Water storage and supply report - 27 December 2007

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

Warragamba

20 mm  

Upper Nepean

10 mm 

Woronora

10 mm  

Shoalhaven

20 mm  

Blue Mountains

35 mm.

As at 3 p.m. Thursday, 27 December 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,000 megalitres per day and to Tallowa Dam was 1,100 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.

21.12.07

25°C

0.4 mm

1 252 ML

1 566 500 ML

60.6%

Sat.

22.12.07

28°C

3.0 mm

1 313 ML

1 568 000 ML

60.7%

Sun.

23.12.07

28°C

4.0 mm

1 321 ML

1 570 000 ML

60.8%

Mon.

24.12.07

23°C

Nil

1 414 ML

1 570 500 ML

60.8%

Tue.

25.12.07

22°C

17.0 mm

1 325 ML

1 571 500 ML

60.8%

Wed.

26.12.07

20°C

Nil

1 095 ML

1 572 500 ML

60.8%

Thu.

27.12.07

23°C

Nil

1 120 ML

1 573 500 ML

60.9%

 

Total supply for the week

8 840 ML

Average daily supply during week

1 263 ML

Volume pumped from Shoalhaven for the week

5 818 ML

Net weekly storage change (megalitres)

8 470 ML

Net weekly storage change (percentage)

+ 0.3 %

 

Available Water Storage as at 27 December 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.52

81,930

86.9

-310

Cordeaux

93,640

- 2.52

75,440

80.6

390

Avon

146,700

- 3.87

108,350

73.9

560

Nepean

69,810

- 3.10

60,280

86.3

530

Woronora

71,790

- 11.16

38,460

53.6

-370

Warragamba

2,027,000

- 13.74

1,136,920

56.1

5,750

Prospect

8,870

- 0.79

4,920

55.5

-90

Wingecarribee

24,100

- 0.96

19,980

82.9

1,260

Fitzroy Falls

10,000

- 0.16

9,220

92.2

780

Tallowa*

35,300*

+ 0.01

35,300*

100.0*

0

Blue Mountains

2,790

 

2,480

88.9

-30

Total

2,584,300

 

1,573,280

60.9

8,470


*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 27 December 2007