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Account Adjustment: Sum of Account adjustment due to adjustment triggers (exclude spill adjustment). Post Exit Phase. An example is to use adjustment trigger to subtract evaporation loss from account.
Account Balance: Balance of an account to keep track of water available for use or trade. This account records allocation made against entitlements throughout a water year, as well as water trades and use.
Account Balance = account balance from end of previous time step + increased allocation - usage -adjustment by triggers
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Available Water in Carryover: This is available water that can be used in carryover account balance (exclude non available spillable water).
Carryover: Balance of an carryover account to keep track of carry over water available for use or trade. Carryover is an arrangement that allows a water entitlement holder to take unused water allocations from previous water year into a new water year to use or trade
carryover = carryover balance from end of previous time step - usage - spill reduction - adjustment by triggers
Carryover Allocated： This is the water carried over from last water year and is allocated to an account in a new water year. For the total amount of water carried over from last water year, how much can be allocated is defined by modeller in "Carryover" column in Available Resource Versus Allocation ( ARA ) table.
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Effective Allocation: This is total amount (in percentage of entitlement )of water that has been allocated to an account, including water carried over from last water year and allocation from this water year, spill reduction is excludedis actually available to use or trade in a water year, including new allocations and carryover.
Effective Allocation = min (maximum effective allocation, (carryover start of water year + allocation - spill reduction water year) / Entitlement)
Max WDD: Maximum amount of without debit diversion
Number of Shares: Annual volumteric entitlements A right to take/use/extract/have water delivered over a water year.
Off Allocation Usage Today: Off allocation water used for current time step. Off allocation water, also called "Supplementary water" is effectively surplus flow that cannot be captured (regulated) into storages. When storm events result in flow that cannot be captured in storage structure such as dams or weirs for future use, and the water is not needed to meet current demand or commitments, then it is considered surplus to requirements.Supplementary flow events can occur in any regulated system at any time and therefore access is purely opportunistic. They can be triggered overnight and last for a day or two, a month or six months or more, depending on the river system and nature of the flow event.
Off Allocation Usage Water Year: Accumulative off allocation water usage from start of water year to current time step
Order/Use Debit: Water debited from accounts for current time-step. There are two debit types available for an account type: Order debit and Use debit. The difference of order debit and use debit is debit time and recredit . For order debit, water is debited from an account the moment water requirement passed up (could before extraction if there is travel time in upstream reaches) and if there is insufficient water available when actual extraction happens, the shortfall will recredit to the account. For use debit, water is debited from an account when actual extraction happens and only the actual extracted volume is debited from account, so no recredit is needed.
Spill Reduction: Spill deducted from spillable water accounts for current time step. Spill happens when water is discharged from a storage when there is more water in supply than demand for water. When water is spilling from a dam, spillable water account should have the same amount of water deducted.
Spill reduction water year: Accumulative spill reduction from start of water year to current time step
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