Picture: Lake Fyans

The latest seasonal allocations for November 2022 have been announced by the Storage Manager.

 

Inflow to reservoirs during October was approximately 465% of average, with the total volume in storage having increasing by around 127,500 megalitres since the October water allocation assessment. This has enabled a substantial increase to allocations, with all entitlements, except the Commonwealth Environmental entitlement, achieving full allocation. Wimmera-Mallee Pipeline Product entitlements increased from 60% to 100% this month. The Glenelg River Compensation Flow has increased from 4% allocation to 100%. The Recreation and Wetlands entitlements have both increased from 2% allocation to 100%. No allocation has been possible yet to Commonwealth Environmental entitlement.

 

A revised system reserve rule came into effect in August 2022. A total of 52,800 megalitres has been allocated to the system reserve. Details of the new reserve rule are available from the Storage Management Rules page.

Considering current catchment conditions and higher inflows, the Storage Manager is currently publishing updated storage level information on Mondays, Wednesdays and Fridays.

Please note that Monday and Friday updates are based on unverified telemetry data. The usual update on Wednesday will continue to be based on verified data from operator field reads.

Real time storage level telemetry data is publicly available for most of the headworks storages is available on the Victorian Government's Water Measurement Information System web page here. Please note that this data is also unverified and in some cases can be inaccurate to the actual level at the reservoir.

Lake Wartook storage is predicted to spill again due to expected rainfall over the next few days in the Grampians catchment area. Between Friday 7 and Monday 10 October, 1049 ML (3.6% of total supply volume) spilt from the reservoir.

Water levels at Lake Wartook peaked at 32,147 ML on Friday 7 October following steady rainfall. Since then storage levels have gradually reduced with controlled releases of up to 450 ML per day. Water releases will continue this week with up to 85 mm of rainfall expected across the catchment area on Wednesday and Thursday.

The Storage Manager is diverting water in as many different directions as possible.

For more information, click the following link: Lake Wartook - excess water update

 

The latest seasonal allocations for October 2022 have been announced by the Storage Manager.

 

Inflow to reservoirs during September was approximately 121% of average, with the total volume in storage having increasing by around 54,000 megalitres since the September water allocation assessment. This has enabled a substantial increase to allocations, with Wimmera-Mallee Pipeline Product entitlements increasing from 19% to 60% this month. Glenelg River Compensation Flow has received a 4% allocation, with Recreation and Wetlands entitlements both receiving a 2% allocation. No allocation has been possible yet to Commonwealth Environmental entitlements.

 

A revised system reserve rule came into effect in August 2022. A total of 20,000 megalitres has been allocated to the system reserve. Details of the new reserve rule are available from the Storage Management Rules page.

The Wimmera-Glenelg Headworks Storage Manager began releasing 300 megalitres of water from Lake Wartook into the MacKenzie River this morning in anticipation of the reservoir spilling.

For more information, click the followling link: Lake Wartook Q&A

 

The latest seasonal allocations for September 2022 have been announced by the Storage Manager.

 

Inflow to reservoirs during August was approximately 66% of average, with the total volume in storage having increasing by around 42,500 megalitres since the August water allocation assessment. This has supported an increase in allocation to Wimmera-Mallee Pipeline Product entitlements from 2% to 19% this month. No allocation has been possible yet to Glenelg River Compensation Flow, Recreation, Wetlands or Commonwealth Environmental entitlements.

 

A revised system reserve rule came into effect in August 2022. A total of 17,130 has been allocated to the system reserve. Details of the new reserve rule are available from the Storage Management Rules page.

The latest seasonal allocations for August 2022 have been announced by the Storage Manager.

 

Inflow to reservoirs during July was approximately 13% of average, with reservoirs increasing by around 6,000 ML since the July water resource assessment. This has been sufficient for a 2% allocation to be made to Wimmera-Mallee Pipeline Product entitlements this month. No allocation has been possible yet to Glenelg River Compensation Flow, Recreation, Wetlands or Commonwealth Environmental entitlements.

 

A revised system reserve rule came into effect this month, with 2,200 megalitres now in reserve. The revised rule shares the available water between entitlements and the system reserve as soon as allocations commence. Details of the new reserve rule are available from the Storage Management Rules page.

The latest seasonal allocations for July 2022 have been announced by the Storage Manager. This is the first allocation announcement of the 2022-23 year.

Sufficient water is held in storage to secure all headworks system operating water requirements for the 2022-23 season. However, further inflow is required before any allocation can be made to entitlements. Operating water represents the volume which is projected to be lost through the normal operation of  the headworks system. Evaporation from reservoirs represents the majority of system operating water requirements.

While no allocation has been possible to any entitlement at the time of the July 2022 water resource assessment, bulk entitlement holders collectively have access to approximately 109,000 megalitres of unused water allocation carried forward from 2021-22 year.

The Storage Manager has conducted an assessment of the risk of spill for the system headworks, as per the methodology defined in the Storage Management Rules. The results of this assessment have enabled the Storage Manager to declare a low risk of spill for the 2022-23 water year as of 1 July 2022.

The latest seasonal allocations for June 2022 have been announced by the Storage Manager. This is the final allocation announcement for the 2021/22 season.

The month of May saw below average rainfall recorded at all reservoirs. A further small improvement in the volume available for allocation resulted from lower than forecast evaporation from reservoirs, combined with a very small volume of inflow.  

This resource improvement has enabled allocations to Wimmera-Mallee Pipeline Product entitlements to increase from 59% to 63%. Glenelg River Compensation Flow entitlement allocation increased from 3% to 7%. Recreation entitlement increased from 1% to 5% allocation, and Wetlands entitlement increased from 1% to have a 6% allocation. No allocation has been possible to Commonwealth Environmental Water Holder entitlements this season. The volume allocated to the System Reserve remains at 15,000 megalitres.