Place Catchment

Used to create a catchment.

Ribbon

Layout > Layout > Place Catchment

Workflow

Method - choose the method to describe the boundary of the area:

Pick Points lets you pick a series of points (by clicking in the graphics, Civil AccuDraw, or snapped to other graphics)
Pick shape lets you select a graphic
Flood Fill lets you pick intersecting graphics

Select Outflow - pick the node that the catchment outflows to, or Reset if this element has not been created.

Select reference surface - pick a terrain model if you want a graphic to be created in the 3D model (by draping the catchment boundary over the terrain model) or Reset if you do not want this.

Use Scaled Area - if checked, the enclosed area of the boundary will be used. If unchecked, you can type in the area to use in the Area field.

Feature Definition - Defines the feature definition to be assigned to the new catchment.

Manipulators

Use Element Selection to select the catchment and see its edit manipulators:

Vertex manipulators can be used to move the vertices of the catchment polygon.
The Outflow manipulator can be used to assign or change the outflow for the catchment.

Properties

Select the catchment and click Properties to access the graphical and spatial properties of the catchment. Select the catchment and click Utility Properties to access the hydraulic properties of the catchment.

Note: When a catchment area has its "Area Defined By" Drainage property set to "Land Cover Areas", and it is at least partly within a Land Use Polygon, then a weighted runoff coefficient will be calculated.