Bulk water storage and supply report - 10 May 2007

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

  • Warragamba –             Less than 5 mm
  • Upper Nepean –           Negligible
  • Woronora -                   Less than  5 mm
  • Shoalhaven –               Less than  5 mm
  • Blue Mountains –         10 mm.

As at 3 p.m. Thursday, 10 May 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 630 megalitres per day and to Tallowa Dam was 265 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.

4.5.07

29°C

Nil

1 234 ML

  985 000 ML

38.1%

Sat.

5.5.07

27°C

Nil

1 296 ML

  984 000 ML

38.1%

Sun.

6.5.07

25°C

Nil

1 374 ML

  983 000 ML

38.0%

Mon.

7.5.07

25°C

Nil

1 532 ML

  982 500 ML

38.0%

Tue.

8.5.07

22°C

Nil

1 393 ML

  981 500 ML

38.0%

Wed.

9.5.07

25°C

Nil

1 226 ML

  980 500 ML

37.9%

Thu.

10.5.07

22°C

0.8 mm

1 225 ML

  980 000 ML

37.9%

 

Total supply for the week

9 280 ML

Average daily supply during week

1 326 ML

Volume pumped from Shoalhaven for the week

3 808 ML

Net weekly storage change (megalitres)

-6 220 ML

Net weekly storage change (percentage)

- 0.3 %

 

Available Water Storage as at 10 May 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 7.68

42,340

44.9

200

Cordeaux

93,640

- 9.00

40,510

43.3

-170

Avon

146,700

- 7.83

73,850

50.3

-160

Nepean

69,810

- 5.76

52,800

75.6

-220

Woronora

71,790

- 17.82

25,090

34.9

-170

Warragamba

2,027,000

- 23.56

693,040

34.2

-3,450

Prospect

8,870

- 1.02

3,810

43.0

-90

Wingecarribee

24,100

- 1.27

18,680

77.5

-150

Fitzroy Falls

10,000

- 0.28

8,630

86.3

950

Tallowa*

35,300*

- 2.23

18,860*

53.4*

-2,900

Blue Mountains

2,790

 

2,220

79.6

-60

Total

2,584,300

 

979,830

37.9

-6,220


*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.