Bulk water storage and supply report - 15 March 2007

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

  • Warragamba –                 10   mm
  • Upper Nepean –               30   mm
  • Woronora -                       25   mm
  • Shoalhaven –                     5    mm
  • Blue Mountains –              20   mm.

As at 3 p.m. Thursday, 15 March 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 1,350 megalitres per day and to Tallowa Dam was 520 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.

9.3.07

29°C

5.0 mm

1 344 ML

  989 000 ML

38.3%

Sat.

10.3.07

24°C

Nil

1 330 ML

  990 000 ML

38.3%

Sun.

11.3.07

25°C

Nil

1 463 ML

  990 500 ML

38.3%

Mon.

12.3.07

27°C

Nil

1 535 ML

  991 000 ML

38.3%

Tue.

13.3.07

24°C

3.0 mm

1 299 ML

  992 000 ML

38.4%

Wed.

14.3.07

22°C

2.0 mm

1 180 ML

  992 500 ML

38.4%

Thu.

15.3.07

25°C

Nil

1 337 ML

  992 000 ML

38.4%

 

Total supply for the week

9 489 ML

Average daily supply during week

1 356 ML

Volume pumped from Shoalhaven for the week

5 987 ML

Net weekly storage change (megalitres)

  + 6 940 ML

Net weekly storage change (percentage)

  + 0.3 %

 

Available Water Storage as at 15 March 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 10.36

30,030

31.8

2,650

Cordeaux

93,640

- 9.92

36,770

39.3

960

Avon

146,700

- 8.37

69,480

47.4

1,990

Nepean

69,810

- 3.74

58,420

83.7

-400

Woronora

71,790

- 19.36

22,500

31.3

-70

Warragamba

2,027,000

- 23.27

704,180

34.7

3,460

Prospect

8,870

- 0.34

7,140

80.5

350

Wingecarribee

24,100

- 1.21

18,940

78.6

70

Fitzroy Falls

10,000

- 0.27

8,660

86.6

-490

Tallowa*

35,300*

- 0.23

33,600*

95.2*

-1,630

Blue Mountains

2,790

 

2,170

77.8

50

Total

2,584,300

 

991,890

38.4

6,940


*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.