Sydney
17.16 Other delivery of allocated surface water
Supporting Information
The volume for this line item is 7,532 ML.
The Sydney Catchment Authority (SCA) manages banked environmental flow in the Sydney region.
SCA released a volume of 28 ML/day of the banked environmental flow from Warragamba Dam from 5 October 2010 to 30 June 2011. This event used 7,532 ML.
Reconciliation of this line item is shown in the following table.
Calculation |
Line item |
Volume (ML) |
|
5.6 Other surface water liability – opening balance |
9,795 |
add |
3,100 |
|
less |
17.16 Other delivery of allocated surface water |
7,532 |
less |
0 |
|
equals |
Closing balance (as at 30 June 2011) |
5,363 |
Quantification Approach
Data Source
Provided by
Method
For 2010–11, the released banked environmental flow volume was derived from orifice-rating tables and stream gauging downstream of environmental flow release from Warragamba Dam. The banked environmental flow was reduced by the released volume.
Assumptions, Limitations, Caveats and Approximations
Uncertainty Information
The volume is based on measured data. Estimated uncertainty based on accuracy of stream gauging is +/– 10%.
Comparative year
The following table compares the value at 30 June 2010 reported in this account with the corresponding value reported in the 2010 Account.
2011 Account line item |
2010 Account line item |
Value reported in the 2010 Account (ML) |
Value reported in the 2011 Account (ML) |
Additional information |
17.16 Other delivery of allocated surface water |
14.7.9.7 Allocation diversion of regulated flows – other lumped holders |
2,450 |
2,450 |
Change in line item name and number |