Bulk water storage and supply report - 12 April 2007

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

  • Warragamba –                    5   mm
  • Upper Nepean –                20   mm
  • Woronora -                        40   mm
  • Shoalhaven –                    10   mm
  • Blue Mountains –              20   mm.

As at 3 p.m. Thursday, 12 April 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 700 megalitres per day and to Tallowa Dam was 325 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.

6.4.07

25°C

Nil

1 189 ML

  989 000 ML

38.3%

Sat.

7.4.07

21°C

24.0 mm

1 236 ML

  988 500 ML

38.3%

Sun.

8.4.07

21°C

13.0 mm

1 232 ML

  988 500 ML

38.3%

Mon.

9.4.07

23°C

2.0 mm

1 189 ML

  988 500 ML

38.3%

Tue.

10.4.07

23°C

Nil

1 258 ML

  988 500 ML

38.3%

Wed.

11.4.07

24°C

Nil

1 266 ML

  987 500 ML

38.2%

Thu.

12.4.07

27°C

Nil

1 372 ML

  986 500 ML

38.2%

 

Total supply for the week

8 741 ML

Average daily supply during week

1 249 ML

Volume pumped from Shoalhaven for the week

5 232 ML

Net weekly storage change (megalitres)

- 3 230 ML

Net weekly storage change (percentage)

- 0.1 %

 

Available Water Storage as at 12 April 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 9.62

33,140

35.1

900

Cordeaux

93,640

- 9.49

38,470

41.1

360

Avon

146,700

- 7.82

73,930

50.4

820

Nepean

69,810

- 4.03

57,590

82.5

-980

Woronora

71,790

- 19.71

21,940

30.6

-70

Warragamba

2,027,000

- 23.32

702,260

34.6

-1,150

Prospect

8,870

- 0.74

5,170

58.3

-1,420

Wingecarribee

24,100

- 1.25

18,760

77.8

400

Fitzroy Falls

10,000

- 0.25

8,760

87.6

270

Tallowa*

35,300*

- 1.50

24,100*

68.3*

-2,400

Blue Mountains

2,790

 

2,280

81.7

40

Total

2,584,300

 

986,400

38.2

-3,230


*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.