Adding Impact Areas - Not Needed (related to FIA)

An impact area is any distinct portion of a study that is affected by rising or falling stage in a stream, river, lake, or reservoir. Impact areas are an optional element, and are only required when the user wants to compute impacts at damage area centers in the study area.

To import impact areas from a shapefile:

From the Maps menu, point to Import, click Impact Areas. The Import Impact Areas dialog box will open. The Shapefile Name list figures out whether there are any polygon shapefiles available in the maps directory; from the list the shapefile that represents the impact areas for the RussianRiver study - RR_ImpactAreas.shp.
From the Database Field Name list the user needs to select the field name in the attribute file that contains the names of the impact areas - ID_Name. Once a field name is selected, the table below will populate with the impact areas contained in the shapefile. If there is an issue with any of the impact areas the checkbox in the Import column will not be selected.
Click Import, the Import Impact Areas dialog box will close. Once the import of the impact areas is completed, a message window will appear letting the user know that the impact areas have been imported successfully. In the active Map Window the impact areas appear as green polygons.

A user can also add impact areas to the schematic manually by performing the following steps:

From the Schematic Map Window, find the location where an impact area needs to be added, press the Impact Area Tool .
Hold down the CTRL key while clicking the mouse button. Each click creates a vertex point, which is the boundary of the polygon. When reaching the end point, release the CTRL key and click.
The Name New Impact Area dialog box will open. Enter a name (Guerneville), and if needed, enter a description. Click OK, the Name New Impact Area dialog box will close.
The impact area will now appear in the display area as a green polygon with a name.