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The changes in this beta will be available in the next Source production release due out at the end of December 2022.

This release includes:

  • Updates to the Storage Ownership logic.
  • Modifications to the Operations Tabular Editor.
  • Bug fixes for the Environmental Flow node.

Updates to Storage Ownership logic

In Source 5.14 Beta and Source 5.16 changes were made to allow "Internal spilling to be specified by Owner". This added a new option to 'Ownership' in storage and weir nodes allowing an owner to 'Use Airspace'. Following testing and feedback from those releases, further changes have been made in this release to address a number of identified issues. These changes include:

  • A new proportional loss calculation method has been introduced.
  • The 'Use airspace' option can be used when internal spilling is disabled.
  • The 'Use Airspace' owner can receive water internally spilled from other owners, if it is below its specified capacity share (not allowing this could cause incorrect spill calculations).
  • Fixes for negative and close to zero ownership values in storage ownership.
  • Improved test coverage of storage ownership.

The new proportional loss calculation method has been separated out into an independent implementation from the original storage ownership methodology to allow for comparison of results between the old and new versions. It is expected that the new method will be adopted as part of the next production release, in December 2022, at which point the dual implementation will be removed.

Details of the changes are outlined in Changes to Ownership in Storages.

Fixes for negative and close to zero ownership values were made in common code shared by both the old and new methods, as such some very small result changes have been identified through regression tests.

Regression Testing

There is no tolerance in our regression test suite to allow for earlier identification of results being different on different machines or versions of operating systems. 

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Details here: /wiki/spaces/SC/pages/51651480

Full Release Documentation

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