Water storage and supply report - 18 December 2008


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

 

Warragamba

60 mm

Upper Nepean

50 mm

Woronora

60 mm

Shoalhaven

50 mm

Blue Mountains

65 mm

As at 3 pm Thursday, 18 December 2008, the inflow rate to Warragamba Dam including Shoalhaven transfers was 810  megalitres per day and to Tallowa Dam was 215 megalitres per day.

The available storage as at 3 pm Thursday, 11 December 2008 was 63.4%.

Date

24 hours to 8 a.m.

As at 3 p.m.

Sydney Max. Temp.

Sydney Rainfall

Bulk Water Supply

Available Storage

% Storage

Fri

12.12.08 

20°C

 4.0 mm

1 209 ML

 1 652 500 ML

63.3%

Sat

13.12.08 

33°C

 28.0 mm

1 213 ML

1 660 500 ML

63.7%

Sun

14.12.08 

 25°C

 Nil

1 351 ML

1 660 500 ML

 63.7%

Mon

15.12.08 

 25°C

Nil

1 362 ML

 1 660 500 ML

 63.7%

Tue

16.12.08 

 24°C

Nil

1 385 ML

 1 660 000 ML

 63.6%

Wed

17.12.08 

 24°C

Nil

 1 291 ML

 1 659 500 ML

 63.6%

Thu

18.12.08 

26°C

Nil

1 466 ML

 1 658 500 ML

63.6%

 

Total supply for the week

9 277 ML

Average daily supply during week

 1 325 ML

Volume pumped from Shoalhaven for the week

326 ML

Net weekly storage change (megalitres)

4 950 ML

Net weekly storage change (percentage)

 +0.2%

 

Available water storage as at 18 December 2008

Storage

Full operating storage (ML)

Storage level (m)

Available storage (ML)

Available storage (%)

Net weekly change (ML)

Cataract

94 300

-2.31 

75 930 

80.5 

Cordeaux

93 640

-1.60 

81 740 

87.3 

-710 

Avon

146 700

-3.22 

114 430 

78.0 

-100 

Nepean

69 810

-7.65 

47 860 

68.6 

-230 

Woronora

71 790

-11.06 

38 700 

53.9 

-130 

Warragamba

2 027 000

-12.42 

1 208 430 

59.6 

2 770

Prospect

33 300

-0.28 

31 840 

95.6 

150

Wingecarribee

24 100

-2.01 

15 720 

65.2 

110

Fitzroy Falls

10 000

-0.25 

8 760 

87.6 

100

Tallowa*

35 300*

-0.35 

 32 700*

92.6 *

2960

Blue Mountains

2 790

 

2 210 

79.2 

30

Total 

2 608 730 

 

1 658 320 

63.6 

4 950 

 

*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.

Graph of available water storage as at 18 December 2008