you can trade the allocation you have carried over, or purchase allocation someone else has carried over.