STORM DRAINAGE SYSTEMS WHITEPAPER
Capacities of Stacks and Horizontal Drains in Storm Drainage Systems
The sizing for storm drainage systems are dependent upon flow capacity equations used to calculate velocities and flow rates in pipe conduits. One of the variables in the equations is the coefficient of roughness. This paper explores how the roughness of different types of material will change the computational results that are dependent upon the roughness coefficient of the pipe.
- The sizing for storm drainage systems has been committed to plumbing codes with mandatory sizing tables for engineering design.
- Although the plumbing codes allow for deviation based on recognized engineering practices and equivalency of effectiveness, the designs of storm drainage systems generally default to the plumbing codes.
- This study considers how the varying roughness of the different types of material will change the computational results that are dependent upon the roughness coefficient of the pipe.