The table below shows the potable water imports to the South East Queensland (SEQ) region during the 2009–10 reporting period.
| Import | Data source | Volume (ML) |
|---|---|---|
| Sunshine Coast via Northern Pipeline Interconnector | SEQ Water Grid Manager WaterHub database | 11,353 |
| Sunshine Coast via local reticulation system | Queensland Water Commission WaterHub database | 4,753 |
| North Stradbroke Island | SEQ Water Grid Manager WaterHub database | 8,978 |
| Total SEQ region | 25,084 |
| Description | Calculation | Volume (ML) |
|---|---|---|
| North Stradbroke Island Water Treatment Plant production | 9,446 | |
| Consumption of postcode 4184 | Subtract | 468 |
| Equals | 8,978 |
This line item comprises three different data-sets:
The method for each data-set is shown below.
SEQ Water Grid Manager WaterHub Database metered data for the NPI (meter M-096-BT and meter M-097-BT) provided by LinkWater.
SEQ Water Grid Manager.
Import from the Sunshine Coast via the NPI was measured by the NPI master meter at:
The meter readings, recorded by LinkWater, are daily time steps summed to provide an annual total.
Derived from metered data. Ungraded.
None.
Queensland Water Commission (QWC) 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 QWC WaterHub database multiplied by a leakage percentage. Landers Shute Water Treatment Plant (WTP) supplies southerly flow to the Narangba–Morayfield area and North Pine in the Moreton water resource plan (WRP) area (postcodes 4551, 4550, 4517, 4518 and 4519).
Imported potable water consumption of 4219 ML was obtained from the QWC WaterHub database for these areas for the 2009–10 reporting period.
The leakage percentage for the Sunshine Coast Regional Council was determined using the total consumption of 26,075 ML and a leakage estimate of 2,807 ML, giving a leakage rate of 10.8%.
Derived from metered data. Ungraded.
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.
Queensland Water Commission (QWC) WaterHub database, suburb consumption data.
Bureau of Meteorology.
Import from North Stradbroke Island is 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 QWC WaterHub database.
Derived from metered data. Ungraded.
Based on meter-read data in WaterHub provided by Seqwater and LinkWater. The North Stradbroke Island production figure is only the production of the North Stradbroke Island WTP. As this production is only based on one meter, the SEQ Water Grid Manager cannot break down the volume transferred to the SEQ region and the volume used locally to service communities on North Stradbroke Island.