Daly
6.2 Groundwater allocation remaining - urban water system

Supporting information

The volume recognised in the water accounting statements (3,940 ML) represents the volume of groundwater allocation remaining for urban water supply licence entitlements in the Daly region at the end of the 2011–12 year.

The urban water supply licences relate to groundwater extraction from the Tindall aquifer for Katherine town supply.

Quantification approach

Data source

Water Resource Licensing database.

Provided by

Department of Land Resource Management.

Method

The water supply licences for Katherine have a water management year that ends on 30 April. Therefore, the allocation remaining at the end of the 2011–12 year for the Daly region is the unused component of the annual allocation for this urban licence.

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


Volume of groundwater allocation remaining for urban water supply at the start and end of the 2011–12 year

 

 

Account

Volume (ML)

 

Opening balance (at 30 June 2011)1

3,912

add

22.2 Groundwater allocation announcement (on 1 May 2012)

4,076

less

18.12 Groundwater allocation extraction (up to 30 June 2012)

757

less

14.2 Adjustment and forfeiture of groundwater allocation (on 30 April 2012)

3,291

 

Closing balance (at 30 June 2012)

3,940

1. Calculated based on data for the 2010–11 year, which are not reported in the water accounting statements

Assumptions, limitations, caveats and approximations

Nil.

Uncertainty information

The uncertainty estimate was not quantified.