Water Resources

Coliban System (Southern) data is updated Monday to Friday, except on public holidays and when our office is closed over the Christmas period. The Lake Eppalock (Coliban Water share) data is updated on Tuesday.

Last updated: Tuesday, 23 October 2018

 

Summary

Below is a summary of rainfall, inflows and storage volumes for our Coliban System (Southern) three major catchment storage. Rainfall is recorded at Malmsbury Reservoir at 7.30am.

 

To Rainfall Inflow Volume
Day YTD* Day YTD*
millimetres millimetres megalitres megalitres megalitres % full
This morning 0.0 231.0 68 18,573 60,357 86.7%
Yesterday morning 0.0 231.0 72 18,490 60,424 86.8%
 
This time last year** -2% 235.0 -38% 25,623 68,703 98.7%
Last 20 year median** -18% 273.0 -20.5% 22,384 -13.8%

 

* Year To Date since 1 July 2018
**Percentages are current against same time last year / last 20 year median


Our storage volumes

Below is a summary of storage levels and rainfall for our three major catchment storages near Kyneton. These storages are required to supply the townships and areas of Castlemaine and Kyneton, and to supplement supply to Bendigo.

 

Storage Capacity at full supply Current volume Volume same time last year
megalitres
megalitres
% full
megalitres
% full
Upper Coliban 37,770 37,811 100.1% 37,651 99.7%
Lauriston 19,790 18,850 95.3% 19,530 98.7%
Malmsbury 12,034 3,696 30.7% 11,390 94.6%
TOTAL 69,594 60,357 86.7% 68,571 98.5%

 

Below is a summary of the storage level and rainfall for our share of Lake Eppalock. We have an 18% capacity share of total volume and inflows.

 

Storage Capacity at full supply Current volume Volume same time last year
megalitres
megalitres
% full
megalitres
% full
Lake Eppalock
- Coliban Share
54,837 48,254 88% 54,523 99.4%

 

 

Last 10 days - storage volume

Below is a 10 day summary of storage levels for our three major catchment storages near Kyneton. These storages are required to supply the townships and areas of Castlemaine and Kyneton, and to supplement supply to Bendigo.

 

Date Current volume Volume change
megalitres % full megalitres % full
Sunday, 14 October 2018 60,820 87.4% -88 -0.1%
Monday, 15 October 2018 60,773 87.3% -47 -0.1%
Tuesday, 16 October 2018 60,733 87.3% -40 -0.1%
Wednesday, 17 October 2018 60,760 87.3% 27 0%
Thursday, 18 October 2018 60,689 87.2% -71 -0.1%
Friday, 19 October 2018 60,642 87.1% -47 -0.1%
Saturday, 20 October 2018 60,588 87.1% -54 -0.1%
Sunday, 21 October 2018 60,478 86.9% -110 -0.2%
Monday, 22 October 2018 60,424 86.8% -54 -0.1%
Tuesday, 23 October 2018 60,357 86.7% -67 -0.1%
10 day total -551 -0.8%

 

 

Last 10 days - rainfall and inflows

Below is a 10 day summary of rainfall and inflows for our three major catchment storages near Kyneton.

 

Date Malmsbury
rainfall
(mm)
Inflow from water balance calculation
Inflow Year to date Inflow *
megalitres megalitres
Sunday, 14 October 2018 0.0 41 17,814
Monday, 15 October 2018 0.0 49 17,883
Tuesday, 16 October 2018 3.0 60 17,986
Wednesday, 17 October 2018 9.0 110 18,143
Thursday, 18 October 2018 5.0 106 18,200
Friday, 19 October 2018 0.0 96 18,275
Saturday, 20 October 2018 3.0 76 18,370
Sunday, 21 October 2018 6.0 68 18,403
Monday, 22 October 2018 0.0 72 18,490
Tuesday, 23 October 2018 0.0 68 18,573
10 Day Total 26.0 744

* Since 1 July 2018

 

Last 10 days - Lauriston and Malmsbury releases (Coliban Main Channel and Coliban River)

Below is a 10 day summary of discharges from Lauriston Reservoir and Malmsbury Reservoir to the Coliban River and Coliban Main Channel. Discharges from Lauriston Reservoir flow downstream and are recaptured in Malmsbury Reservoir. Coliban River discharges may be passing flows as required under our Bulk Entitlement, Environmental Reserve Discharges (as directed by the North Central Catchment Management Authority) or reservoir spills. Coliban Main Channel discharges are to supply Castlemaine, Coliban Rural System (Southern) and supplement supply to Coliban System Northern (Bendigo).

 

Date Lauriston Reservoir Malmsbury Reservoir
Main Channel
Coliban River*
Total**
(ML/day) (ML/day)
(ML/day)
(ML/day)
Sunday, 14 October 2018 18 58 4 62
Monday, 15 October 2018 15 74 4 78
Tuesday, 16 October 2018 19 99 4 103
Wednesday, 17 October 2018 19 112 4 117
Thursday, 18 October 2018 102 112 4 116
Friday, 19 October 2018 139 112 4 116
Saturday, 20 October 2018 138 112 4 116
Sunday, 21 October 2018 136 112 4 116
Monday, 22 October 2018 135 112 5 117
Tuesday, 23 October 2018 135 112 5 118
10 day total 858 1,017 42 1,059
Year to date 2,934 2,925 464 3,389

 

* Includes spills, environmental releases, passing flows and other operationally required discharges.

** Total Malmsbury Reservoir release only (Main Channel and Coliban River)

 

> Catchment storages and holding basin information from the Bureau of Meteorology website


The Bureau of Meteorology (BOM) website has archive volume information on some of our storages and holding basins dating back to 2011. The information is updated every Friday. Click on the links below to visit the BOM website.

Barkers Creek
Lauriston

Malmsbury
McCay
Sandhurst
Spring Gully
Upper Coliban

If you have any suggestions or requests regarding this page we'd love to hear them.
Please email communications@coliban.com.au

 

 

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