Bulk water storage and supply report - 21 June 2007

The following rainfall (approximately) was recorded in the catchments since 7 June 2007:

  • Warragamba –                180 mm 
  • Upper Nepean –              300 mm 
  • Woronora -                      320 mm 
  • Shoalhaven –                   275 mm 
  • Blue Mountains –             280 mm.

As at 3 p.m. Thursday, 21 June 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 31,000 megalitres per day and to Tallowa Dam was 22,000 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.

15.6.07

14°C

74 mm

1 236 ML

1 031 500 ML

39.9%

Sat.

16.6.07

16°C

90 mm

1 170 ML

1 071 500 ML

41.5%

Sun.

17.6.07

17°C

20 mm

1 172 ML

1 169 500 ML

45.3%

Mon.

18.6.07

16°C

2 mm

1 190 ML

1 208 500 ML

46.8%

Tue.

19.6.07

15°C

37 mm

1 193 ML

1 224 500 ML

47.4%

Wed.

20.6.07

13°C

55 mm

1 375 ML

1 246 000 ML

48.2%

Thu.

21.6.07

17°C

Nil

1 149 ML

1 291 000 ML

50.0%

 

Total supply for the week

       8 484 ML

Average daily supply during week

       1 212 ML

Volume pumped from Shoalhaven for the week

       1 140 ML

Net weekly storage change (megalitres)

+ 276 750 ML

Net weekly storage change (percentage)

       + 10.8   %

 

Available Water Storage as at 

21 June 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 2.80

72,360

76.7

25,650

Cordeaux

93,640

- 5.51

57,450

61.4

16,340

Avon

146,700

- 5.17

96,530

65.8

20,300

Nepean

69,810

+ 0.20

69,810

100.0

16,790

Woronora

71,790

- 12.12

36,290

50.6

9,030

Warragamba

2,027,000

- 18.97

882,510

43.5

184,480

Prospect

8,870

- 0.33

7,190

81.1

1,070

Wingecarribee

24,100

- 0.80

20,640

85.6

1,100

Fitzroy Falls

10,000

+ 0.13

10,000

100.0

1,150

Tallowa*

35,300*

+ 0.63

35,300*

100.0*

700

Blue Mountains

2,790

 

2,790

100.0

140

Total

2,584,300

 

1,290,870

50.0

276,750


*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.