Melbourne
18.12 Entitled extraction of allocated groundwater to urban water system
Supporting information
The zero volume reported by South East Water is inconsistent with records from the Victorian Water Register. The register records that South East Water extracted a volume of 3 ML under their entitlement to Koo Wee Rup Water Supply Protection Area—groundwater. It is unclear how this inconsistency arose; however, given the small volume the impact on the account is not considered material.
Quantification approach
South East Water
Data source
Internal database.
Provided by
South East Water.
Method
The volume reported is the smart meter (real-time) metered volume of water extracted from the Lang Lang bore.
This water is taken from groundwater to supply water tankers for irrigation. The stand pipe that extracts the water from the groundwater bore has been closed because of low demand, as a result of South East Water providing alternative solutions and high rainfall.
Assumptions, limitations, caveats and approximations
Assumes the meters and readings are accurate.
Uncertainty information
Meter type: Elster R2000 100 mm – uncertainty is +/–2%.
Western Water
Data source
IT database.
Provided by
Western Water.
Method
This volume is calculated as the total metered volume of groundwater taken from two Lancefield bores. Meters are located on pipes between the bores and the water treatment facility. Meter readings are recorded daily.
Bore |
Usage (ML) |
Lancefield Bore 2 |
0 |
Lancefield Bore 3 |
0 |
Assumptions, limitations, caveats and approximations
Nil.
Uncertainty information
Comparative year
In the 2012 Account, data provided has enabled urban water entitlements to groundwater to be reported separately in the Melbourne Account. Consequently, the volume has been restated as 12 ML.
Groundwater management unit | Entitlement holder | 2012 Account volume for the 2010–11 year (ML) | 2011 Account volume for the 2010–11 year (ML) |
Koo Wee Rup Water Supply Protection Area—groundwater | South East Water | 4 | reported as part of line item 18.11 |
Lancefield Groundwater Management Area | Western Water | 8 | reported as part of line item 18.11 |
Total extractions | 12 |