Bulk water storage and supply report - 21 February 2008

During the week the following rainfall (approximately) was recorded in the catchments:

Warragamba

Less than 5 mm  

Upper Nepean

5 mm

Woronora

5 mm

Shoalhaven

Less than 5 mm

Blue Mountains

5 mm

As at 3 p.m. Thursday, 21 February 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,050 megalitres per day and to Tallowa Dam was 900 megalitres per day.

 

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri.

15.2.08

24°C

Nil

1 239 ML

1 732 500 ML

66.4 %

Sat.

16.2.08

24°C

Nil

1 239 ML

1 733 500 ML

66.4 %

Sun.

17.2.08

24°C

Nil

1 297 ML

1 733 500 ML

66.4 %

Mon.

18.2.08

25°C

Nil

1 290 ML

1 734 000 ML

66.5 %

Tue.

19.2.08

25°C

Nil

1 315 ML

1 735 000 ML

66.5 %

Wed.

20.2.08

25°C

Nil

1 319 ML

1 735 000 ML

66.5 %

Thu.

21.2.08

26°C

Nil

1 382 ML

1 734 500 ML

66.5 %

 

Total supply for the week

 9 081 ML

Average daily supply during week

 1 297 ML

Volume pumped from Shoalhaven for the week

 3 045 ML

Net weekly storage change (megalitres)

 3 160 ML

Net weekly storage change (percentage)

+ 0.1 %

 

Available Water Storage as at 21 February 2008

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 0.09 

93,540 

99.2 

-760 

Cordeaux

93,640

- 0.20 

92,090 

98.3 

770 

Avon

146,700

- 1.56 

130,630 

89.0 

990 

Nepean

69,810

- 0.58 

67,960 

97.3 

130 

Woronora

71,790

- 8.47 

45,090 

62.8 

-210 

Warragamba

2,027,000

- 12.42 

1,208,430 

59.6 

3,880 

Prospect#

33,300

- 0.61 

30,180 

90.6 

-1,100 

Wingecarribee

24,100

- 1.06 

19,570 

81.2 

-10 

Fitzroy Falls

10,000

- 0.20 

9,000 

90.0 

-460 

Tallowa*

35,300*

+ 0.04 

35,300* 

100* 

0 

Blue Mountains

2,790

 

2,600 

93.2 

-70 

Total

 

2,608,730

 

 

1,734,390 

 

66.5 

 

3,160 

 


*NOTE: The "full operating storage" for Tallowa Dam refers only to the amount of water in the dam that is available to be transferred to Sydney and the Illawarra.  When full, the dam can hold 90,000 ML but only 35,300 ML is available to be transferred.

Other water from Tallowa Dam is provided to Shoalhaven City Council for supply to local communities.  Water is also released from the dam as environmental flows for the Shoalhaven River.

#NOTE: With the completion and commissioning of the new Prospect Raw Water Pumping Station, an additional 24,400 megalitres of water can now be accessed from Prospect Reservoir. This previously inaccessible water has now been added to the full operating storage for Prospect Reservoir.

 

Graph of available storage at 21 February 2008