19. Pump Station When operating in backwater conditions caused by a pump station wet well, flow monitoring data follow and iso-Q equal to the pumping capacity. This monitor is located upstream from a pump station that alternates between two lead pumps, each with a rated capacity of 9 MGD. The […]
Scattergraph
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18. CSO Side Weir This scattergraph displays data from a flow monitor installed in a 120-in sewer located just upstream from a CSO regulator. Dry weather flows are funneled into a 54-in sewer and continue to the WWTP. However, once the flow depth exceeds 28 inches, additional flow is carried […]
17. CSO End Weir Flow monitoring data provide a means to determine the duration and volume of a combined sewer overflow (CSO). This scattergraph displays data from a flow monitor installed in a 30-in sewer located just upstream from a CSO structure. This structure is equipped with an end weir […]
16. Reverse Flow Reverse flow in a sewer system is rare, but in this situation a 12-in sewer is overpowered by a much larger downstream interceptor. During a rain event, this sewer experiences backwater and surcharge conditions. However, note the sequence of events that occurs during surcharge conditions. The flow […]
15. SSO Overflow Pipe This 10-in sewer is equipped with an 8-in overflow pipe located in the downstream manhole. During a rain event, this sewer experiences backwater and surcharged conditions that limit flow to about 37% of the estimated full-pipe capacity. The SSO is activated once the flow depth reaches […]
14. SSO Downstream The scattergraph depicted here reveals backwater and surcharge conditions that result in a sanitary sewer overflow (SSO) downstream from this monitoring location.