Bulk water storage and supply report - 2 August 2007

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

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

As at 3 p.m. Thursday, 2 August 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,200 megalitres per day and to Tallowa Dam was 800 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.

27.7.07

23°C

Nil

1 174 ML

1 487 000 ML

57.5%

Sat.

28.7.07

21°C

Nil

1 259 ML

1 487 000 ML

57.5%

Sun.

29.7.07

18°C

Nil

1 263 ML

1 487 500 ML

57.6%

Mon.

30.7.07

16°C

Nil

1 385 ML

1 488 000 ML

57.6%

Tue.

31.7.07

17°C

Nil

1 302 ML

1 488 500 ML

57.6%

Wed.

1.8.07

19°C

Nil

1 308 ML

1 488 000 ML

57.6%

Thu.

2.8.07

24°C

Nil

1 279 ML

1 487 500 ML

57.6%

 

Total supply for the week

      8 969 ML

Average daily supply during week

      1 281 ML

Volume pumped from Shoalhaven for the week

      3 045 ML

Net weekly storage change (megalitres)

  +   730 ML

Net weekly storage change (percentage)

       + 0.1 %

 

Available Water Storage as at 2 August 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.65

80,920

85.8

390

Cordeaux

93,640

- 4.37

63,890

68.2

240

Avon

146,700

- 4.23

105,010

71.6

-370

Nepean

69,810

- 1.89

63,890

91.5

-1,690

Woronora

71,790

- 11.12

38,560

53.7

-70

Warragamba

2,027,000

- 15.17

1,063,150

52.4

2,520

Prospect

8,870

- 0.44

6,660

75.1

20

Wingecarribee

24,100

- 1.21

18,950

78.6

-210

Fitzroy Falls

10,000

- 0.25

8,750

87.5

-40

Tallowa*

35,300*

+ 0.06

35,300*

100.0*

30

Blue Mountains

2,790

 

2,390

85.7

-90

Total

2,584,300

 

1,487,470

57.6

730


*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.