Bulk water storage and supply report - 20 September 2007

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

 

Warragamba –

Less than 5mm

Upper Nepean –

Less than 5mm

Woronora –

Negligible

Shoalhaven –

Less than 5mm

Blue Mountains –

Negligible.

As at 3 p.m. Thursday, 20 September 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 850 megalitres per day and to Tallowa Dam was 450 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.

14.9.07

23°C

Nil

1 254 ML

1 528 000 ML

59.1%

Sat.

15.9.07

28°C

1.0 mm

1 335 ML

1 527 500 ML

59.1%

Sun.

16.9.07

21°C

Nil

1 408 ML

1 527 000 ML

59.1%

Mon.

17.9.07

23°C

2.0 mm

1 515 ML

1 526 500 ML

59.1%

Tue.

18.9.07

19°C

Nil

1 306 ML

1 526 000 ML

59.0%

Wed.

19.9.07

20°C

Nil

1 124 ML

1 525 500 ML

59.0%

Thu.

20.9.07

22°C

0.2 mm

1 301 ML

1 525 000 ML

59.0%

 

Total supply for the week

      9 243 ML

Average daily supply during week

      1 320 ML

Volume pumped from Shoalhaven for the week

      4 168ML

Net weekly storage change (megalitres)

   - 3 260 ML

Net weekly storage change (percentage)

- 0.1 %

 

Available Water Storage as at 20 September 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 0.97

86,270

91.5

-1,690

Cordeaux

93,640

- 3.69

67,970

72.6

180

Avon

146,700

- 3.78

109,190

74.4

-90

Nepean

69,810

- 4.35

56,690

81.2

760

Woronora

71,790

- 10.32

40,450

56.3

-140

Warragamba

2,027,000

- 14.56

1,094,170

54.0

0

Prospect

8,870

- 0.30

7,340

82.8

-50

Wingecarribee

24,100

- 1.23

18,840

78.2

-230

Fitzroy Falls

10,000

- 0.49

7,530

75.3

-1,350

Tallowa*

35,300*

- 0.14

34,280*

97.1*

-600

Blue Mountains

2,790

 

2,500

89.6

-50

Total

2,584,300

 

1,525,230

59.0

-3,260


*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.