A new option called 'Use Airspace' has been added to 'Ownership' in storage and weir nodes as of Source 5.16. In this release further changes have been made to the ownership in storages calculations to better support this functionality.
Description and rationale
In some circumstances certain storage owners may be able to exceed their share of storage temporarily. These owners should only spill when external spill occurs, and they should be the first to spill in that case. The owner who can exceed their share using the available airspace is called an airspace owner. There are certain conditions of ownership while enabling this functionality.
The two options are:
- Owner Capacity Share Proportion - the original calculation method (default)
- Owner Working Volume Proportion - the new calculation method
In order to use the 'Use Airspace' option for an owner, the Owner Working Volume Proportion method must now be selected for the scenario. The option changes calculation for all storages in the scenario, not only those using the 'Use Airspace' option for an owner.