General Slots
Figure 2.1 shows the general slots on the Storage Account. The arrows leading into and out of the account represent supplies. The “m” indicates the slot is a multi-slot, which can be linked to more than one other slot, as represented by the multiple arrows.
Figure 2.1 General slots on the Storage Accounts
Accrual
Type: Series Slot
Units: Volume
Alternate Units: NA
Description: Cumulative volume of inflows to the account from the Begin Accrual Date to the current timestep
I/O: Input (at initial timestep) or Account Solution
Links: No
Begin Year Allocation
Type: Series Slot
Units: Volume
Alternate Units: NA
Description: Volume allocated to account on begin Accrual Date. This value is then used in the solution equation in place of the previous storage. The begin year allocation allows the user to specify the initial storage for the accrual period.
I/O: Input or Rules
Links: No
Carry Over
Type: Series Slot
Units: Volume
Alternate Units: NA
Description: Volume of water carried over to the Begin Accrual Date from previous storage
I/O: Input, Rule, or set by the Account-level Method
Links: No
Diversion
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water diverted out of the storage account and transferred to a diversion account
I/O: Input or set by a rule
Links: Yes, to Diversion slot on a Diversion account
Gain Loss
Type: Series Slot
Units: Volume
Alternate Units: Flow
Description: A loss or gain due to local effects including evaporation, seepage, precipitation. This gain or loss represents this account’s allocation of the physical loss on the reservoir object. A gain is positive, a loss is negative.
I/O: Input, Rule, or Object-level Accounting Method
Links: No
Inflow
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water transferred into this account from upstream
I/O: Propagated from upstream
Links: Yes, from an upstream account
Maximum Accrual1
Type: Series Slot
Units: Volume
Alternate Units: NA
Description: This slot represents the maximum accrual that is allowed during the accrual period. Maximum Accrual is not used in the account solution or in the water rights allocation but is available to hold data for viewing and use in Object-level Accounting Methods and Rules.
I/O: Input or Rule
Links: No
Outflow
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water transferred out of this account downstream
I/O: Input or Rule
Links: Yes, to a downstream account
Return Flow
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water entering the storage account as return flow from a diversion account
I/O: Input, Rule, or Propagated
Links: Yes, to Return Flow slot on a diversion account
Slot Inflow
Type: Series Slot
Units: Flow
Alternate Units: Volume
Description: Water added to the account from a local source. This Slot Inflow represents this accounts allocation of the local inflows that enter the reservoir object
I/O: Input, Rule, or Object-level Accounting Method
Links: No
Storage
Type: Series Slot
Units: Volume
Alternate Units: NA
Description: Storage balance in the account
I/O: Input (at initial timestep) or Account Solution
Links: No
Transfers In
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water transferred into this account from another account on the same object
I/O: Input, Rule, or Propagated
Links: Yes, from a Transfers Out slot on another account on the same object
Transfers Out
Type: Multi Slot
Units: Flow
Alternate Units: Volume
Description: Water transferred out of this account to another account on the same object
I/O: Input, Rule, or Propagated
Links: Yes, to a Transfers In slot on another account on the same object
1 Maximum Accrual is not yet used by SolveWaterRights()
Revised: 08/03/2021