Tidal Curve Data Fields (SWMM)

A tidal curve in a SWMM network is used to define tide elevations at different hours of the day for a tidal type of outfall node.

Information relating to a tidal curve can be viewed and edited on the Tidal Curve Grid Window of the Nodes Grid or on the Tidal 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 tidal curve data, use the Property Sheet.

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

Common Data Fields

Fields that are common to the majority of objects can be found in the Common Fields topic.

Tidal Curve Data

Database Table Name: sw_curve_tidal

Field Name

Help Text

Database Field

Data Type

Size

Units

Precision

Default

Error Lower Limit

Error Upper Limit

Warning Lower Limit

Warning Upper Limit

Tidal curve ID

A unique name for the tidal 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.

Text

254

Tidal array

This field contains a series of records defining the tidal data for this curve. These are entered on a Curve Editor which is displayed by clicking on the button.

Database Table Name: sw_curve_tidal_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
Hour of day	The hour in the day. This can be between 0 and 24, and can also be expressed as a decimal fraction.	hour	Double			3		0	24
Water surface elevation	The corresponding elevation of the water surface for this node at this hour of the day.	elevation	Double		Z	3		-999

data