Perth metro weekly water update – 17 April 2020

17/04/2020

 

 

Target

Actual

April water use to date

14 billion litres

16 billion litres

Dam storage levels

N/A

42 per cent

Weekly streamflow into dams

N/A

44 billion litres

April rainfall to date

37.2 mm

(April average rainfall 1994-2017)

1.6 mm

Note: 1 billion litres = approx. 400 Olympic swimming pools. Please note the figures in this table are rounded (except for rainfall) to the nearest whole number.

 

 

 

 

 

 

 

 

 

 

Water use

 

Average water use over the past week was 922 million litres per day, which was above the forecast of 834 million litres.

 

Daily water use for the last five days

Date

Actual water use (million litres)

Forecast (million litres)

17/04/2020

900

822

16/04/2020

892

822

15/04/2020

881

822

14/04/2020

893

822

13/04/2020

880

849

Note: water use is calculated up to 8am each day for the previous 24 hour period

 

Since 1 July 2019, we have used 246.3 billion litres of water – which is 6.1 billion litres over the forecast for this period.

 

Dam level (total for 15 dams)

The dam storage levels have dropped slightly this week and are sitting at a combined 42.4 per cent* of full capacity.

 

*Please note some dams are filled from different sources - dam levels include the transfer of groundwater and desalinated seawater from treatment plants as well as streamflow (that comes from rainfall).  As we use many different sources of water, dams are no longer an accurate indicator of the health of Perth's overall water supply situation.

 

Streamflow (total for 15 dams)

 

From 1 May 2019 the dams have received 44.1 billion litres of streamflow.  The post-1975 average for the May to April period (called the streamflow year) is 183.9 billion litres.

 

Sprinkler roster compliance

 

The two-day a week sprinkler roster now applies. Since 1 January 2020, we have taken a total of 2148 actions (warnings + fines) compared with 3158 actions for the same period in 2019.

 

Annual rainfall

 

Perth has received 70.40 mm of rainfall since 1 January 2020. The average (1994-2017) rainfall for the April period is 87.9 mm.

 

General water news

 

A friendly reminder that picnic and recreational areas at Water Corporation managed dams across Western Australia are closed in line with advice to cease non-essential travel.

 

This includes the below Perth metropolitan dams:

  • Mundaring Weir

  • Victoria Dam

  • Canning Dam

  • Churchman Brook Dam

  • Wungong Dam

  • Serpentine Pipehead Dam

  • Serpentine Main Dam

  • North Dandalup Dam

  • South Dandalup Dam

     

Thank you for your co-operation.


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Contact: Media Team

Phone: (08) 9420 2555