Bulk water storage and supply report - 9 August 2007

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

·                     Warragamba –

Negligible

·                     Upper Nepean –

Negligible

·                     Woronora -

Negligible

·                     Shoalhaven –

Negligible

·                     Blue Mountains –

Negligible

As at 3 p.m. Thursday, 9 August 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,010 megalitres per day and to Tallowa Dam was 570 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.

3.8.07

22°C

1.0 mm

1 245 ML

1 487 500 ML

57.6%

Sat.

4.8.07

13°C

3.0 mm

1 198 ML

1 487 500 ML

57.6%

Sun.

5.8.07

16°C

Nil

1 271 ML

1 487 000 ML

57.5%

Mon.

6.8.07

19°C

Nil

1 391 ML

1 487 000 ML

57.5%

Tue.

7.8.07

19°C

Nil

1 308 ML

1 487 000 ML

57.5%

Wed.

8.8.07

20°C

Nil

1 374 ML

1 486 500 ML

57.5%

Thu.

9.8.07

23°C

Nil

1 210 ML

1 486 000 ML

57.5%

 

Total supply for the week

      8 998 ML

Average daily supply during week

      1 285 ML

Volume pumped from Shoalhaven for the week

      3 045 ML

Net weekly storage change (megalitres)

  - 1 370 ML

Net weekly storage change (percentage)

- 0.1 %

 

Available Water Storage as at 9 August 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.62

81,150

86.1

230

Cordeaux

93,640

- 4.34

64,060

68.4

170

Avon

146,700

- 4.16

105,650

72.0

640

Nepean

69,810

- 3.03

60,480

86.6

-3,410

Woronora

71,790

- 11.20

38,370

53.4

-190

Warragamba

2,027,000

- 15.14

1,064,660

52.5

1,510

Prospect

8,870

- 0.46

6,570

74.1

-90

Wingecarribee

24,100

- 1.27

18,680

77.5

-270

Fitzroy Falls

10,000

- 0.21

8,980

89.8

230

Tallowa*

35,300*

- 0.02

35,150*

99.6*

-150

Blue Mountains

2,790

 

2,350

84.2

-40

Total

2,584,300

 

1,486,100

57.5

-1,370


*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 9 August 2007