Excess GW Storage
This method category is dependent upon the selection of the Single Computed Outflow in the Solution Type category. The Excess GW Storage method is used to specify how excess groundwater will be modeled.
No Excess StorageThis is the default method. It performs no calculations.
There are no slots specific to this method.
Excess Storage to OutflowUsed if you want to specify a maximum possible storage in the aquifer. Any calculated storage that exceeds this value is converted to Outflow.
Slots Specific to This Method
Max GW Capacity
Type: TableSlot
Units: VOLUME
Description: Maximum storage capacity of the groundwater system
Information:
I/O: Optional; this slot is only used if it is input.
Links: Not linkable
Method Details
The calculated Storage value is first checked against Max GW Capacity. If Storage is greater than Max GW Capacity, excess storage is calculated as the difference between Storage and Max GW Capacity. Then, Storage is set equal to Max GW Capacity. The amount of excess storage is converted to a flow rate and added to the Outflow. If Storage is less than Max GW Capacity, nothing is done.
Excess Storage DivertUsed if you want to specify a maximum possible storage in the aquifer. Any calculated storage that exceeds this value is converted to a flow value and set in a separate, linkable slot.
Slots Specific to This Method
Max GW Capacity
Type: TableSlot
Units: VOLUME
Description: Maximum storage capacity of the groundwater system
Information:
I/O: Optional; this slot is not used if it is not input.
Links: Not linkable
Excess GW Outflow
Type: SeriesSlot
Units: FLOW
Description: Represents the required flow rate to dissipate any excess storage
Information: Calculated as the excess storage (Storage minus Max GW Capacity) divided by the timestep length.
I/O: Output only
Links: Can be linked to the Inflow slot on any object, the Return Flow slot on any object, or the Local Inflow slot on the Reach.
Method Details
The calculated Storage value is first checked against Max GW Capacity. If Storage is greater than Max GW Capacity, excess storage is calculated as the difference between Storage and Max GW Capacity. Then, Storage is set equal to Max GW Capacity. The amount of excess storage is converted to a flow rate and the value is set on the Excess GW Outflow slot. If Storage is less than Max GW Capacity, nothing is done.
Revised: 11/11/2019