Water storage and supply report - 20 November 2008


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

 

Warragamba

20 mm

Upper Nepean

30 mm

Woronora

25 mm

Shoalhaven

20 mm

Blue Mountains

30 mm

As at 3 pm Thursday, 20 November 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 300 megalitres per day and to Tallowa Dam was 115 megalitres per day.

The available storage as at 3 p.m. Thursday, 13 November 2008 was 64.8%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri

14.11.08

25°C

Nil

1 526 ML

1 689 000 ML

64.7%

Sat

15.11.08

27°C

7.0 mm

1 456 ML

1 687 500 ML

64.7%

Sun

16.11.08

23°C

1.0 mm

1 429 ML

1 686 500 ML

64.6%

Mon

17.11.08

22°C

Nil

1 402 ML

1 685 500 ML

64.6%

Tue

18.11.08

21°C

Nil

1 335 ML

1 684 500 ML

64.6%

Wed

19.11.08

23°C

6.0 mm

1 354 ML

1 683 000 ML

64.5%

Thu

20.11.08

22°C

29.0 mm

1 271 ML

1 683 500 ML

64.5%

 

Total supply for the week

9 772 ML

Average daily supply during week

1 396 ML

Volume pumped from Shoalhaven for the week

658 ML

Net weekly storage change (megalitres)

- 7 720 ML

Net weekly storage change (percentage)

- 0.3 %

 

Available water storage as at 20 November 2008

Storage

Full operating storage (ML)

Storage level (m)

Available storage (ML)

Available storage (%)

Net weekly change (ML)

Cataract

94 300

- 2.08

77 650

82.3

- 300

Cordeaux

93 640

- 1.10

85 330

91.1

- 730

Avon

146 700

- 2.98

116 700

79.6

- 480

Nepean

69 810

- 6.29

51 390

73.6

- 1 600

Woronora

71 790

- 10.50

40 010

55.7

- 460

Warragamba

2 027 000

- 12.18

1 221 740

60.3

- 3 880

Prospect

33 300

- 0.26

31 950

95.9

110

Wingecarribee

24 100

- 1.98

15 840

65.7

190

Fitzroy Falls

10 000

- 0.31

8 450

84.5

- 670

Tallowa*

35 300*

- 0.42

32 160*

91.1*

70

Blue Mountains

2 790

 

2 180

78.1

30

Total 

2 608 730 

 

1 683 400 

64.5

- 7 720

 

*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 water storage and supply as at 20 November 2008