South East Queensland
22.1 Groundwater allocation announcements

Supporting Information

a. Overall

This line item represents the groundwater allocation announcement in the Benefitted Area of the Central Lockyer water supply scheme (WSS). As no groundwater entitlements in this area were held by urban utilities, all groundwater allocation announcements were listed in this line item.

b. Benefitted Area definition

In the Lockyer Valley Groundwater Management Area (GMA), within the Central Lockyer Water Supply Scheme (WSS) there is an area known as Benefitted Area for which groundwater licences are available. Benefited Areas are the equivalent of a regulated surface water resource. The Benefitted Area uses managed aquifer recharge via discharge of water from water storages to watercourses to recharge the groundwater. Of the Central Lockyer WSS's metered, licensed groundwater extractions, 1,113 ML was extracted from the Benefitted Area during the 2010–11 year. This was included as line item 18.11 Groundwater allocation extraction.

The volume extracted from Non-Benefitted Area during the 2010–11 year was not available at the time of publication. This volume was included as line item 18.8 Non-allocated extractions to users.

c. Central Lockyer interim groundwater entitlements

Currently, interim groundwater entitlements exist within the Central Lockyer WSS. These do not have volumetric limits, and therefore announced allocations cannot be made for individual entitlement holders. However, there is a nominal groundwater entitlement for the entire Central Lockyer WSS. Under the interim resource operation licence (IROL), the water-sharing rules provide for extraction up to the Central Lockyer WSS groundwater limit, with a provision that when individual allocations are set, groundwater allocation announcement rules should be used.

Given the intent for groundwater allocation announcement rules, for the purpose of the 2011 Account, Central Lockyer WSS has been considered to have a system with groundwater allocation announcements, extractions and forfeiture.

Although there are more Groundwater Management Areas (GMAs) within the South East Queensland (SEQ) region, only information for the Lockyer Valley GMA Benefitted Area has been included within the line items listed below:

For the purpose of the 2011 Account, other GMAs are not considered to have this entitlement system at present. As groundwater entitlements evolve in the SEQ region and the announcement, extractions and forfeiture model is implemented, other GMAs may also be included within these line items. In the 2011 Account, any extractions from other GMAs (where volumes are available) was included in line item 18.8 Non–allocated extractions to users.

d. Groundwater allocation remaining – reconciliation

The following table shows the ground water allocation reconciliation. Due to the very wet year, irrigation demand was significantly lower than in previous years resulted in a higher than usual forfeiture of groundwater allocation.

Groundwater allocation reconciliation table
Calculation Line item Moreton WRP area
Volume
(ML)
 

6.1 Groundwater allocation remaining (as at 1 July 2010)

0
add

22.1 Groundwater allocation announcements

9,340
less

18.11 Groundwater allocation extraction

1,113
less

6.1 Groundwater allocation remaining (as at 30 June 2011)

0
equals

14.1 Adjustment and forfeiture of groundwater allocation

8,227

Quantification Approach

Data Source

Queensland Department of Environment and Resource Management (DERM), water resource plan (WRP) and Central Lockyer Interim Resource Operation Licence.

Provided by

DERM.

Method

Although no formal groundwater allocation announcement occurred, the Central Lockyer WSS groundwater limit of 9,340 ML for the Benefitted Area has been used as the groundwater allocation announcement value. This was obtained from the Central Lockyer IROL.

There are no GMAs in the Gold Coast or Logan Basin WRP areas; therefore, groundwater limits are not applicable.

Assumptions, Limitations, Caveats and Approximations

None.

Uncertainty Information

There was no uncertainty associated with this value.

Comparative year

This line item corresponds to line item 27.1.3.7 Groundwater allocation announcement – other lumped holders reported in the 2010 Account.