Link Shape Geom1 Geom2 Geom3 Geom4 Barrels Culvert Name From Node To Node Pump Curve Status Sartup Shutoff Name From Node To Node Length Roughness InOffset OutOffset InitFlow MaxFlow Name Elevation Type Stage Data Gated Route To Name Elevation MaxDepth InitDepth SurDepth Aponded You can also run this example using Hazen-Williams Force Mains, but you have to set the C-factor to a very small value (like 12) to get similar results. To keep things simple, I used regular Circular conduits and not Force Main conduits, with a very large Mannings n to exaggerate the head losses. The SWMM solution for this example has been verified in EPANET as well. If you copy and paste the lines below into a SWMM input file and run it you will see that that the pump is operating at this point and that all of the head losses across the segments balance out.
There is a Type 3 pump placed after the first segment whose lift is about 77 m at flow of 30 cfs.
Below is a small example of a pressurized main with three 425 m long segments of 300 mm pipe asked to convey 30 lps from an elevation of 0 m up to 40 m.
SWMM uses the hydraulic head, not the elevation head (i.e., water surface elevation) to compute the operating point for a Type 3 pump.
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