Curve Editor

Curve objects are used to describe a functional relationship between two parameters. The following types of curves are available in GeoSWMM:

Storage curve describes how the surface area of a Storage Unit node varies with water depth.
Shape curve describes how the width of a cross-sectional shape varies with the height for a Conduit link.
Diversion curve relates diverted outflow to total inflow for a Flow Divider node.
Tidal curve describes how the stage at an Outfall node changes by hour of the day.
Pump curve relates flow through a Pump link to the depth or volume at the upstream node or to the head delivered by the pump (Fig.124).
Rating curve relates flow through an Outlet link to the freeboard depth or head difference across the outlet.
Control curve determines how the control setting of a pump or flow regulator varies as a function of some control variable as specified in a Modulated Control rule.

Fig.124: Pump Curve Editor window

GeoSWMM enables the user to utilize different formats of data, such as text, CSV, PRN, etc., for import and use in the curve editor.