Bulk water storage and supply report - 7 December 2006

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

  • Warragamba – 5 mm
  • Upper Nepean – 10 mm
  • Woronora - 15 mm
  • Shoalhaven – 5 mm
  • Blue Mountains – 10 mm.

As at 3 p.m. Thursday, 7 December 2006, the inflow rate to Warragamba Dam was negligible and to Tallowa Dam was 30 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.

1.12.06

23°C

Nil

1 566 ML

  981 500 ML

38.0%

Sat.

2.12.06

32°C

0.2 mm

1 557 ML

  979 500 ML

37.9%

Sun.

3.12.06

26°C

24.0 mm

1 517 ML

  977 500 ML

37.8%

Mon.

4.12.06

19°C

0.4 mm

1 502 ML

  975 500 ML

37.7%

Tue.

5.12.06

22°C

Nil

1 320 ML

  973 500 ML

37.7%

Wed.

6.12.06

23°C

Nil

1 446 ML

  971 500 ML

37.6%

Thu.

7.12.06

25°C

Nil

1 572 ML

  970 000 ML

37.5%

 

Total supply for the week

10 480 ML

Average daily supply during week

1 497 ML

Volume pumped from Shoalhaven for the week

54 ML

Net weekly storage change (megalitres)

- 13 070ML

Net weekly storage change (percentage)

- 0.5%

 

Available Water Storage as at 7 December 2006

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 10.04

31,350

33.2

-420

Cordeaux

93,640

- 8.97

40,640

43.4

-420

Avon

146,700

- 10.00

56,880

38.8

-450

Nepean

69,810

- 6.96

49,630

71.1

-470

Woronora

71,790

- 19.30

22,600

31.5

-250

Warragamba

2,027,000

- 22.71

725,740

35.8

-10,350

Prospect

8,870

- 1.13

3,270

36.9

-50

Wingecarribee

24,100

- 1.66

17,130

71.1

-330

Fitzroy Falls

10,000

- 0.45

7,740

77.4

-220

Tallowa*

35,300*

- 3.11

12,770*

36.2*

-100

Blue Mountains

2,790

 

2,030

72.8

-10

Total

2,584,300

 

969,780

37.5

-13,070


*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.