Bulk water storage and supply report - 13 September 2007

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

Warragamba –

30 mm

Upper Nepean –

25 mm

Woronora –

40 mm

Shoalhaven –

10 mm

Blue Mountains –

25 mm.

As at 3 p.m. Thursday, 13 September 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1200 megalitres per day and to Tallowa Dam was 660 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.

7.9.07

17°C

9.0 mm

1 153 ML

1 521 500 ML

58.9%

Sat.

8.9.07

17°C

10.0 mm

1 182 ML

1 524 500 ML

59.0%

Sun.

9.9.07

18°C

8.0 mm

1 181 ML

1 526 500 ML

59.1%

Mon.

10.9.07

17°C

Nil

1 259 ML

1 527 000 ML

59.1%

Tue.

11.9.07

19°C

Nil

1 198 ML

1 527 500 ML

59.1%

Wed.

12.9.07

22°C

Nil

1 214 ML

1 528 000 ML

59.1%

Thu.

13.9.07

22°C

Nil

1 335 ML

1 528 500 ML

59.1%

 

Total supply for the week

      8 521 ML

Average daily supply during week

      1 217 ML

Volume pumped from Shoalhaven for the week

      4 936 ML

Net weekly storage change (megalitres)

   + 7 460 ML

Net weekly storage change (percentage)

+ 0.2 %

 

Available Water Storage as at 13 September 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 0.75

87,960

93.3

490

Cordeaux

93,640

- 3.72

67,790

72.4

670

Avon

146,700

- 3.77

109,280

74.5

-100

Nepean

69,810

- 4.62

55,930

80.1

940

Woronora

71,790

- 10.26

40,590

56.5

500

Warragamba

2,027,000

- 14.56

1,094,170

54.0

4,690

Prospect

8,870

- 0.29

7,390

83.3

30

Wingecarribee

24,100

- 1.18

19,070

79.1

-20

Fitzroy Falls

10,000

- 0.23

8,880

88.8

640

Tallowa*

35,300*

- 0.06

34,880*

98.8*

-390

Blue Mountains

2,790

 

2,550

91.4

10

Total

2,584,300

 

1,528,490

59.1

7,460


*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.