Water storage and supply report - 18 September 2008

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

Warragamba

15 mm

Upper Nepean

14 mm

Woronora

13 mm

Shoalhaven

12 mm

Blue Mountains

20 mm

As at 3 pm Thursday, 18 September 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1 650 megalitres per day and to Tallowa Dam was 520 megalitres per day.

The available storage as at 3 p.m. Thursday, 11 September 2008 was 66.3%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri.

12.9.08

18 °C

Nil

1 230 ML

1 731 000 ML

66.4 %

Sat.

13.9.08

 24 °C

Nil

1 271 ML

1 731 500 ML

66.4 %

Sun.

14.9.08

 31 °C

4.0 mm

1 394 ML

1 732 000 ML

66.4 %

Mon.

15.9.08

23°C

4.0 mm

1 340 ML

1 732 500 ML

66.4 %

Tue.

16.9.08

28°C

Nil

1 258 ML

1 733 500 ML

66.4 %

Wed.

17.9.08

 20°C

Nil

1 339 ML

1 734 000 ML

66.5 %

Thu.

18.9.08

 16°C

Nil

1 330 ML

1 734 000 ML

66.5 %

 

Total supply for the week

9 162 ML

Average daily supply during week

1 309  ML

Volume pumped from Shoalhaven for the week

1 264 ML

Net weekly storage change (megalitres)

3 720 ML

Net weekly storage change (percentage)

 + 0.2  %

 

Available Water Storage as at 18 September 2008

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94 300

- 1.39

82 940

88.0

-550

Cordeaux

93 640

- 0.90

86 780

92.7

-160

Avon

146 700

- 2.28

123 490

84.2

-690

Nepean

69 810

- 5.23

54 240

77.7

-80

Woronora

71 790

- 9.06

43 580

60.7

-210

Warragamba

2 027 000

- 11.66

1 250 680

61.7

5 640

Prospect

33 300

- 0.54

30 510

91.6

-110

Wingecarribee

24 100

- 1.95

15 980

66.3

-330

Fitzroy Falls

10 000

- 0.36

8 200

82.0

200

Tallowa*

35 300*

+ 0.04

35 300*

100.0*

0

Blue Mountains

2 790

 

2 330

83.5

10

Total 

2 608 730 

 

1 734 030

66.5

3 720


*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 available water storage as at 18 September 2008