Bulk water storage and supply report - 23 August 2007

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

Warragamba –

35 mm

Upper Nepean –

65 mm

Woronora -

90 mm

Shoalhaven –

30 mm

Blue Mountains –

105 mm

As at 3 p.m. Thursday, 23 August 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 2,970 megalitres per day and to Tallowa Dam was 1,120 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.

17.8.07

17°C

1.0 mm

1 257 ML

1 483 000 ML

57.4%

Sat.

18.8.07

20°C

Nil

1 237 ML

1 483 500 ML

57.4%

Sun.

19.8.07

18°C

14.0 mm

1 369 ML

1 483 000 ML

57.4%

Mon.

20.8.07

15°C

106.0 mm

1 200 ML

1 491 500 ML

57.7%

Tue.

21.8.07

16°C

5.0 mm

1 208 ML

1 499 500 ML

58.0%

Wed.

22.8.07

19°C

7.0 mm

1 208 ML

1 504 500 ML

58.2%

Thu.

23.8.07

17°C

0.6 mm

1 116 ML

1 508 500 ML

58.4%

 

Total supply for the week

      8 595 ML

Average daily supply during week

      1 228 ML

Volume pumped from Shoalhaven for the week

      4 687 ML

Net weekly storage change (megalitres)

   + 24 760 ML

Net weekly storage change (percentage)

+ 1.0 %

 

Available Water Storage as at 23 August 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 0.81

87,400

92.7

5,940

Cordeaux

93,640

- 4.04

65,850

70.3

1,670

Avon

146,700

- 3.92

107,880

73.5

1,480

Nepean

69,810

- 4.79

55,460

79.4

-1,620

Woronora

71,790

- 10.60

39,780

55.4

1,570

Warragamba

2,027,000

- 14.86

1,078,780

53.2

13,610

Prospect

8,870

- 0.36

7,030

79.3

740

Wingecarribee

24,100

- 1.17

19,090

79.2

500

Fitzroy Falls

10,000

- 0.13

9,380

93.8

260

Tallowa*

35,300*

+ 0.01

35,300*

100.0*

420

Blue Mountains

2,790

 

2,460

88.2

190

Total

2,584,300

 

1,508,410

58.4

24,760


*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.