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Operating and maintaining 16 water storages across northern Victoria that can cumulatively hold over 9,000,000 megalitres of water - or 70% of the total water storage capacity in Victoria - is an ongoing and major part of Goulburn-Murray Water's (GMW) business.

GMW closely monitors all storages, their inflow and downstream releases to ensure harvesting opportunities are maximised and stored water is managed efficiently for all our customers.

While the primary role of our water storages is to harvest and store customers' water entitlements, GMW can provide flood mitigation benefits at some storages where possible. Pre-releasing water from a GMW water storage can influence the rate at which a storage fills and is a valuable tool to balance entitlement reliability and flows downstream of a storage.

This webpage provides information on the status of current and forecast storage releases, information on inter-valley trade transfers and estimated storage volume projections for some storages. The links above provide more detaild data and information on river levels, storage releases and any flood warnings.

Storage Releases Summary 

(Updated 10:45 AM, Monday 26 September 2016)

This information covers the status of releases from the major storages managed by GMW. The forecast releases are an indication only and may change depending on weather conditions and customer requirements. Please check this information daily if your property is subject to inundation at high river levels.

Storage releases may change in response to inflows, weather forecasts and observed rainfall.  For real-time river levels please visit the Bureau of Meteorology River Levels website (see link above) or access GMW's Water Status Reports (see link above). 

  Loddon Storages

  Lake Buffalo

  Lake Nillahcootie

  Lake Eppalock

  Lake Eildon

  Goulburn Weir

Forecast Storage Volume Projections 

Climatic conditions, storage inflows and customer demands influence the volume of water held in storage throughout the year. Given the uncertainty surrounding each of these factors, exact information about future storage volumes cannot be provided or guaranteed.

Using the current storage volume, historical climate and inflow statistics, historic patterns of use and known commitments for releases in a season, storage projections under various climatic scenarios are possible.

It is important to note there are a number of underlying assumptions in the modelling used to develop the storage volume estimates and are subject to change at any time.

The storage projections are forecasts only; they are not a commitment by GMW to operate the storages to any particular scenario. The highly variable nature of climatic conditions, storage inflows and customer demands means the actual storage volume throughout the year will differ to the projections given here.

Storage volume estimates will be updated throughout the season.

Lake Eppalock

Last updated: 24 August 2015

 

Inter-Valley Trade transfers

(Last updated: 24 August 2016)

Transfer of inter-valley trade water is required to deliver water traded between different systems.

As at the date of this update, there has been no transfer of inter-valley trade water from the Goulburn, Campaspe, Loddon or Broken systems in season 2016/17. Transfers from the Goulburn to the Murray system are likely to commence in December 2016, with the potential for a total transfer volume of 120 GL to occur from December 2016 to March 2017.

The timing of transfers of inter-valley trade water is highly dependent on catchment conditions and system demands. Plans for transfers of water are subject to change at any time.

To view the details of the volumes of inter-valley transfer water in each system, please refer to the Victorian Water Register website.

Forecast Storage Volume Projections

Climatic conditions, storage inflows and customer demands influence the volume of water held in storage throughout the year. Given the uncertainty surrounding each of these factors, exact information about future storage volumes cannot be provided or guaranteed.

Using the current storage volume, historical climate and inflow statistics, historic patterns of use and known commitments for releases in a season, storage projections under various climatic scenarios are possible.

It is important to note there are a number of underlying assumptions in the modelling used to develop the storage volume estimates and are subject to change at any time.

The storage projections are forecasts only; they are not a commitment by GMW to operate the storages to any particular scenario. The highly variable nature of climatic conditions, storage inflows and customer demands means the actual storage volume throughout the year will differ to the projections given here.

Storage volume estimates will be updated throughout the season.

Lake Eppalock

Last updated: 22 September 2016

            

  Key notes:

  • Probability of exceedance (PoE) inflow percentages represents the inflow volumes that have a particular chance of being exceeded. For example the 90% PoE inflow scenario considers the storage inflow volume that has 90 chances in 100 of being exceeded - i.e. dry conditions.
  • A dry scenario assumes customer use similar to that in recent dry years with similar allocation availability.
  • An average scenario assumes customer use similar to last season.

Lake Eildon

Last updated: 1 September 2016

     

Key notes:

  • Probability of exceedance (PoE) inflow percentages represents the inflow volumes that have a particular chance of being exceeded. For example the 90% PoE inflow scenario considers the storage inflow volume that has 90 chances in 100 of being exceeded - i.e. dry conditions.
  • Demand is the average customer demand in the 10 years up to 2015/16

Dams - How they work

Ever wondered how a dam works? How is the water released and where does it go?

Our 3D animation is designed to show you what a dam looks like, the infrastructure, and challenges in managing water. It allows you to explore different parts of the dam with a slider that demonstrates the effect of changes in water levels.

Frequently Asked Questions

  Are there different types of dams and what are they?

  What is a pre-release?

  When do GMW undertake pre-releases?

  Don't pre-releases minimise the effects of flood on downstream users?

  Why not just release lots of water if we know it is going to rain?

  What role do GMW dams have in flood mitigation?

  How is water released from Eildon?

  What is a spillway and what does it do?

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