Bulk water storage and supply report - 5 July 2007

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

  • Warragamba –                   8 mm 
  • Upper Nepean –              10 mm 
  • Woronora -                         7 mm 
  • Shoalhaven –                      6 mm 
  • Blue Mountains –                7 mm.

As at 3 p.m. Thursday, 5 July 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 4,200 megalitres per day and to Tallowa Dam was 3,600 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.

29.6.07

14°C

3.0 mm

1 265 ML

1 386 500 ML

53.7%

Sat.

30.6.07

18°C

Nil

1 329 ML

1 406 000 ML

54.4%

Sun.

1.7.07

16°C

Nil

1 303 ML

1 418 000 ML

54.9%

Mon.

2.7.07

16°C

Nil

1 357 ML

1 425 000 ML

55.1%

Tue.

3.7.07

19°C

Nil

1 226 ML

1 430 500 ML

55.4%

Wed.

4.7.07

23°C

Nil

1 143 ML

1 434 500 ML

55.5%

Thu.

5.7.07

21°C

Nil

1 342 ML

1 437 500 ML

55.6%

 

Total supply for the week

       8 965 ML

Average daily supply during week

       1 281 ML

Volume pumped from Shoalhaven for the week

       3 045 ML

Net weekly storage change (megalitres)

  + 64 790 ML

Net weekly storage change (percentage)

       + 2.5 %

 

Available Water Storage as at 

 5 July 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 2.18

76,900

81.5

1,340

Cordeaux

93,640

- 4.86

61,060

65.2

1,460

Avon

146,700

- 4.46

102,900

70.1

2,630

Nepean

69,810

+ 0.04

69,810

100.0

0

Woronora

71,790

- 11.40

37,910

52.8

540

Warragamba

2,027,000

- 16.14

1,014,930

50.1

59,010

Prospect

8,870

- 0.34

7,140

80.5

-360

Wingecarribee

24,100

- 0.91

20,190

83.8

320

Fitzroy Falls

10,000

- 0.27

8,660

86.6

-90

Tallowa*

35,300*

+ 0.10

35,300*

100.0*

0

Blue Mountains

2,790

 

2,650

95.0

-60

Total

2,584,300

 

1,437,450

55.6

64,790


*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.