South East Queensland
11.5 Delivery of water from outside region to urban water system

The volumetric value for the line item at the end of the 2011–12 year was 22,902 ML.

This line item consists of water transferred into the urban water supply system (including potable and non-potable water), wastewater collection system and recycled water supply system from outside the South East Queensland (SEQ) region.  

There were no wastewater, recycled water or non-potable water transfers into the SEQ region. The table below shows the potable water imports to the SEQ region during the 2011–12 reporting period.

The following table shows the potable water imports to the SEQ region during the 2011–12 year.

Seqwater WaterHub database metered data for the NPI (meter M-096-BT and meter M-097-BT) provided by LinkWater. Seqwater WaterHub database, this information was previously provided by DERM but commencing with the 2012 Account, it has been provided by Seqwater.

Department of Energy and Water Supply (DEWS).

Import from the SunshineCoast via the NPI (North Pipeline Inerconnector) was measured by the NPI master meter at:

• stage 1 – main to NPI at Old Gympie Road (meter M-096-BT)

• stage 2 – main to NPI at Nobels Road (meter M-097-BT).

The meter readings, recorded by LinkWater, are daily time steps summed to provide an annual total.

None.

The uncertainty was not quantified.

Seqwater WaterHub database, suburb consumption data.

Bureau of Meteorology.

Import from the Sunshine Coast via the local reticulation system was calculated from the consumption data obtained from the Seqwater WaterHub database multiplied by a leakage percentage. Landers Shute water treatment plant (WTP) supplies southerly flow to the Narangba-Morayfield area and North Pine (postcodes 4551, 4550, 4517, 4518 and 4519).

Imported potable water consumption of 4,032 ML was obtained from the Seqwater WaterHub database for these areas for the 2011–12 reporting period.

The leakage percentage for the Sunshine Coast regional council was determined using the total consumption of 19,305 ML and a leakage estimate of 3,546 ML, giving a leakage rate of 18%.

• Area-based weighting of consumption per postcode assumes that the consumption occurs equally throughout each postcode.

• It was assumed that the average leakage rate throughout the Sunshine Coast regional council area occurred within these postcodes.

• More or less leakage may have occurred due to various factors, including pipe age, pipe material, pressure and local geology.

Derived from metered data. Ungraded.

Seqwater WaterHub database, suburb consumption data.

Bureau of Meteorology.

Import from North Stradbroke Island was equal to the production from the North Stradbroke Island WTP less the consumption from postcode 4184 (islands of Macleay, Russel, Karrangarra, Lamb and Coochiemudlo). The outflow through the North Stradbroke Island outlet meter M-013-BS was obtained from the SEQ Water Grid Manager WaterHub database. The consumption from postcode 4184 was extracted from the DEWS WaterHub database.

Based on metered data in WaterHub provided by Department of Energy and Water Supply (DEWS), the North Stradbroke Island production figure was only the production of the North Stradbroke Island WTP. As this production was only based on one meter, this cannot be broken down into the volume transferred to the SEQ region and the volume used locally to service communities on North Stradbroke Island. A slight overestimate of the volume transferred into the SEQ region will have occurred, although this volume is expected to be minor.

Derived from metered data. Ungraded.