SWMM56

1 st   The  time   step  you use in  SWMM   5  is controlled from the top by the rainfall interval (Figure 1): 1.     All of your  time   steps  should be less than the rainfall interval, 2.     The hydrology  time   step  should be less than or equal to the smallest raingage rainfall interval in your network, 3.     The hydraulic  time   step  should be less than or equal to the hydrology  time   step  and should be based on the hydraulic needs of the your network.  Short length links, pump and weirs may require a smaller maximum hydraulic  time   step . 2 nd   The report  time   step  controls what you see in the graphics output of  SWMM   5 . If you see a large difference between that you see in the graphics output and the report text file it is because you have a large difference between the report...