EEMS provides the user with a number of options for continuing a model run that has stopped prematurely for some reason, or if it has crashed. These include Continuation runs for carrying on from where the model ended, and Restart, for carrying on the run from another time earlier in the run. The EFDC Restart Options are contained in Timing / Linkage in the Model Control form. After a right-mouse click on the Restart Options, the EFDC Model Restart Options form is displayed as shown in Figure 1. An explanation of the terms used, as well as how to use each option, is provided below in detail. Users of these features should be aware that they cannot change the model BC locations and type from the original model to the model using the restart file. Doing so may result in flows going to the locations in the model that no longer have a valid BC.
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Figure 1. EFDC Model Restart Options
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Figure 2. EFDC Model Restart Options: Cold Start
- Restart
Restart is applicable when a model has stopped prematurely and has finished the run. The user can use it to restart from the point at which it terminated or some other point by selecting the appropriate restart file. In this case, there is a hard restart from the time selected. EFDC will create a whole new set of output files which the user will then need to merge later. Figure 3 shows the Restart option.
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It is standard practice to always select Use and then set Output Frequency to 1 to be the same as the duration of the reference periods. The user must have this option turned on in order to use restart as this creates the files required for the restart. The Date Stamp can be left unchecked so that the file is written over each time it outputs.
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Figure 7. Output Options for Restart Files
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