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You must specify all possible functional units present in the area of interest, or that you want to represent in the scenario. There are three ways of defining FUs: manually, from a text file, or from a shape file (Figure 5). This is synonymous to the menu item Edit » Functional Units » List.
Figure 5. Manually adding functional units
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| Note: In the shapefile, there should be no empty records in the column which is chosen to describe the FU classes. |
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You must assign areas to every functional unit in each sub-catchment. The functional units that appear depend on those you defined previously. You can assign areas manually (using either the Table or Map tabs), or from a raster such as a land use map. . This is synonymous to the menu item Edit » Functional Units » Assign Area....
To assign FU areas manually using the Table tab:
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