Ordering priorities allow users in Source to specify how shortfalls are prioritised between different demands in Source. Without a priority system enabled, Source will shortfall all demands proportionally within the model. The priority ordering system addresses situations encountered in water resource models such as the following:
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Version
Source full version 4.1.19
Assumptions and Dependencies
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| Anchor | ||||
|---|---|---|---|---|
|
Scenario | Allow Order | Extract Water | Result |
1 | True | True | Standard case |
2 | True | False | Priorities have no effect on the flow phase. |
3 | False | True | Water will be extracted independently of the priorities |
4 | False | False | No effect |
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Flow Phase
In the flow phase the shortfall priorities will inform the supply point on the volume of water it is able to extract. It tries to ensure that orders of higher priority are maintained and equalises access at the supply point's priority level.
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- Maintain downstream ratio
- Override ratios and assign to one priority level (re-prioritise orders - see user guide).
Note: Priority ordering will override ownership if they both turned on in a system. When there is not enough water in the system, borrow and payback will work to make sure higher priority demand get water prior to lower priority demand. |
Storage
Two Three options at a storage node that have an impact on the prioritisation of orders
Gauged Release - Gauged release has a higher priority than the highest priority order in the system.
Pass Orders Through – The priority of the upstream orders will be the same as that of the downstream orders.
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