Water storage and supply report - 30 October 2008

 

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

Warragamba

Less than 5 mm

Upper Nepean

Less than 5 mm

Woronora

7 mm

Shoalhaven

Less than 5 mm

Blue Mountains

10 mm

As at 3 pm Thursday, 30 October 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 460 megalitres per day and to Tallowa Dam was 290  megalitres per day.

The available storage as at 3 p.m. Thursday, 23 October 2008 was 65.9%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri.

24.10.08

 16°C

2.0 mm 

1 261 ML 

1 719 000 ML 

65.9% 

Sat.

25.10.08

20°C 

 Nil

1 242 ML

1 718 500 ML 

65.9% 

Sun.

26.10.08 

24°C

 Nil

1 467 ML

1 717 500 ML 

65.8%

Mon.

27.10.08

24°C 

 Nil

1 633 ML

1 716 000 ML 

65.8% 

Tue.

28.10.08 

34°C 

 Nil

1 374 ML 

1 713 500 ML 

65.7%

Wed.

29.10.08 

22°C

6.0 mm

1 291 ML

1 712 500 ML 

65.6% 

Thu.

30.10.08 

17°C 

8.0 mm 

 1 303 ML

1 712 000 ML 

65.6%

 

Total supply for the week

9 570 ML 

Average daily supply during week

1 367 ML 

Volume pumped from Shoalhaven for the week

  588 ML 

Net weekly storage change (megalitres)

 - 7 370 ML

Net weekly storage change (percentage)

- 0.3 % 

 

Available Water Storage as at 30 October 2008

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94 300

-1.85

79 390 

84.2 

-380 

Cordeaux

93 640

-0.92 

86 650 

92.5

70 

Avon

146 700

-2.76 

118 810

81.0 

-860 

Nepean

69 810

-5.00 

54 880 

78.6 

140 

Woronora

71 790

-10.00 

41 230 

57.4 

-440 

Warragamba

2 027 000

-11.85 

1 240 040 

61.2 

-5 560 

Prospect

33 300

-0.57 

30 360 

91.2

-100 

Wingecarribee

24 100

-1.99 

15 800 

65.6 

150 

Fitzroy Falls

10 000

-0.48

7 590 

75.9 

-1 560 

Tallowa*

35 300*

-0.06 

34 880* 

98.8* 

1 220 

Blue Mountains

2 790

 

2 170 

77.8 

-50 

Total 

2 608 730 

 

1 711 800 

65.6

- 7 370


*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.
Graph of available water storage as at 30 October 2008