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Showing posts from December, 2014

What does Percent Not Converging Mean in SWMM5?

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In SWMM 5 there is a Routing time step summary which tells the modeler the minimum time step during the simulation based on the CFL condition, the average time step, maximum time step, the percent of time spent in steady state, the average iterations per step and the percent not converging.  The percent not converging means the percent of the time the link flows and node depths did not converge within the maximum number of trials per time step (Figure 1).
  *************************   Routing Time Step Summary   *************************   Minimum Time Step           :     0.52 sec     Average Time Step           :     8.76 sec   Maximum Time Step           :    10.00 sec   Percent in Steady State     :     0.00   Average Iterations per Step :     2.14   Percent Not Converging      :     1.69
The Percent Non Converging is the percent of time at least ONE link did not converge within the maximum number of trials per time step.  The Percent Non Converging is the Total Number of Non Convergent Ste…

How to Make a Trapezoidal Inflow Time Series in InfoSWMM

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You can make a Trapezoidal shaped Time Series in InfoSWMM by using the following steps: .Use the Inflow Icon at a Node in the Attribute Browser.Use either an Inflow Time series with date/time/value or.A baseline flow value with a pattern.The time series comprise a Date that matches your simulation time period.A hour:minute:second Time value in the Time Series Table.A flow unit with the units used in the General Tab of Run Manager.This time series is entered in the Attribute Browser under Time Series in the Operation Tab


The EPA SWMM 5 code and the various versions of Visual Studio

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The EPA SWMM 5 code and the various versions of Visual Studio. If you have multiple versions of Visual Studio on your computer you might have toolset issues.  Visual Studio 2010 and 2012 are for Windows 7, Visual Studio 2013 is for Windows 8


Visual Studio 2012 uses the v11 toolset
Visual Studio 2013 uses the v12 toolset

InfoSWMM Story 1 on Storirfy

How to Make Scatter Graphs in InfoSWMM and H2OMap SWMM

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How to Make Scatter Graphs in InfoSWMM and H2OMap SWMM


Scatter graphs of velocity on the X axis and depth on the Y axis are important to help understand the reason for flow/depth relationships in flow surveys.  You can make a scatter graph in InfoSWMM by plotting the link flow and the by clicking on the Report button.  A right mouse click will bring up the Data Scatter Plot option. The column on the left of the selected columns will be the X Axis column of data. The column on the right will be the Y Axis column of data.  The default is depth followed by velocity. The order variables can be changed by using the Format Icon (bullet 1) followed by the Scatter Plot selection of velocity/depth (see Figure 1 for an example).  Figure 2 shows how to make a Log/Log Scatter Graph in InfoSWMM using the Properties Icon.