Control Curve Data Fields (SWMM)

A control curve in a SWMM network is used to define how the control setting of a pump or flow regulator, such as an orifice or outlet, varies as a function of a control variable, such as water level at a particular node, as specified in a SWMM Control Rule.

Information relating to a control curve can be viewed and edited on the Control Curve Grid Window of the Links Grids or on the Control Curve Property Sheet.

Most data can be edited on the grid, but some fields cannot be displayed in the grid format.

To view and edit all control curve data, use the Property Sheet.

The table below describes all the data which can be used to define a control curve. For details of results fields for links, see the Link Results Data Fields (SWMM) topic.

Control Curve Data

Database Table Name: sw_curve_control

Field Name	Help Text	Database Field	Data Type	Size	Units	Precision	Default	Error Lower Limit	Error Upper Limit	Warning Lower Limit	Warning Upper Limit
Curve ID	A unique name for this control curve, up to 254 letters, numbers and underscore characters. Upper and lower case letters are treated as being the same. This name cannot be used by any other curve in the same SWMM network.	id	Text	254		0
Control array	This field contains a series of records defining the data for this curve. These are entered on the Curve Editor which is displayed by clicking on the button. Database Table Name: sw_curve_control_data Show Columns Database Names Size, Type and Units Defaults and Error Limits Field Name Help Text Database Field Data Type Size Units Precision Default Error Lower Limit Error Upper Limit Warning Lower Limit Warning Upper Limit Variable The value for the control variable. head Double   Y 3           Setting The corresponding setting for this variable. outflow Double   Q 3           See Control Rules (SWMM) for further information about how these control curves are used.	data	Structure