17.5 Overbank flood spilling
The volumetric value for the line item for the 2010–11 year was 652,699 ML. The line item represents flood waters that have overflowed the river channel top of bank (includes flood water to flood plains but excludes flood waters to seasonally connected wetlands and other surface water stores).
The following table summarises the information for the line item for the Murray–Darling Basin (MDB) region.
|Surface water resource plan area||
Sustainable diversion limit area
|SW19 Warrego – Paroo – Nebine||SS29||Paroo||Qld||8|
|SW16 Qld Border Rivers||SS24||Qld Border Rivers||Qld||187,050|
|Sub-total Northern Basin||652,699|
|Total for the region||652,699|
Overbank flood spilling is classified as an unregulated event. The line item is applicable to several jurisdictions within the region. However, volumes for this line item were only available for Queensland. The volumes shown in the above table have been classified under the unsupplemented entitlement class within Queensland.No information was available for the other water resource plan areas for this line item.
Assumptions, Limitations, Caveats and Approximations
Information on all flood waters that have overflowed from the river channels was not available.
In the reported volume for the line item, it is possible that whole volume may not be from overflows from river channels because it was not possible to distinguish between harvesting from landscape and river overflows.