Bulk water storage and supply report - 5 April 2007

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

  • Warragamba –                less than 5   mm
  • Upper Nepean –              less than 5   mm
  • Woronora -                      less than 5   mm
  • Shoalhaven –                    5   mm
  • Blue Mountains –             25   mm.

As at 3 p.m. Thursday, 5 April 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 715 megalitres per day and to Tallowa Dam was 380 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.

30.3.07

24°C

0.4 mm

1 184 ML

  994 000 ML

38.5%

Sat.

31.3.07

25°C

Nil

1 208 ML

  993 000 ML

38.4%

Sun.

1.4.07

22°C

0.4 mm

1 461 ML

  992 500 ML

38.4%

Mon.

2.4.07

23°C

Nil

1 587 ML

  992 000 ML

38.4%

Tue.

3.4.07

26°C

Nil

1 348 ML

  991 000 ML

38.3%

Wed.

4.4.07

24°C

11.0 mm

1 364 ML

  990 500 ML

38.3%

Thu.

5.4.07

23°C

Nil

1 347 ML

  989 500 ML

38.3%

 

Total supply for the week

9 499 ML

Average daily supply during week

1 357 ML

Volume pumped from Shoalhaven for the week

5 859 ML

Net weekly storage change (megalitres)

- 4 870 ML

Net weekly storage change (percentage)

- 0.2 %

 

Available Water Storage as at 5 April 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 9.83

32,240

34.2

90

Cordeaux

93,640

- 9.58

38,110

40.7

120

Avon

146,700

- 7.92

73,110

49.8

810

Nepean

69,810

- 3.70

58,540

83.9

-110

Woronora

71,790

- 19.67

22,010

30.7

-240

Warragamba

2,027,000

- 23.29

703,410

34.7

-1,540

Prospect

8,870

- 0.45

6,590

74.3

-400

Wingecarribee

24,100

- 1.35

18,360

76.2

-510

Fitzroy Falls

10,000

- 0.30

8,490

84.9

-540

Tallowa*

35,300*

- 1.18

26,500*

75.1*

-2,560

Blue Mountains

2,790

 

2,240

80.3

10

Total

2,584,300

 

989,600

38.3

-4,870


*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.