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 equally proportionally within the model. The priority ordering system addresses situations encountered in water resource models such as the following:
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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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Transfer of Ownership
The transfer of ownership has two options regarding ordering priorities:
- Maintain downstream ratio
- Override ratios and assign to one priority level (re-prioritise orders - see user guide).
Storage
Two options at a storage node that have an impact on the prioritisation of orders
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Maximum Order
The maximum order can truncate orders being passed upstream to a specified value. If this is the case, we try and preserve the highest priority volume of water being passed upstream. This is done by removing the lower priority orders until the total is less the maximum specified.
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