Scattergraph

This scattergraph is a hydraulic mother lode showing three distinct hydraulic events.

These data are from a flow monitor installed on one of three interceptors arriving at a wastewater treatment plant (WWTP).

Reverse flow in a sewer system is rare, but in this situation a 12-in sewer is overpowered by a much larger downstream interceptor.

When operating in backwater conditions caused by a pump station wet well, flow monitoring data follow and iso-Q equal to the pumping capacity.

The Manning Equation can be applied using three methods, but which method should be used?

The Manning Equation is an empirical formula that describes a relationship between depth and velocity under ideal conditions and is commonly used to design sewer systems.