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The HabitatRiver demonstration model provides a typical example of a large gravel bed river, with multiple vegetated islands, bars, and side channels. The upstream boundary of the model uses a stepped flow pattern fitting with the IFIM methodology, where flow is gradually increased from low to high flow conditions over a period of three hoursseven days. The downstream boundary condition utilizes a rating curve to define the relationship between the water level and flow in the channel. The model simulates the basic 3D hydrodynamics of the river system at various flow and stage combinations.
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Begin entering XY data from the spreadsheet provided to define the habitat suitability curve for Water Depth for the Muskellunge Adult. Once finished, the curve should appear as shown below in Figure 5.
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You can now specify a layer of the model to focus on for a particular habitat suitability curve. Layer 0 (depth averaged) is entered by default in the Layer field of the selected parameter, but any model layer can be used in this field to refine the analysis.
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Figure 6. The Habitat Suitability Criteria dialog, with Suitability Curves defined for 2 two parameters (Water Depth and Velocity).
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Note that the number of cells included in the analysis can be refined using the Sub-Set option in the Habitat Suitability Criteria dialog. This dialog can utilize a .p2d or other shapefile to define a region of the model for analysis.
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Once model results have been extracted for the desired number of cells, Secondary Processing of Extracted Results options become available to the user in the Habitat Suitability Criteria dialog. From the drop-down menu, select WUA Time Series, and press View WUA Time Series to generate a plot of this data (Figure 8). The data displayed in this plot is automatically extracted to a data file under the #habitat folder in the model directory.
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Close the Time Series Data Grapher to return to the Habitat Suitability Criteria dialog. Select WUA versus Q from the Type of Processing drop down menu. This will bring up a text box which is used to enter time and discharge data to plot the weighted usable area as a function of discharge (Figure 9). Click the text box and press Enter to open the XY Data Editing Tool to enter time and discharge data.
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Press OK to return to the Habitat Suitability Criteria dialog once the Time time and Discharge discharge data has been entered, then press the View WUA versus Q button to show the data (Figure 11).
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