Weekly water update

Archived Report

Data for week ending 16 January 2014

Dam storage levels

79.7%

1444.8 billion litres this week

-0.6%

Less than week ending 09 January 2014

Avg. catchment rainfall

0.7 mm

This week

-3.4mm

Less than week ending 09 January 2014

Flow into dams

3,150 ML

This week

-1157ML

Less than week ending 09 January 2014

Water use

255 L

Daily avg. per person this week

104L

More than week ending 09 January 2014

Extreme heat takes toll on storages

Melbourne’s water storages fell by 0.6% of capacity in a week of extreme heat and minimal rainfall.

The weekly result, which represents a net decrease of 10.7 billion litres, came as the major catchments had virtually no rain. The four major catchments received between 0 and 1.6 mm of rain, with the average being 0.7 mm. 
 
The amount of water flowing from the catchments into reservoirs (streamflow) was similarly well below par. The 3.2 billion litres of streamflow was 37.3% below the 30-year average (5 billion litres).
 
Water storages are 79.7% full (1,444.8 billion litres), up from 79.5% the same time last year – a difference of 5 billion litres.
 
As expected in such high temperatures, water use spiked as Melburnians kept cool and hydrated. Melbourne households used an average of 255 litres of water per person per day – 104 litres per person more than the previous week.

Information on water use rules and tips on how to save water are available from water.vic.gov.au or by contacting the government water retailers. Permanent water use rules are currently in place.

Dam storage levels

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79.7% full at 16 January 2014

1,444,799 ML
Reservoir Total capacity (ML) Current volume (ML) % Full Rainfall recorded (mm)
Thomson 1,068,000 881,075
-5,147 since last week
82.5% 1.6 (verified)
View hourly unverified
Cardinia 286,911 177,302
-3,264 since last week
61.8% N/A
View hourly unverified
Upper Yarra 200,579 152,906
+646 since last week
76.2% 0 (verified)
View hourly unverified
Sugarloaf 96,253 92,496
-1,831 since last week
96.1% N/A
View hourly unverified
Silvan 40,445 35,374
0 since last week
87.5% N/A
View hourly unverified
Tarago 37,580 35,260
0 since last week
93.8% N/A
View hourly unverified
Yan Yean 30,266 27,594
-78 since last week
91.2% N/A
View hourly unverified
Greenvale 26,839 18,405
-840 since last week
68.6% N/A
View hourly unverified
Maroondah 22,179 21,939
+81 since last week
98.9% 0 (verified)
View hourly unverified
O'Shannassy 3,123 2,448
-311 since last week
78.4% 0 (verified)
View hourly unverified
Total 1,812,175 1,444,799
-10,744 since last week
79.7% N/A

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Dam storage levels includes all of Melbourne's water storage areas that receive water from catchments and the desalination plant.

Storages

Total storage levels of Melbourne's reservoirs over the years. Data is updated at the end of each month. View our interactive storage graph, displaying data from 1940 - present.

Rainfall at dams

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Catchment This week (mm) This week's long term average (ML) based on mean from previous 30 years Variation
(to the average)
Same time last year
Thomson 1.6 11.0 -84.8% 0.8mm
Upper Yarra 0.0 12.0 -100.0% 0.6mm
O'Shannassy 0.0 12.0 -100.0% 0.2mm
Maroondah 0.0 9.0 -100.0% 0.0mm

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Rainfall data is a weighted average catchment figure that is validated and provided for four major catchments only.

Flow into dams

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Catchment This week (ML) This week's long term average (ML) based on mean from previous 30 years Variation
(to the average)
Same time last year (ML)
Thomson 980 1,740 -43.7% 906
Upper Yarra 503 1,120 -55.1% 93
O'Shannassy 895 1,150 -22.2% 783
Maroondah 772 1,010 -23.6% 604
Total 3,150 5,020 37.3% 2,386

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Flow into dams is a total of water flowing from our four major catchments into reservoirs.

Water use for Melbourne

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Daily water use This week's daily average (L) Last week's daily average (L)
Per Person Water Use 255 151

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Water use shows Melbourne's total usage each day and includes Western Water. The total amount used by all Melbournians -both business and households.

All figures include non-metropolitan supply for Western Water (supplied since March 2000), which are not included in annual Melbourne metropolitan consumption figures.

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