Bulk Water Storage & Supply Report - 20 December 2007

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

Warragamba –

25 mm  

Upper Nepean –

35 mm 

Woronora -

25 mm  

Shoalhaven –

35 mm  

Blue Mountains –

20 mm.

As at 3 p.m. Thursday, 20 December 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,900 megalitres per day and to Tallowa Dam was 1,300 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.

14.12.07

24°C

Nil

1 346 ML

1 555 000 ML

60.2%

Sat.

15.12.07

23°C

Nil

1 264 ML

1 556 500 ML

60.2%

Sun.

16.12.07

27°C

Nil

1 347 ML

1 558 000 ML

60.3%

Mon.

17.12.07

25°C

14.0 mm

1 361 ML

1 561 500 ML

60.4%

Tue.

18.12.07

24°C

0.6 mm

1 241 ML

1 563 000 ML

60.5%

Wed.

19.12.07

23°C

Nil

1 265 ML

1 564 500 ML

60.5%

Thu.

20.12.07

24°C

0.2mm

1 299 ML

1 565 000 ML

60.6%

 

Total supply for the week

       9 104 ML

Average daily supply during week

       1 301 ML

Volume pumped from Shoalhaven for the week

       5 616 ML

Net weekly storage change (megalitres)

  14 150ML

Net weekly storage change (percentage)

       + 0.6 %

 

Available Water Storage as at 20 December 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.48

82,240

87.2

620

Cordeaux

93,640

- 2.58

75,050

80.1

1,380

Avon

146,700

- 3.93

107,790

73.5

280

Nepean

69,810

- 3.28

59,750

85.6

1,610

Woronora

71,790

- 11.00

38,830

54.1

40

Warragamba

2,027,000

- 13.85

1,131,170

55.8

10,940

Prospect

8,870

- 0.77

5,010

56.5

0

Wingecarribee

24,100

- 1.26

18,720

77.7

-430

Fitzroy Falls

10,000

- 0.31

8,440

84.4

-250

Tallowa*

35,300*

+ 0.09

35,300*

100.0*

0

Blue Mountains

2,790

 

2,510

90.0

-40

Total

2,584,300

 

1,564,810

60.6

14,150


*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 showing available storage at 20 December 2007