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The Load 3rd Model button is only used to compare water depths and elevations in ViewPlan. The viewing option of Water Depths/Areal Extents allows the user to overlay the areal extents and depths (as a function of duration and depths) for up to three scenarios. If using this option, the base model should have the largest extents with the second and/or third model having the smallest extents. A typical example would be to display the areal extents of a 100 year flood (the Base model), a 50 year flood (Compare Model) and a 10 year flood (3rd WD model).

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Figure 1
Figure 1

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Figure 1 Load a comparison EFDC model .
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Figure 2
Figure 2

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Figure 2 ViewPlan: Model Compare for WS Elevation.


When a user has a comparison model loaded it is also possible to view the time series extraction comparison between models. After selecting Alt-M in ViewPlan to compare the model results as shown in Figure 2, extract the time series Base – Compare models as shown in Figure 3.

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Figure 3
Figure 3

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Figure 3 Time Series Extraction: Model Compare for WS Elevation.