Powerful Tools Representing Depth and Velocity Sewer Flow DataThe scattergraph is a powerful tool that displays depth and velocity data from a sewer flow monitor. The resulting patterns form characteristic…
Day: November 12, 2018
Drifting Velocity Sensor
29. Drifting Velocity SensorThis scattergraph displays data from a flow monitor with a drifting velocity sensor. Note that the reported flow velocity drifts over a wide range without a corresponding…
Drifting Depth Sensor
28. Drifting Depth SensorMost flow monitoring data can be described by the Manning Equation using either the Design Method, the Lanfear-Coll Method, or the Stevens-Schutzbach Method. Data that do not…
Undular Jump
27. Undular JumpA hydraulic jump or other transcritical flow condition may reduce the accuracy of a flow monitor. However, this effect is not strictly limited to critical flow (Fr =…
Hydraulic Jump
26. Hydraulic JumpThis scattergraph is from a site that experiences a hydraulic jump. This condition occurs when flow transitions from supercritical to subcritical flow. In this example, the hydraulic jump…
Iso-Froude Lines
25. Iso-Froude LinesThe Froude Number (Fr) is a dimensionless number used to describe flow conditions and is analogous to the Mach Number defining supersonic flight. If the Froude Number is…