05. Manning Equation Comparison

The Manning Equation can be applied using three methods, but which method should be used? Laboratory results have shown that these methods provide similar results under uniform flow conditions. However, only the Stevens-Schutzbach Method describes the relationship between depth and velocity under non-uniform flow conditions caused by a dead dog.

This example illustrates this concept and demonstrates the effect of a dead dog on sewer capacity. The predicted full-pipe velocities range from 1 ft/s to 3 ft/s a three-fold difference amoung these methods.