Water Resources

Coliban System (Southern) and Lake Eppalock (Coliban Water share) tables are updated Monday to Friday; catchment storages and holding basins table updated every Tuesday.

Last updated: Thursday, 19 September 2019

 

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.

 

To Rainfall Inflow Volume
Day YTD* Day YTD*
millimetres millimetres megalitres megalitres megalitres % full
This morning 0.0 162.0 82 22,423 66,096 95%
Yesterday morning 0.0 162.0 85 22,290 65,989 94.8%
 
This time last year** -16% 187.0 26.7% 16,438 60,400 86.8%
Long term average** -20% 194.0 27.7% 16,218 8.6%

 

* Year To Date since 1 July 2019
**Percentages are current against same time last year / long-term average


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% 37,811 100.1%
Lauriston 19,790 19,340 97.7% 19,010 96.1%
Malmsbury 12,034 8,945 74.3% 3,579 29.7%
TOTAL 69,594 66,096 95% 60,400 86.8%

 

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 36,830 67.2% 48,815 89%

 

 

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
Tuesday, 10 September 2019 65,306 93.8% 141 0.2%
Wednesday, 11 September 2019 65,445 94% 140 0.2%
Thursday, 12 September 2019 65,526 94.2% 81 0.1%
Friday, 13 September 2019 65,608 94.3% 82 0.1%
Saturday, 14 September 2019 65,713 94.4% 105 0.2%
Sunday, 15 September 2019 65,796 94.5% 83 0.1%
Monday, 16 September 2019 65,920 94.7% 124 0.2%
Tuesday, 17 September 2019 65,985 94.8% 64 0.1%
Wednesday, 18 September 2019 65,989 94.8% 4 0%
Thursday, 19 September 2019 66,096 95% 107 0.2%
10 day total 931 1.3%

 

 

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
Tuesday, 10 September 2019 0.0 228 21,438
Wednesday, 11 September 2019 0.0 237 21,594
Thursday, 12 September 2019 0.0 141 21,699
Friday, 13 September 2019 0.0 122 21,805
Saturday, 14 September 2019 0.0 112 21,931
Sunday, 15 September 2019 2.0 112 22,034
Monday, 16 September 2019 3.0 124 22,177
Tuesday, 17 September 2019 0.0 110 22,261
Wednesday, 18 September 2019 0.0 85 22,290
Thursday, 19 September 2019 0.0 82 22,423
10 Day Total 6.0 1353

* Since 1 July 2019

 

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)
Tuesday, 10 September 2019 11 5 5
Wednesday, 11 September 2019 23 5 5
Thursday, 12 September 2019 85 4 4
Friday, 13 September 2019 130 4 4
Saturday, 14 September 2019 95 4 4
Sunday, 15 September 2019 69 5 5
Monday, 16 September 2019 88 4 4
Tuesday, 17 September 2019 88 4 4
Wednesday, 18 September 2019 90 4 4
Thursday, 19 September 2019 89 4 4
10 day total 767 45 45
Year to date 4,644 373 373

 

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

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