Perth
17.13 Entitled diversion of allocated surface water to irrigation scheme
Supporting information
This line item volume (24,133 ML) represents the total surface water diverted for irrigation scheme supply in the Perth region during the 2011–12 year.
Total surface water diverted to each irrigation district in the Harvey Water Irrigation Area during the 2011–12 year is given in the table below.
Irrigation district |
Water diverted (ML) |
Harvey |
21,386 |
Waroona |
2,747 |
Total |
24,133 |
Quantification approach
Data source
Provided by
Method
Water inflow into the irrigation water supply system during the 2011–12 year is equal to the total annual water released from the storages. The water volumes released from the storages are metered at the outlet continuously and reported on a monthly basis.
Assumptions, limitations, caveats and approximations
Uncertainty information
Expected error for water meters is +/– 5%.
The Department of Water requires that all water meters, when tested under in situ conditions, must be within 5% accuracy across the full flow rate range (Guidelines for water meter installation 2009).
Comparative year
This line item corresponds to line item '17.13 Surface water allocation diversion – irrigation scheme' reported in the 2011 Account.