Bulk water storage and supply report - 12 July 2007

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

  • Warragamba –              11   mm 
  • Upper Nepean –            29   mm 
  • Woronora -                    42   mm 
  • Shoalhaven –                31   mm 
  • Blue Mountains –          17   mm.

As at 3 p.m. Thursday, 12 July 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 5,700 megalitres per day and to Tallowa Dam was 5,300 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.

6.7.07

16°C

Nil

1 347 ML

1 444 000 ML

55.9%

Sat.

7.7.07

18°C

Nil

1 353 ML

1 446 000 ML

56.0%

Sun.

8.7.07

18°C

Nil

1 334 ML

1 447 000 ML

56.0%

Mon.

9.7.07

13°C

50.0 mm

1 342 ML

1 450 500 ML

56.1%

Tue.

10.7.07

16°C

24.0 mm

1 129 ML

1 456 500 ML

56.4%

Wed.

11.7.07

15°C

0.6 mm

1 190 ML

1 462 500 ML

56.6%

Thu.

12.7.07

15°C

0.4 mm

1 239 ML

1 469 000 ML

56.8%

 

Total supply for the week

       8 935 ML

Average daily supply during week

       1 276 ML

Volume pumped from Shoalhaven for the week

       2 175 ML

Net weekly storage change (megalitres)

  + 31 640 ML

Net weekly storage change (percentage)

       + 1.2 %

 

Available Water Storage as at 12 July 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.89

79,080

83.9

2,180

Cordeaux

93,640

- 4.58

62,660

66.9

1,600

Avon

146,700

- 4.27

104,640

71.3

1,740

Nepean

69,810

- 0.27

68,940

98.8

-870

Woronora

71,790

- 11.10

38,600

53.8

690

Warragamba

2,027,000

- 15.61

1,040,970

51.4

26,040

Prospect

8,870

- 0.43

6,690

75.4

-450

Wingecarribee

24,100

- 0.84

20,470

84.9

280

Fitzroy Falls

10,000

- 0.18

9,110

91.1

450

Tallowa*

35,300*

+ 0.21

35,300*

100.0*

0

Blue Mountains

2,790

 

2,630

94.3

-20

Total

2,584,300

 

1,469,090

56.8

31,640


*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.