Méthodologie
Établit une ligne piézométrique séquentielle à partir des tronçons déclarés de conduite, pompe, perte fixe et niveau d’eau, avec Darcy–Weisbach et les pertes singulières saisies. Il s’agit d’un criblage HGL; les variations de charge de vitesse sont omises et EGL/TDH ne sont pas calculés.
Pipe velocity = Q/A; Reynolds number = vD/ν. Darcy factor uses f = 64/Re for laminar flow and Swamee–Jain for turbulent flow.
Major pipe loss uses Darcy–Weisbach; minor loss is ΣK·v²/(2g).
The sequential profile adds entered pump head and subtracts major, minor, and fixed equipment losses. A basin water surface is an explicit downstream HGL boundary.
Elevation is reported separately; pressure head where elevation is entered is downstream HGL minus elevation.
A segment minimum HGL criterion is evaluated once at its downstream station. The optional starting minimum HGL criterion is evaluated at the starting station.
For 2,000 < Re < 4,000, Swamee–Jain is used as a screening approximation and a transitional-flow warning is reported.