Bulk water storage and supply report - 31 May 2007

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

  • Warragamba –                 Less than 5 mm 
  • Upper Nepean –               Less than 5 mm 
  • Woronora -                       Less than 5 mm 
  • Shoalhaven –                   Less than 5 mm 
  • Blue Mountains –              5  mm.

As at 3 p.m. Thursday, 31 May 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 485 megalitres per day and to Tallowa Dam was 155 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.

25.5.07

21°C

Nil

1 291 ML

  969 500 ML

37.5%

Sat.

26.5.07

21°C

Nil

1 299 ML

  968 500 ML

37.5%

Sun.

27.5.07

19°C

Nil

1 276 ML

  967 500 ML

37.4%

Mon.

28.5.07

21°C

Nil

1 392 ML

  966 000 ML

37.4%

Tue.

29.5.07

23°C

Nil

1 379 ML

  965 000 ML

37.3%

Wed.

30.5.07

24°C

Nil

1 204 ML

  964 000 ML

37.3%

Thu.

31.5.07

20°C

Nil

1 281 ML

  963 000 ML

37.3%

 

Total supply for the week

9 122 ML

Average daily supply during week

1 303 ML

Volume pumped from Shoalhaven for the week

1 740 ML

Net weekly storage change (megalitres)

-7 260 ML

Net weekly storage change (percentage)

- 0.3 %

 

Available Water Storage as at 31 May 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 7.62

42,650

45.2

-570

Cordeaux

93,640

- 9.42

38,760

41.4

-1,080

Avon

146,700

- 7.89

73,360

50.0

-240

Nepean

69,810

- 5.87

52,510

75.2

-240

Woronora

71,790

- 18.07

24,660

34.4

-190

Warragamba

2,027,000

- 23.84

682,440

33.7

-4,840

Prospect

8,870

- 0.89

4,430

49.9

700

Wingecarribee

24,100

- 1.38

18,230

75.6

-290

Fitzroy Falls

10,000

- 0.16

9,250

92.5

300

Tallowa*

35,300*

- 2.82

14,760*

41.8*

-840

Blue Mountains

2,790

 

2,190

78.5

30

Total

2,584,300

 

963,240

37.3

-7,260


*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.