Bulk water storage and supply report - 19 July 2007

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

  • Warragamba –               Negligible
  • Upper Nepean –             Negligible
  • Woronora -                     Negligible
  • Shoalhaven –                 Negligible 
  • Blue Mountains –           Negligible.

As at 3 p.m. Thursday, 19 July 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 2,230 megalitres per day and to Tallowa Dam was 1,640 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.

13.7.07

17°C

Nil

1 266 ML

1 472 500 ML

57.0%

Sat.

14.7.07

15°C

0.2 mm

1 235 ML

1 475 000 ML

57.1%

Sun.

15.7.07

16°C

Nil

1 243 ML

1 477 500 ML

57.2%

Mon.

16.7.07

15°C

Nil

1 385 ML

1 478 500 ML

57.2%

Tue.

17.7.07

15°C

Nil

1 271 ML

1 479 000 ML

57.2%

Wed.

18.7.07

15°C

Nil

1 248 ML

1 479 000 ML

57.2%

Thu.

19.7.07

14°C

Nil

1 346 ML

1 479 000 ML

57.2%

 

Total supply for the week

      8 994 ML

Average daily supply during week

      1 285 ML

Volume pumped from Shoalhaven for the week

      1 305 ML

Net weekly storage change (megalitres)

  + 9 910 ML

Net weekly storage change (percentage)

       + 0.4 %

 

Available Water Storage as at 19 July 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.78

79,920

84.8

840

Cordeaux

93,640

- 4.47

63,300

67.6

640

Avon

146,700

- 4.19

105,380

71.8

740

Nepean

69,810

- 0.84

67,140

96.2

-1,800

Woronora

71,790

- 11.06

38,700

53.9

100

Warragamba

2,027,000

- 15.33

1,055,080

52.1

14,110

Prospect

8,870

- 0.44

6,640

74.9

-50

Wingecarribee

24,100

- 1.13

19,280

80.0

-1,190

Fitzroy Falls

10,000

- 0.86

5,710

57.1

-3,400

Tallowa*

35,300*

+ 0.03

35,300*

100.0*

0

Blue Mountains

2,790

 

2,550

91.4

-80

Total

2,584,300

 

1,479,000

57.2

9,910


*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.