Bulk water storage and supply report - 19 April 2007

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

  • Warragamba –                 Negligible
  • Upper Nepean –               3  mm  
  • Woronora -                       3  mm  
  • Shoalhaven –                   Negligible
  • Blue Mountains –             2  mm.

As at 3 p.m. Thursday, 19 April 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 620 megalitres per day and to Tallowa Dam was 210 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.

13.4.07

22°C

Nil

1 287 ML

  985 500 ML

38.1%

Sat.

14.4.07

23°C

Nil

1 262 ML

  985 000 ML

38.1%

Sun.

15.4.07

23°C

Nil

1 367 ML

  984 000 ML

38.1%

Mon.

16.4.07

25°C

0.6 mm

1 558 ML

  983 000 ML

38.0%

Tue.

17.4.07

24°C

Nil

1 429 ML

  982 000 ML

38.0%

Wed.

18.4.07

24°C

Nil

1 161 ML

  981 000 ML

38.0%

Thu.

19.4.07

24°C

Nil

1 243 ML

  980 000 ML

37.9%

 

Total supply for the week

9 307 ML

Average daily supply during week

1 330 ML

Volume pumped from Shoalhaven for the week

3 614 ML

Net weekly storage change (megalitres)

- 6 230 ML

Net weekly storage change (percentage)

- 0.3 %

 

Available Water Storage as at 19 April 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 9.54

33,490

35.5

350

Cordeaux

93,640

- 9.46

38,600

41.2

130

Avon

146,700

- 7.78

74,260

50.6

330

Nepean

69,810

- 4.63

55,900

80.1

-1,690

Woronora

71,790

- 19.82

21,770

30.3

-170

Warragamba

2,027,000

- 23.35

701,110

34.6

-1,150

Prospect

8,870

- 1.01

3,870

43.6

-1,300

Wingecarribee

24,100

- 1.32

18,500

76.8

-260

Fitzroy Falls

10,000

- 0.63

6,830

68.3

-1,930

Tallowa*

35,300*

- 1.58

23,540*

66.7*

-560

Blue Mountains

2,790

 

2,300

82.4

20

Total

2,584,300

 

980,170

37.9

-6,230


*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.