Coulburn-Murray Water manages more than 9 million megalitres of water across 16 storages

 
 
   
 
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Operating and maintaining 16 water storages across northern Victoria that can hold 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.

After a decade of drought moving into unprecedented rain and flooding in some parts of Victoria, we've been closely monitoring our storages not only for their ability to recover from these conditions but also the potential to deal with any additional rainfall experienced across the catchments.

While the primary role of our water storages is to harvest and store customers' water entitlements, GMW provides flood mitigation benefits 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.

Storage Status Update 

(Updated 9:00 AM, Friday 28 August 2015)

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 while releases above minimum flows are taking place at our gated spillway dams – see FAQs below for an explanation of pre-releases.

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

 

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

 Lake Eppalock Storage Projections

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 average customer use over the last 3 years
  • An average scenario assumes 75% of average customer use over the last 3 years.

Lake Eildon

Last updated: 24 August 2015

Lake Eildon Projections

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 2014/15

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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