Bulk water storage and supply report - 23 February 2006

During the week approximately 20 millimetres of rainfall was recorded on the Warragamba Catchment, 15 millimetres on the Shoalhaven Catchment, 10 millimetres on the Blue Mountains Catchment and less than 5 millimetres on the Upper Nepean Catchment.

As at 3 p.m. Thursday 23 February 2006, the inflow rates to Warragamba Dam including Shoalhaven transfers was 260 megalitres per day and to Tallowa Dam was 130 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.

17.2.06

29°C

8.0 mm

1 405 ML

1 042 000 ML

43.7%

Sat.

18.2.06

32°C

Nil

1 523 ML

1 041 500 ML

43.7%

Sun.

19.2.06

33°C

0.6 mm

1 675 ML

1 040 000 ML

43.6%

Mon.

20.2.06

30°C

0.2 mm

1 698 ML

1 038 500 ML

43.5%

Tue.

21.2.06

25°C

Nil

1 487 ML

1 037 500 ML

43.5%

Wed.

22.2.06

28°C

Nil

1 415 ML

1 036 000 ML

43.4%

Thu.

23.2.06

28°C

Nil

1 548 ML

1 034 500 ML

43.4%

 

Total supply for the week

10 751 ML

 

Average daily supply during week

  1 536 ML

 

Volume pumped from Shoalhaven for the week

      900 ML

 

Net weekly storage change

  -8 820 ML

-0.3%

 

Available Water Storage as at 23 February 2006

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 8.26

39,430

41.8

-240

Cordeaux

93,640

- 5.89

55,410

59.2

-50

Avon

146,700

- 8.90

65,290

44.5

-860

Nepean

40,810

- 10.60

11,700

28.7

-1,520

Woronora

71,790

- 17.68

25,330

35.3

-190

Warragamba

1,857,000

- 17.27

790,640

42.6

-4,730

Prospect

8,870

- 0.93

4,230

47.7

-50

Wingecarribee

24,100

- 1.59

17,370

72.1

-250

Fitzroy Falls

10,000

- 0.26

8,730

87.3

380

Tallowa*

35,300*

- 2.92

14,060*

39.8*

-1,260

Blue Mountains

2,790

 

2,460

88.2

-50

Total

2,385,300

 

1,034,650

43.4

-8,820


*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.