Bulk water storage and supply report - 25 October 2007

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

Warragamba –

Less than 5 mm 

Upper Nepean –

5 mm 

Woronora -

5 mm 

Shoalhaven –

Less than 5 mm 

Blue Mountains –

7 mm.

As at 3 p.m. Thursday, 25 October 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 400 megalitres per day and to Tallowa Dam was 100 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.

19.10.07

22°C

Nil

1 455 ML

1 491 000 ML

57.7%

Sat.

20.10.07

27°C

Nil

1 434 ML

1 489 500 ML

57.6%

Sun.

21.10.07

24°C

Nil

1 517 ML

1 488 000 ML

57.6%

Mon.

22.10.07

25°C

Nil

1 772 ML

1 486 500 ML

57.5%

Tue.

23.10.07

28°C

Nil

1 468 ML

1 485 000 ML

57.5%

Wed.

24.10.07

23°C

Nil

1 396 ML

1 483 500 ML

57.4%

Thu.

25.10.07

21°C

10.0 mm

1 405 ML

1 482 000 ML

57.3%

 

Total supply for the week

       10 446 ML

Average daily supply during week

       1 492 ML

Volume pumped from Shoalhaven for the week

       3 045 ML

Net weekly storage change (megalitres)

  - 10 650 ML

Net weekly storage change (percentage)

       - 0.5 %

 

Available Water Storage as at 25 October 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.84

79,460

84.3

-920

Cordeaux

93,640

- 3.73

67,730

72.3

-180

Avon

146,700

- 4.08

106,400

72.5

-740

Nepean

69,810

- 4.18

57,170

81.9

480

Woronora

71,790

- 10.72

39,490

55.0

-170

Warragamba

2,027,000

- 14.91

1,076,260

53.1

-6,050

Prospect

8,870

- 0.38

6,940

78.2

-200

Wingecarribee

24,100

- 1.43

18,020

74.8

-120

Fitzroy Falls

10,000

- 0.48

7,580

75.8

-960

Tallowa*

35,300*

- 1.98

20,640*

58.5*

-1,780

Blue Mountains

2,790

 

2,180

78.1

-10

Total

2,584,300

 

1,481,870

57.3

-10,650


*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.