Sunday, October 6, 2013

Hazen Williams and Force Mains in SWMM 5

A few tips for using Hazen Williams and Force Mains in SWMM 5.   A key fact is to remember ONLY one flow in the middle of the link is computed in SWMM 5 so you may have to add Break nodes, use a smaller time step and use a flap gate depending on how often your pumps turn on.  If you do not have numerical problems with the time step you should get exactly the same head loss as you do in steady state Hazen Williams calculators when you use InfoSWMM, H2OMap SWMM and SWMM 5.

Figure 1.  Larger Tip Image 
Figure 2.  SWMM 5 compares well to the Hazen Williams Head loss calculators



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Today is day 356 or 97.5 percent of the year 2024

English: Today is day 356 or 97.5 percent of the year 2024 Mandarin Chinese: 今天是2024年的第356天,即97.5% Hindi: आज 2024 का 356वां दिन या 97.5 प्रत...