Triggers are used to initiate or cancel certain actions for an account, account host, account type or system in a resource assessment system. This page provides details of the different types of triggers available in Resource Assessment systems, along with types of actions that can be initiated.
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| Condition | Description |
|---|---|
| End of water year | Triggers an action at the end of the water year. |
| Function | Triggers an action using a defined function. The format of a function should be as follows: if( A > B,1,0), where “1” indicates the action will occur and “0” means the action will not happen. |
| Monthly trigger | Tiggers an action for a particular month. You must specify whether to offset from the start or end of the month, along with the number of days. |
| Per-timestep | Triggers an action per a specified number of time-steps. For example, if a monthly model, triggers an action per month or per several months. You can choose to reset the repeat interval at the start of each water year. |
| Season | Triggers an action for a specified season. You must define and start and end dates. |
| Specified date | Triggers an action on a specified date. |
| Start of water year | Triggers an action at the start of the water year. You can choose to repeat the action at a specified number of timesteps, and whether to reset the repeat interval at the start of each water year. |
| Storage level | Trigger based on a specified storage level. You must specify the storage, the level and whether the level is rising or falling. |
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| Anchor | ||||
|---|---|---|---|---|
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| Parameter | |
|---|---|
| Account Balance | The remaining volume/proportion of water available to an account (not including carryover). |
Carryover | The remaining volume/proportion of water available to an account that was carried over from the previous water year, ie. carryover balance. |
| Carryover Start of Water Year | At the start of the water year, the volume of water carried over from the previous water year. |
| Entitlement | Annual volumetric entitlement for an account. |
| Total Water | Account Balance + Carryover Balance. |
Available Water in Account Balance, or Available Account Balance | For Annual Accounting systems with Carryover Type set to Spillable and Water Available While Spillable disabled*: Max(0, Account Balance - Max(0, Spillable Water - Carryover Balance) - Minimum Balance) Else: Max(0, Account Balance - Minimum Balance) |
| Available Carryover | For Annual Accounting systems with Carryover Type set to Spillable and Water Available While Spillable disabled*: Max (0, Carryover Balance - Spillable water) Else: Max (0, Carryover Balance) |
| Available Water | For Annual Accounting systems with Carryover Type set to Spillable and Water Available While Spillable disabled*: Max(0, Account Balance + Carryover Balance - Spillable Water - Minimum Balance) Else: Max(0, Account Balance + Carryover Balance - Minimum Balance) |
| Order / Use Debit | Water debited from an account that time step. |
| Total Usage Water Year | Water debited from an account since the start of the water year.. |
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Figure 7. Transfer use trigger
Truncate Total Water
Truncates a specified parameter of an account or account type to a specified ratio or volume of another parameter (Figure 8, see Table 2 for parameter definitions). For example, in Figure 8, the total water for this account is limited to 50% entitlement. If the total water in this account is less than 50% entitlement, such as only 40% entitlement, then nothing is truncated, the total water in the account will remain as 40% entitlement.
Spillable water is treated similarly to the adjustment action, see Adjustment - Spillable Water.
Figure 8. Truncate total water trigger
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Figure 9. Per unit share allocation trigger
Re-assessment
This trigger is only available at the accounting system level. It reassesses the available resources based on the specified time-step. After available resources reassessment, the system will assign new allocation to water user based on this new re-assessed available resources.
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