Bulk water storage and supply report - 16 August 2007

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

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

As at 3 p.m. Thursday, 16 August 2007, the inflow rate to Warragamba Dam including Shoalhaven transfers was 880 megalitres per day and to Tallowa Dam was 680 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.

10.8.07

23°C

Nil

1 314 ML

1 485 500 ML

57.5%

Sat.

11.8.07

23°C

Nil

1 311 ML

1 485 000 ML

57.5%

Sun.

12.8.07

25°C

Nil

1 420 ML

1 484 500 ML

57.4%

Mon.

13.8.07

21°C

Nil

1 431 ML

1 484 000 ML

57.4%

Tue.

14.8.07

16°C

Nil

1 345 ML

1 484 000 ML

57.4%

Wed.

15.8.07

15°C

2.0 mm

1 227 ML

1 483 500 ML

57.4%

Thu.

16.8.07

17°C

0.4 mm

1 196 ML

1 483 500 ML

57.4%

 

Total supply for the week

      9 245 ML

Average daily supply during week

      1 321 ML

Volume pumped from Shoalhaven for the week

      3 364 ML

Net weekly storage change (megalitres)

   - 2 450 ML

Net weekly storage change (percentage)

       - 0.1 %

 

Available Water Storage as at 

16 August 2007

Storage

Full Operating Storage (ML)

Storage Level (m)

Available Storage (ML)

Available Storage (%)

Net Weekly Change (ML)

Cataract

94,300

- 1.58

81,460

86.4

310

Cordeaux

93,640

- 4.32

64,180

68.5

120

Avon

146,700

- 4.08

106,400

72.5

750

Nepean

69,810

- 4.21

57,080

81.8

-3,400

Woronora

71,790

- 11.27

38,210

53.2

-160

Warragamba

2,027,000

- 15.13

1,065,170

52.5

510

Prospect

8,870

- 0.51

6,290

70.9

-280

Wingecarribee

24,100

- 1.29

18,590

77.1

-90

Fitzroy Falls

10,000

- 0.18

9,120

91.2

140

Tallowa*

35,300*

- 0.06

34,880*

98.8*

-270

Blue Mountains

2,790

 

2,270

81.4

-80

Total

2,584,300

 

1,483,650

57.4

-2,450

*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.