Water storage and supply report - 25 September 2008

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

Warragamba

Less than 5 mm

Upper Nepean

Less than 5 mm

Woronora

5 mm

Shoalhaven

6 mm

Blue Mountains

Less than 5 mm

As at 3 pm Thursday, 25 September 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 970 megalitres per day and to Tallowa Dam was 360 megalitres per day.

The available storage as at 3 p.m. Thursday, 18 September 2008 was 66.5%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri.

19.9.08

19 °C

Nil

1 243 ML

1 734 000 ML

66.5 %

Sat.

20.9.08

26 °C

Nil

1 401 ML

1 734 000 ML

66.5 %

Sun.

21.9.08

33 °C

Nil

1 428 ML

1 733 500 ML

66.4 %

Mon.

22.9.08

22 °C

Nil

1 564 ML

1 733 000 ML

66.4 %

Tue.

23.9.08

30 °C

3.0 mm

1 384 ML

1 731 500 ML

66.4 %

Wed.

24.9.08

17 °C

2.0 mm

1 222 ML

1 729 500 ML

66.3 %

Thu.

25.9.08

19 °C

Nil

1 339 ML

1 728 500 ML

66.3 %

 

Total supply for the week

9 582 ML

Average daily supply during week

1 369  ML

Volume pumped from Shoalhaven for the week

1 518 ML

Net weekly storage change (megalitres)

-5 440 ML

Net weekly storage change (percentage)

 - 0.2  %

 

Available Water Storage as at 25 September 2008

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94 300

- 1.50

82 080

87.0

-860

Cordeaux

93 640

- 0.96

86 350

92.2

-430

Avon

146 700

- 2.37

122 600

83.6

-890

Nepean

69 810

- 5.34

53 940

77.3

-300

Woronora

71 790

- 9.24

43 120

60.1

-460

Warragamba

2 027 000

- 11.65

1 251 250

61.7

570

Prospect

33 300

- 0.55

30 460

91.5

-50

Wingecarribee

24 100

- 1.98

15 840

65.7

-140

Fitzroy Falls

10 000

- 0.91

5 470

54.7

-2 730

Tallowa*

35 300*

- 0.02

35 160*

99.6*

-140

Blue Mountains

2 790

 

2 320

83.2

-10

Total 

2 608 730 

 

1 728 590

66.3

-5 440


*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.


 

 

Graph of available storage at 25 September 2008