Bulk water storage and supply report - 6 September 2007

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

Warragamba –

Less than 5 mm

Upper Nepean –

12 mm

Woronora –

9 mm

Shoalhaven –

7 mm

Blue Mountains –

10 mm.

As at 3 p.m. Thursday, 6 September 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 790 megalitres per day and to Tallowa Dam was 525 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.

31.8.07

21°C

Nil

1 251 ML

1 520 000 ML

58.8%

Sat.

1.9.07

26°C

Nil

1 308 ML

1 520 000 ML

58.8%

Sun.

2.9.07

18°C

Nil

1 325 ML

1 520 000 ML

58.8%

Mon.

3.9.07

21°C

Nil

1 387 ML

1 520 500 ML

58.8%

Tue.

4.9.07

21°C

Nil

1 322 ML

1 520 500 ML

58.8%

Wed.

5.9.07

17°C

6.0 mm

1 179 ML

1 521 000 ML

58.9%

Thu.

6.9.07

18°C

2.0 mm

1 221 ML

1 521 000 ML

58.9%

 

Total supply for the week

      8 993 ML

Average daily supply during week

      1 285 ML

Volume pumped from Shoalhaven for the week

      3 808 ML

Net weekly storage change (megalitres)

   + 1 340 ML

Net weekly storage change (percentage)

+  0.1 %

 

Available Water Storage as at 6 September 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 0.80

87,470

92.8

-690

Cordeaux

93,640

- 3.83

67,120

71.7

370

Avon

146,700

- 3.76

109,380

74.6

380

Nepean

69,810

- 4.96

54,990

78.8

390

Woronora

71,790

- 10.47

40,090

55.8

-70

Warragamba

2,027,000

- 14.65

1,089,480

53.7

1,560

Prospect

8,870

- 0.30

7,360

83.0

30

Wingecarribee

24,100

- 1.17

19,090

79.2

90

Fitzroy Falls

10,000

- 0.35

8,240

82.4

-880

Tallowa*

35,300*

- 0.01

35,270*

99.9*

140

Blue Mountains

2,790

 

2,540

91.0

20

Total

2,584,300

 

1,521,030

58.9

1,340


*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.