You are currently reviewing an older revision of this page.
What are the different velocity methods used in SewerCAD and StormCAD?
SewerCAD and StormCAD come with four different ways of computing the average velocity in a conduit.
1) Uniform flow velocity - This is obtained by calculating the velocity in the pipe at normal depth. If the normal depth corresponds to a surcharged condition, the full flow velocity is used instead.
2) Full flow velocity - This corresponds to the velocity when the pipe is flowing full. The flow area is equal to the entire cross-sectional area of the pipe.
3) Simple Average Velocity - This is simply the average of the velocity at the upstream and downstream end of a conduit. This does not account for any depth changes between the two ends of the pipe as the weighted average velocity method does.
4) Weighted average velocity - This method take the simple average velocity of each profile segment is considered and given a weight based on its length.