Bulk water storage and supply report - 18 October 2007

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

Warragamba –

Less than 5 mm

Upper Nepean –

5 mm

Woronora –

Less than 5 mm

Shoalhaven –

5 mm

Blue Mountains –

Less than 5 mm.

As at 3 p.m. Thursday, 18 October 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 450 megalitres per day and to Tallowa Dam was 140 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.

12.10.07

25°C

9.0 mm

1 390 ML

1 501 500 ML

58.1%

Sat.

13.10.07

21°C

2.0 mm

1 339 ML

1 500 500 ML

58.1%

Sun.

14.10.07

19°C

Nil

1 461 ML

1 499 000 ML

58.0%

Mon.

15.10.07

23°C

Nil

1 613 ML

1 497 500 ML

57.9%

Tue.

16.10.07

28°C

Nil

1 559 ML

1 496 000 ML

57.9%

Wed.

17.10.07

33°C

Nil

1 340 ML

1 494 500 ML

57.8%

Thu.

18.10.07

18°C

Nil

1 287 ML

1 493 000 ML

57.8%

 

Total supply for the week

      9 988 ML

Average daily supply during week

      1 427 ML

Volume pumped from Shoalhaven for the week

      4 322 ML

Net weekly storage change (megalitres)

   - 9 960 ML

Net weekly storage change (percentage)

- 0.3 %

 

Available Water Storage as at 18 October 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.72

80,380

85.2

-930

Cordeaux

93,640

- 3.70

67,910

72.5

-60

Avon

146,700

- 4.00

107,140

73.0

-740

Nepean

69,810

- 4.35

56,690

81.2

-990

Woronora

71,790

- 10.65

39,660

55.2

-210

Warragamba

2,027,000

- 14.79

1,082,310

53.4

-4,060

Prospect

8,870

- 0.34

7,140

80.5

-50

Wingecarribee

24,100

- 1.40

18,140

75.3

270

Fitzroy Falls

10,000

- 0.29

8,540

85.4

550

Tallowa*

35,300*

- 1.74

22,420*

63.5*

-3,670

Blue Mountains

2,790

 

2,190

78.5

-70

Total

2,584,300

 

1,492,520

57.8

-9,960


*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.