You can create a flow path for a catchment that is based on a polyline.
The uphill end of the polyline is considered to be the hydraulically most distant point and the downhill end is considered to be the discharge point. The elevations defined in the polyline are used to define the flow path slope. If the polyline has no elevation data, you can edit the slope of the flow path from the Catchment Properties dialog box.
A catchment can have only one flow path. If a flow path already exists for the catchment, this command edits the flow path based on the polyline that you select. Any existing flow segment data that exists for the current flow path will be overwritten.
- If you have not done so already, create a catchment from a surface or from an object.
- Click
Analyze tab
Ground Data panel
Flow Paths drop-down Create Flow Path From Object Find.
- Select the catchment.
- Select the polyline near the uphill end.