Bulk water storage and supply report - 27 September 2007

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

Warragamba –

Less than 5mm

Upper Nepean –

Less than 5mm

Woronora –

5 mm

Shoalhaven –

Less than 5mm

Blue Mountains –

Negligible.

As at 3 p.m. Thursday, 27 September 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 770 megalitres per day and to Tallowa Dam was 370 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.

21.9.07

19°C

4.0 mm

1 250 ML

1 525 000 ML

59.0%

Sat.

22.9.07

19°C

Nil

1 244 ML

1 525 000 ML

59.0%

Sun.

23.9.07

16°C

Nil

1 358 ML

1 524 500 ML

59.0%

Mon.

24.9.07

18°C

Nil

1 423 ML

1 524 000 ML

59.0%

Tue.

25.9.07

27°C

Nil

1 329 ML

1 523 500 ML

59.0%

Wed.

26.9.07

20°C

Nil

1 253 ML

1 523 000 ML

58.9%

Thu.

27.9.07

20°C

0.4 mm

1 396 ML

1 522 500 ML

58.9%

 

Total supply for the week

      9 254 ML

Average daily supply during week

      1 322 ML

Volume pumped from Shoalhaven for the week

      3 699ML

Net weekly storage change (megalitres)

   - 2 890 ML

Net weekly storage change (percentage)

- 0.1 %

 

Available Water Storage as at 27 September 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.20

84,440

89.5

-1,830

Cordeaux

93,640

- 3.67

68,090

72.7

120

Avon

146,700

- 3.79

109,100

74.4

-90

Nepean

69,810

- 4.13

57,310

82.1

620

Woronora

71,790

- 10.38

40,300

56.1

-150

Warragamba

2,027,000

- 14.57

1,093,650

54.0

-520

Prospect

8,870

- 0.30

7,350

82.9

10

Wingecarribee

24,100

- 1.35

18,360

76.2

-480

Fitzroy Falls

10,000

- 0.53

7,340

73.4

-190

Tallowa*

35,300*

- 0.18

33,960*

96.2*

-320

Blue Mountains

2,790

 

2,440

87.5

-60

Total

2,584,300

 

1,522,340

58.9

-2,890


*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.