Weekly Water Report Archives
4 June 2010
OVERALL
STORAGE
LEVEL
32.7%
WEEKLY
STORAGE
CHANGE
0.0%
SAME TIME
LAST
YEAR
26.2%
AVERAGE
DAILY
CONSUMPTION
133 L
AVERAGE
CATCHMENT
RAINFALL
30.7mm
Downpour over Thomson steadies storages
A large storm over the Thomson catchment helped hold storages at 32.7% during the week.
As a consequence the Thomson reservoir received the lion’s share of water added to storages.
While most of the catchments had little rainfall, the 61mm that fell over Thomson, lifted the weekly average to 30.7mm.
This was 50% above the long-term average for the period of 20.5mm.
As a result of the good falls, streamflow entering the reservoirs was close to the average for the period.
The 5.5 billion litres of runoff that flowed into the major reservoirs was only 3.4% below the norm of 5.7 billion litres.
Storages are now 32.7% (592.2 billion litres) full, compared with 26.2% (463.6 billion litres) at the same time last year – a difference of 128.6 billion litres.
For the 13th week in a row Melbourne households kept residential water use under the target of 155 litres per person a day.
Melburnians used a daily average of 133 litres each – 22 litres below the target.
More information on restrictions and tips on how to reach the target are available from Target 155 or by contacting the government water retailers.
Stage 3 restrictions and Target 155 are currently in place.
Daily residential water use for Melbourne
PREVIOUS WEEKS
CURRENT WEEK
TARGET 155
All figures include non-metropolitan supply for Western Water (supplied since March 2000), which are not included in annual Melbourne metropolitan consumption figures.
Melbourne's water storages
View interactive storage graph for 1997-2010 (opens in a new window)
2007-08 2008-09 2009-10
100% capacity = 1810.5 GL
NB: Prior to 26 June 2009, 100% capacity = 1773 GL
Total system storage (as of 3 June 2010)
| Reservoir | Capacity at full supply (ML) | Current Volume (ML) | % Full |
|---|---|---|---|
| Thomson | 1,068,000 | 226,540 | 21.2% |
| Cardinia | 287,000 | 96,624 | 33.7% |
| Upper Yarra | 200,000 | 113,971 | 57.0% |
| Sugarloaf | 96,000 | 55,790 | 58.1% |
| Silvan | 40,000 | 34,724 | 86.8% |
| Tarago | 37,500 | 21,606 | 57.6% |
| Yan Yean | 30,000 | 9,895 | 33.0% |
| Greenvale | 27,000 | 17,119 | 63.4% |
| Maroondah | 22,000 | 13,034 | 59.2% |
| O'Shannassy | 3,000 | 2,874 | 95.8% |
| Total | 1,810,500 | 592,177 | 32.7% |
Rainfall recorded at the reservoirs
| Catchment | 28 May - 3 Jun 2010 |
Average for the period* |
Variation | 28 May - 3 Jun 2009 |
|---|---|---|---|---|
| Thomson | 61 mm | 17.5 mm | 248.6% above | 16.4 mm |
| Upper Yarra | 4.6 mm | 21.9 mm | 79.0% below | 4.6 mm |
| O'Shannassy | 3.6 mm | 28.1 mm | 87.2% below | 6.2 mm |
| Maroondah | 6 mm | 20.9 mm | 71.3% below | 7 mm |
* Average (30 year mean 1980-2009)
Stream flow for the major catchments
| Catchment | 28 May - 3 Jun 2010 |
Average for the period* |
Variation | 28 May - 3 Jun 2009 |
|---|---|---|---|---|
| Thomson | 3084 ML | 2270 ML | 35.9% above | 1034 ML |
| Upper Yarra | 493 ML | 1160 ML | 57.5% below | 1109 ML |
| O'Shannassy | 1264 ML | 1130 ML | 11.9% above | 1167 ML |
| Maroondah | 638 ML | 1110 ML | 42.5% below | 442 ML |
| Total | 5479 ML | 5670 ML | 3.4% below | 3752 ML |
* Average (30 year mean 1980-2009)
Note: These results are preliminary and are validated at the end of the month.
Yarra Catchment
Report for period 27 May - 2 June 2010 (inclusive):
- Current seven day rolling average flows for Yarra River @ Yarra Glen = 768 ML/day (up 139.7 ML/day from the previous week)
- Current seven day rolling average flows for Yarra River @ Warrandyte = 209.5 ML/day (down 5.1 ML/day from the previous week)
- Current seven day rolling average flows for Little Yarra River @ Yarra Junction = 41.1 ML/day (down 68,486.2 ML/day from the previous week)
- Current seven day rolling average flows for Woori Yallock Creek @ Yellingbo = 50 ML/day (up 8.1 ML/day from the previous week)
- Total rainfall at Upper Yarra Reservoir for June is 0.2 mm (long-term monthly average for June is 101.6 mm)
- Total rainfall at Upper Yarra Reservoir for May is 53.4 mm (long-term monthly average for May is 82.0 mm)
- Total rainfall at Silvan Reservoir for June is 0.2 mm (long-term monthly average for June is 114.6 mm)
- Total rainfall at Silvan Reservoir for May is 60.8 mm (long-term monthly average for May is 94.7 mm)
Maribyrnong Catchment
Report for period 27 May - 2 June 2010 (inclusive):
Rosslyne Reservoir
Melbourne Water's Capacity Share of the storage as at 31 May 2010 was 34 Megalitres (ML)
- Current release from Rosslyne (as at 31 May 2010) to meet bulk entitlement demands = 0 ML/day
- Current seven day rolling average flows for Jacksons Creek @ Sunbury = 1.8 ML/day (down 2.7 ML/day from the previous week)
- Current seven day rolling average flows for Deep Creek @ Bulla = 2.4 ML/day (up 1.5 ML/day from the previous week)
- Current seven day rolling average flows for Maribyrnong River @ Keilor (Brimbank Park) = 7.1 ML/day (up 3.7 ML/day from the previous week)
- Total rainfall at Rosslyne Reservoir for June is 0.6 mm (long-term monthly average for June is 59.0 mm)
- Total rainfall at Rosslyne Reservoir for May is 26.8 mm (long-term monthly average for May is 51.4 mm)
Note: Passing flows at Keilor, as per the bulk entitlement agreement, require 5.0 ML/day or natural, whichever is the lesser, to be passed at Keilor. Natural flows are based on flows at Deep Ck @ Bulla gauging station.
View our archived weekly water updates.
Downloads
- Weekly Water Updates 1998 (PDF, 109kb)
- Weekly Water Updates 1999 (PDF, 445kb)
- Weekly Water Updates 2000 (PDF, 717kb)
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