Bulk Water Storage & Supply Report - 26 April 2007

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

  • Warragamba –                    5  mm  
  • Upper Nepean –                40  mm  
  • Woronora -                      100  mm 
  • Shoalhaven –                    25  mm  
  • Blue Mountains –              20  mm .

 

As at 3 p.m. Thursday, 26 April 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 710 megalitres per day and to Tallowa Dam was 620 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.

20.4.07

23°C

Nil

1 217 ML

  979 000 ML

37.9%

Sat.

21.4.07

25°C

Nil

1 379 ML

  978 000 ML

37.8%

Sun.

22.4.07

25°C

Nil

1 467 ML

  977 000 ML

37.8%

Mon.

23.4.07

23°C

41.0 mm

1 440 ML

  976 000 ML

37.8%

Tue.

24.4.07

20°C

59.0 mm

1 142 ML

  975 000 ML

37.7%

Wed.

25.4.07

20°C

23.0 mm

1 146 ML

  987 000 ML

38.2%

Thu.

26.4.07

17°C

9.0 mm

1 319 ML

  988 000 ML

38.2%

 

Total supply for the week

9 109 ML

Average daily supply during week

1 301 ML

Volume pumped from Shoalhaven for the week

3 699 ML

Net weekly storage change (megalitres)

7 990 ML

Net weekly storage change (percentage)

+ 0.3 %

 

Available Water Storage as at 26 April 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 8.06

40,420

42.9

6,930

Cordeaux

93,640

- 9.11

40,050

42.8

1,450

Avon

146,700

- 7.81

74,010

50.4

-250

Nepean

69,810

- 5.32

54,000

77.4

-1,900

Woronora

71,790

- 17.89

24,970

34.8

3,200

Warragamba

2,027,000

- 23.40

699,190

34.5

-1,920

Prospect

8,870

- 0.99

3,960

44.6

90

Wingecarribee

24,100

- 1.32

18,470

76.6

-30

Fitzroy Falls

10,000

- 0.27

8,650

86.5

1,820

Tallowa*

35,300*

- 1.78

22,140*

62.7*

-1,400

Blue Mountains

2,790

 

2,300

82.4

0

Total

2,584,300

 

988,160

38.2

7,990


*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.