South East Queensland
18.9 Non-allocated extractions - urban water system

Supporting Information

This line item consists of diversions from groundwater based on unsupplemented entitlements held by urban utilities and the South East Queensland (SEQ) Water Grid Manager The table below shows the breakdown of groundwater extracted in the SEQ region. All groundwater extractions for urban purposes occured within the Moreton Water Resource Plan area.

Volume of groundwater extracted by urban utilities within the South East Queensland region
Water treatment plant SEQ Water Grid connection Volume
(ML)
Algester Road Y 0
Chandler  Y 0
Forest Lake  Y 0
Runcorn  Y 0
Sunnybank  Y 79
Dayboro  N 121
Linville  N 13
Total SEQ region 213

Due to the 2010–11 year being wetter than previous years, and the urban allocation announcements (line item 21.2 Surface water allocation announcements – urban water system) being 100% for the 2010–11 year, reliance upon localised groundwater for urban supply within the SEQ region was reduced.

Quantification Approach

Data Source

Queensland Water Commission (QWC), WaterHub database.

Provided by

QWC.

Method

The volume of groundwater extracted for water supply in the 2010–11 year was calculated by summing the water produced at all groundwater treatment plants that feed from a groundwater source within the SEQ region.

Assumptions, Limitations, Caveats and Approximations

There may have been some loss of water during the treatment process; therefore, the volume of water extracted from the source will be an underestimate.

Groundwater treatment plants on Bribie Island and Stradbroke Island were not considered as they are located outside the National Water Account definition of the SEQ region. The volume of water produced from these plants was quantified as an import to the SEQ region.

Uncertainty Information

Derived from measured data. Estimated in the range +/– 20%.

Comparative year

This line item corresponds to line item 19.3.2 Unregulated inflow of groundwater into the urban water supply system reported in the 2010 Account, which had a value of 456 ML.