The Boundary Group Utilities contains Edit/Review, View Loadings, Import HSPF, and Check shown in Figure 1.
Figure 1 Boundary Group Utilities.
Edit/Review Boundary Conditions
The Edit/Review button provides access to the general Boundary Conditions Definitions/Groups group form shown in Figure 2. This form provides a listing of all the defined boundary groups by group ID. The list of boundary groups can be sorted by ID or listed in the order they are defined in the EFDC.INP file. In the top frame, Number of Boundary Groups, the number of the currently defined boundary groups, by type, are displayed. For details on how boundary groups work see Section 5.3.4.
A method to quickly define one or more boundary groups (where boundary condition details are to be added later) is available using the Batch Define button. This approach uses a P2D file with one or more polylines/polygons in a single file. If a polyline is open (i.e. the 1st and last point are not the same) EFDC_Explorer will select all of the cells the line intersects as one group. If the polyline is closed (i.e. the 1st and last point are the same) EFDC_Explorer will select all of the cells whose centroids are inside the polygon as one group.
As the user selects a boundary group from the list, summary information about the boundary group and its linkages to various boundary forcings is displayed. To edit a boundary group the user can double click on the group ID or press the Edit button.
When the user RMC 'ing on a group ID pops up a menu that allows the user to Insert (do the following options ( see Figure 3)
Edit: Modify the select group BC
New: add a new boundary group. When the user select New, a form will appears as shown in Figure 4. Put a BC ID and click OK button. Then a form of boundary type allows the user to assign to the boundary group. There are eight boundary types (Figure 5), the user just enter the number corresponding to boundary type ( e.g if the boundary type is flow,
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just enter 1) then click OK button.
Delete Group: delete the currently selected group only
Delete Group and Flows: delete the currently selected group and its flow series
Delete Group, Flows and Concentration Series: delete the currently selected group with its all associated series
Set Uniform Layer Flows: uniform flows by layer for the selected BC group
View: plot the time series of the primary forcing
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When using the time series plotting function from this tool, the model simulation start and end times define the minimum and maximum date range. If the time series is longer, the entire time series can be viewed from the Time Series editor.
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Figure 2 Boundary Condition Definitions/Groups.
Figure 3 Options when RMC on a Boundary Group.
Figure 4 Add a new Group BC.
Figure 5 Assign Boundary Type for a Boundary Group.
Import HSPF Data
The Import HSPF button provides access to the import function for the Hydrologic Simulation Program in Fortran (HSPF) (Bicknell et al., 2001). This is a hydrologic watershed modeling tool that is commonly used to predict flows and some water quality parameters. If this tool is used to predict the flows in a basin/watershed in which the EFDC model is being applied, then these results can be imported as boundary conditions for EFDC.
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The import tool, shown in Figure 36, works by linking the time series/HSPF files to specific boundary groups. The only groups that can have HSPF data linked to them are flow boundaries. Each group can have its own HSPF file and import options. Flow, temperature, solids and water quality are optionally selected in the Import Parameters Frame.
Figure 3 6 HSPF model results import utility.
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The View Loadings button brings up the loadings option form shown in Figure 47. This form shows the valid model timing (based on the model start and end times) and allows the user to select a date range to process within the model dates. The parameter to view is also shown. This list varies, depending on the computational options.
When the View button is selected, EFDC_Explorer computes the mass loadings time series for all of the flow type boundary groups selected and displays them in a plot. The units displayed will vary, depending on whether the user is configured to display metric (metric tons (MT) per day) or English (tons (2000 lbs.) per day). Figure 5 Figure 8 shows an example of mass loading (by group) for Total Phosphorus. To then compute the total mass loading for the time period displayed on the plot, press Ctrl-I to integrate the series (see Sect 9.2 for more details). Since the time units are days and the mass loading is MT/day, entering a 1 for the conversion factor results in the mass loading being reported in metric tons. Note that the user is now able to use concentration loadings rather than mass loadings as discussed in Section 5.15.5.
Figure 4 7 View loadings options form.
Figure 5 8 Example of mass loading plot for Total Phosphorus (TP).