The volume recognised in the Statement of Water Assets and Water Liabilities represents the volume of surface water allocation remaining for urban supply licence entitlements at the end of the reporting period (30 June 2010).
Western Australian Department of Water: Water Resource Licensing database.
Western Australian Department of Water.
For all but one of the 14 surface water Urban Supply licences, the licensed water management year is from 1 July to 30 June. For these licences, any unused allocation at the end of the water management year is forfeited and, therefore, the allocation remaining at the end of the reporting period is zero.
The water supply licence for Dwellingup has a water management year that ends on 30 September. Therefore, the allocation remaining at the end of the reporting period (30 June 2010) for the Perth region is the unused component of the annual allocation for the Dwellingup water resource.
The allocation remaining was calculated as shown in the table below.
|
|
Dwellingup account |
Volume (ML) |
|---|---|---|
|
|
Opening balance (as at 1 July 2009) |
106 |
|
add |
Allocation announcement |
167 |
|
less |
Abstraction up to 30 June 2010 |
81 |
|
less |
Forfeiture (on 30 Sept 2009) |
90 |
|
|
Closing balance (as at 30 June 2010) |
102 |
Ungraded.
Nil.