12. Continuous Backwater This scattergraph displays data obtained during dry weather from a flow monitor installed in a 27-in sewer just upstream from a 12-in Parshall flume. By design, the […]
Scattergraph
30 posts
11. Backwater and Surcharge Orifice The scattergraph show here reveals the presence of a dead dog and a downstream restriction that cause backwater and surcharge conditions. However, note that flow […]
10. Backwater and Surcharge Most surcharge conditions result from downstream restrictions that reduce sewer capacity. The flow monitoring data shown here indicate that this sewer operates as expected up to […]
09. Surcharge Surcharge conditions are common in sewer systems, especially during wet weather event. The flow monitoring data shown here indicate that this sewer operates as expected up to its […]
08. Debris Amusement The scattergraph depicted here reveals shifting debris that reduces the pipe capacity at this monitoring location. The iso-Qs depict the average daily minimum and maximum flow rates. […]
07. Iso-Q Lines The relationship between flow depth and velocity is important to understanding the hydraulic conditions in a sewer. The addition of flow rates to a scattergraph deepens the […]