SWMM56

Subject:   The  Pump   flow  is based on the lookup table you enter for the  pump  (Figure  1 ).  At each iteration during each time step of the solution  SWMM   5  will look up the  flow  for the pump  based on the current control variable across the  pump .  The control variable for the  pump  can be  one  of four variables: 1 .     The volume of the upstream wet well, 2.     The depth of water at the upstream node or inlet node  without  interpolation between data points, 3.     The downstream water surface elevation across the  pump  minus the upstream water surface elevation, and 4.     The depth of water at the upstream node or inlet node  with  interpolation between data points. The  pump  summary table in the rpt file will tell you how often the  pump  was used, the maximu...

Subject: The Pump flow is based on the lookup table you enter for the pump (Figure 1). At each iteration during each time step of the solution SWMM 5 will look up the flow for the pump based on the current control variable across the pump. The control variable for the pump can be one of four variables: 1. The volume of the upstream wet well, 2. The depth of water at the upstream node or inlet node without interpolation between data points, 3. The downstream water surface elevation across the pump minus the upstream water surface elevation, and 4. The depth of water at the upstream node or inlet node with interpolation between data points. The pump summary table in the rpt file will tell you how often the pump was used, the maximum flow, the average flow, the total volume of the pump, the power usage and the percent of the time off the entered pump curve. You can also plot the pump flow versus the inlet depth to see how often the pump was off the pump curve (Figure 2)...