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Objects and Methods : Computational Subbasin : User Methods : Reach Gain Loss
Reach Gain Loss
This category is dependent on selection of the Link to MODFLOW 2000 RIP ET method in the Groundwater Computation category; see “Link to MODFLOW 2000 RIP ET”. This category should be used in conjunction with the “Reach Stage” category on which a method other than “None” should be selected.
* None
This is the default method. There are no slots associated with this method.
* Summation
Note:  RiverWare’s connection with MODFLOW is currently not functional. This method has been disabled and cannot be selected. An error will be posted at model load if this method was previously selected. Contact CADSWES for help.
The river GainLoss for each cell(s) in the Reach Stage and GainLoss Map slot is gathered from MODFLOW and set in the Reach GainLoss from MODFLOW slot. For each Reach, the individual gain/losses will be summed and mapped to the Reach.Total MODFLOW GainLoss slot. Figure 8.9 shows the summation equation.
Slots Specific to This Method
 Reach Stage and GainLoss Map
Type: Table slot
Units: No units
Description: Maps MODFLOW cell(s) to a Reach specified on the subbasin
Information: The layer, row, and column of each MODFLOW RIV cell is input by the user and the corresponding Reach object needs to be set as the row title. The sum of the Inflow Stage Weight and Outflow Stage Weight for a single cell should add up to 1.
I/O: Input only
 
 
Layer
Row
Column
Inflow Stage Weight
Outflow Stage Weight
Reach1
1
1
4
0.8
0.2
Reach1
1
2
4
0.5
0.5
Reach2
1
8
4
0.6
0.4
Reach2
1
9
4
0.3
0.7
 Reach GainLoss from MODFLOW
Type: Table Series slot
Units: Flow
Description: Each MODFLOW RIV cell specified in the Reach Stage and GainLoss Map slot contains a river GainLoss value transferred from MODFLOW. The column labels are automatically defined at the beginning of the run, MODFLOW initialization. The user unit configuration (cfs, ft3/day, and so on) selected on this slot must match with the units used in MODFLOW.
Information: Transferred to RiverWare from MODFLOW.
I/O: Output only
Figure 8.9  GainLoss Summation Equation
Revised: 11/11/2019