Applies To
	Product(s):	StormCAD, SewerCAD
	Version(s):	CONNECT Edition, V8i
	Area:	Output and Reporting
	Subarea:	N\A

Problem

Profile shows HGL (Hydraulic grade line) below the ground elevation between two structures.

Solution

The GVF (gradually varied flow) solvers split up a pipe into a number of segments when solving for a model. This allows the program to accurate reflect changes in hydraulic grade within the pipe, such as hydraulic jumps. However, when a pipe in a model is long, they need be divided into additional sections for calculation purposes so that output is more accurate. In this case, you can try changing the property field "Number of Flow Profile Steps" in the calculation options.

Steps to do change profile options :

1. Go to Calculation Options (View > Calculation Options) and open the active calculation option in the Properties grid.
2. Go to Gravity Hydraulics section of the properties and change the number of flow profile from default profile step of 5 to 6 and keep trying to raise the number until you are satisfied the way it looks.

You may also want to consider upgrading to the latest version of StormCAD or SewerCAD, if you are not already. This way you can be assured to have the latest updates to the software.

See Also

Hydraulic grade line is below the invert of a conduit or channel