In the Groundwater frame (Figure 1) the user can select a range of groundwater interaction options. The user should review the EFDC code to ensure the option specification and EFDC function for the groundwater parameters. The current options are:
Option 0 Disable groundwater interaction;
Option 1 Allow soil wetting and drying;
Option 2 Allow groundwater interaction (using GWMAP and GWSER), and
Option 3 Apply a constant groundwater flux out of the model by zones (using GWSEEP and GWMAP, and available for EFDC_DSI + only).
The Modify Series button gives access to the groundwater class data (Option 3). The number of series is input in the appropriate box and then the grid allows the user to specify the groundwater class data. As with the vegetation class data, the ID and the Description are used only by EFDC_Explorer.
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The Apply Polygon button is similar in function to the Apply Overlays button but does not require a matching ID in the polygon file. Open the polygon file and then specify the groundwater class, and then click the Apply button to assign all the cells that are inside the polygon to that groundwater class.
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Figure 1 Domain Tab: Boundary Conditions for Groundwater.