The South East Queensland Region
Overview of the 2012–13 year
The South East Queensland (SEQ) region is located on the southeast coast of Queensland. Its boundaries are defined by the New South Wales–Queensland State border in the south, the Pacific Ocean in the east, the top of the Great Dividing Range in the west, and the headwaters of the Brisbane River in the north. Mountains exist along the western and southern edges of the region, while coastal plains dominate the east. The main rivers in the region are the Albert, Bremer, Brisbane, and Logan.
Water in the region is primarily supplied from surface water sources. There are 26 major surface water storages in the region with a total capacity of almost 2,600,000 ML, of which Wivenhoe, Somerset, Hinze, North Pine, and Wyaralong provide more than 80 per cent of the total capacity. In the heavily populated areas around Brisbane, the City of Gold Coast, Logan City, and Ipswich, potable water is supplied through the SEQ water grid that connects water storages, weirs, water treatment plants, groundwater bore fields, and a desalination plant, increasing the region's resilience to drought. This is a distinct feature of the region's water infrastructure.
For the second year in a row, rainfall across the region for 2012–13 was above average. These rainfall conditions did not increase much inflow into urban storages. Essentially, the high water volume at the start of the accounting year (or 'carried over from the 2011–12 year') was further increased through 2012–13. By 30 June 2013, the region's storage volume was at 99% of capacity. Closing net water assets in the region were 2,555,783 ML, compared to 2,479,700 ML at the end of the 2011–12 year. For more information on the region's water assets refer to Water accounting statements.
Surface water is the primary water source for the urban water supply system. For the 2012–13 year, the volume of surface water diverted for urban supply and the volume supplied to users were greater than that of the 2011–12 year. The water supply system received 224,420 ML from surface water, 158 ML from groundwater, 2,805 ML from desalinated water, and a further 24,514 ML imported from the Sunshine Coast (via the Northern Pipeline Interconnector) and North Stradbroke Island (via the Eastern Pipeline Interconnector). Furthermore, 17,549 ML of recycled water was supplied for urban use.
The key water account information for the region during the 2012–13 year is presented in the following table. Information on the uncertainty associated with the volumes presented in the table is provided in the relevant sections of the account.
Key water account information for the SEQ region during the 2012–13 year
|Rainfall: 1,151 mm||Rainfall: 1,143 mm||Rainfall: 971 mm|
|Evapotranspiration: 838 mm||Evapotranspiration: 919 mm||Evapotranspiration: 847 mm|
|For more detail on the SEQ climate refer to Climate overview.|
|Brisbane River||Logan River||Bremer River|
|well above mean annual flow||well above mean annual flow||well above mean annual flow|
|For more detail on streamflow in the SEQ region refer to Water overview.|
|Total water assets (as at 30 June)||2,567,936||2,491,853|
|Total water liabilities (as at 30 June)||12,153||12,153|
|Change in net water assets||76,083||261,401|
|Closing net water assets||2,555,783||2,479,700|
|For more detail on water assets and water liabilities refer to Water accounting statements.|
Notes: Water resources and systems
|30 June 2013||30 June 2012|
|Total capacity||Volume||% capacity||Volume||% capacity|
|2,593,703 ML||2,554,869 ML||99||2,479,671 ML||96|
|For more detail on surface water storage in the SEQ region refer to Surface water.|
|Total water abstracted|
|Surface water: 243,069 ML||Surface water: 235,384* ML||Groundwater abstraction increased 35%|
|Groundwater: 5,300 ML||Groundwater: 3,925 ML|
|For more detail on water abstraction in the SEQ region refer to Surface water and Groundwater.|
|Total water supplied|
|251,897 ML||243,213 ML||High dependence on surface water|
|For more detail on the urban water system in the SEQ region refer to Urban water system.|
* Total surface water abstracted in the 2011–12 year reported in the 2012 Account has been restated from 228,317 ML to 235,384 ML in the 2013 Account.