Ord
17.4 Surface water leakage to landscape
Supporting information
The volume recognised in the water accounting statements (19 ML) represents the total leakage from surface water storages within the Ord region to the landscape.
The total annual seepage at each storage where seepage data are collected during the 2012–13 year is given in the following table.
Storage |
Seepage (ML) |
Lake Argyle |
2 |
Lake Moochalabra |
17 |
Total |
19 |
Quantification approach
Data source
Provided by
Method
Instantaneous seepage data (L/s) are measured at storages within the Ord region on an approximately daily basis. These data were inputted to Hydstra and converted to daily volume data (ML) to determine the total annual seepage (in ML) at each storage.
Assumptions, limitations, caveats and approximations
Seepage data are only collected at Lake Argyle and Lake Moochalabra within the Ord region. It is assumed that no seepage has occurred at the remaining unmetered storages. Consequently, the reported leakage volume of 19 ML is likely to be an underestimate.
It is assumed that the dam seepage measuring points reflect the total seepage from the storages.