Composite Hydrographs

A composite hydrograph graphs the total flow over time from multiple defined fixed/unit loads, hydrographs, and pattern loads.

You can access the composite hydrograph and its corresponding data table from the Inflow Collection dialog boxand the Sanitary (Dry Weather) Flow Collection Editor dialog box, both of which are available from the Property Editor for selected elements. For example, a manhole has properties for Inflow Collection and Sanitary Loading.

This graph is dynamic and is generated automatically each time it is requested.

The time step in a composite hydrograph is determined by going from time 0 to the Duration divided by Calculation Time Step. You can define the Duration and Calculation Time Step values in the Calculation Options Manager.

Note: If the times in the input hydrograph (inflow) do not cover the all-calculation duration, i.e, the start time is larger than 0 and/or the end time is less than the duration, the dynamic solvers (implicit and explicit) will use a 0.0 inflow for those times that are not covered by the input hydrograph.