Bulk water storage and supply report - 22 March 2007

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

  • Warragamba –                 20   mm
  • Upper Nepean –               30   mm
  • Woronora -                       20   mm
  • Shoalhaven –                   30   mm
  • Blue Mountains –             35   mm.

As at 3 p.m. Thursday, 22 March 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,290 megalitres per day and to Tallowa Dam was 465 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.

16.3.07

26°C

Nil

1 385 ML

  992 000 ML

38.4%

Sat.

17.3.07

33°C

Nil

1 395 ML

  991 500 ML

38.4%

Sun.

18.3.07

27°C

8.0 mm

1 376 ML

  992 500 ML

38.4%

Mon.

19.3.07

23°C

Nil

1 427 ML

  993 000 ML

38.4%

Tue.

20.3.07

25°C

4.0 mm

1 287 ML

  994 000 ML

38.5%

Wed.

21.3.07

29°C

Nil

1 296 ML

  994 500 ML

38.5%

Thu.

22.3.07

29°C

Nil

1 337 ML

  995 000 ML

38.5%

 

Total supply for the week

9 504 ML

Average daily supply during week

1 358 ML

Volume pumped from Shoalhaven for the week

6 712 ML

Net weekly storage change (megalitres)

  + 3 130 ML

Net weekly storage change (percentage)

  + 0.1 %

 

Available Water Storage as at  22 March 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 10.06

31,270

33.2

1,240

Cordeaux

93,640

- 9.74

37,460

40.0

690

Avon

146,700

- 8.16

71,170

48.5

1,690

Nepean

69,810

- 3.73

58,450

83.7

30

Woronora

71,790

- 19.42

22,410

31.2

-90

Warragamba

2,027,000

- 23.23

705,720

34.8

1,540

Prospect

8,870

- 0.34

7,140

80.5

0

Wingecarribee

24,100

- 1.24

18,810

78.0

-130

Fitzroy Falls

10,000

- 0.34

8,330

83.3

-330

Tallowa*

35,300*

- 0.44

32,060*

90.8*

-1,540

Blue Mountains

2,790

 

2,200

78.9

30

Total

2,584,300

 

995,020

38.5

3,130


*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.