Ord
6.2 Groundwater allocation remaining - urban water system

Supporting Information

The volume recognised in the water accounting statements (2,292 ML) represents the volume of allocation remaining for groundwater entitlements for urban purposes at the end of the 2010–11 year. Allocation remaining occurs because the dates of the 'water year' of each allocation do not match the dates of the 2010–11 year.

This item specifically refers to the volume remaining on 30 June 2011 on two licences held by Water Corporation (WA) for urban supply.

Groundwater urban allocation licences within the Ord region

Licensee

Volume remaining on 30 June 2011 (ML)

Water Corporation (WA) (Kununurra supply)

1,684

Water Corporation (WA) (Halls Creek supply)

608

Total

2,292


Quantification Approach

Data Source

Department of Water: Water Resource Licensing database and licensee meter readings.

Provided by

Department of Water.

Method

The allocation remaining was calculated as shown in the table below.

Volume of groundwater allocation remaining for the urban water system

 

 

Account

Volume (ML)

 

Opening balance (as at 30 June 2010)

2,355

add

22.2 Groundwater allocation announcements – urban system

2,700

less

18.12 Groundwater allocation extraction – urban system

1,774

less

14.2 Adjustment and forfeiture of groundwater allocation - urban system

989

 

Closing balance (as at 30 June 2011)

2,292

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

The following table compares the value for the 2009–10 year reported in this account with the corresponding value reported in the National Water Account 2010.

Comparative information from the 2010 Account for line item 6.2

2011 Account line item

2010 Account line item

Value reported in the 2010 Account (ML)

Value reported in the 2011 Account (ML)

Additional information

6.2 Groundwater allocation remaining - urban water system

9.1.3.4 Groundwater allocation remaining - urban holder

2,257

2,355

Change in line item name and number. Volume restated due to subsequent availability of actual meter readings

This has been restated because the Bureau used improved licence date information to calculate the remaining allocations on groundwater entitlements and other reconciliation discrepancies as at 30 June 2010.