Water storage and supply report - 7 August 2008

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

Warragamba

14 mm

Upper Nepean

Less than 5 mm

Woronora

Negligible

Shoalhaven

37 mm

Blue Mountains

12 mm

As at 3 pm Thursday, 7 August 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 880 megalitres per day and to Tallowa Dam was 1,140  megalitres per day.

The available storage as at 3 p.m. Thursday, 31 July 2008 was 66.1%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri.

1.8.08

20 °C

Nil

1 285 ML

1 724 000 ML

66.1 %

Sat.

2.8.08

21 °C

Nil

1 228 ML

1 723 500 ML

66.1 %

Sun.

3.8.08

17 °C

Nil

1 342 ML

1 722 500 ML

66.0 %

Mon.

4.8.08

19 °C

Nil

1 377 ML

1 722 000 ML

66.0 %

Tue.

5.8.08

17 °C

Nil

1 325 ML

1 721 000 ML

66.0 %

Wed.

6.8.08

16 °C

Nil

1 203 ML

1 720 500 ML

66.0 %

Thu.

7.8.08

15 °C

0.4 mm

1 221 ML

1 721 500 ML

66.0%

 

Total supply for the week

8 982 ML

Average daily supply during week

1 283 ML

Volume pumped from Shoalhaven for the week

2 739ML

Net weekly storage change (megalitres)

-2 860 ML

Net weekly storage change (percentage)

-0.1 %

 

Available Water Storage as at 7 August 2008

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94 300

- 1.00

86 030

91.2

-930

Cordeaux

93 640

- 0.78

87 690

93.6

-300

Avon

146 700

- 1.97

126 560

86.3

-790

Nepean

69 810

- 4.71

55 680

79.8

-670

Woronora

71 790

- 8.65

44 630

62.2

-360

Warragamba

2 027 000

- 12.01

1 231 160

60.7

0

Prospect

33 300

- 0.56

30 430

91.4

-10

Wingecarribee

24 100

- 1.82

16 490

68.4

-170

Fitzroy Falls

10 000

-0.24

8 810 

88.1

-390

Tallowa*

35 300*

- 0.47

31 810*

90.1*

 770

Blue Mountains

2 790

 

2 200

78.9

-10

Total 

2 608 730 

 

1 721 490

66.0

-2 860


*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 7 August 2008