SWMM56

This blog contrasts the St Venant Solutions for InfoSewerH20Map Sewer (1), InfoSWMM/H2OMap SWMM and ICM/ICM SE. 1.  Assumptions for the St. Venant Equations The assumptions behind Lumped and Distributed Models along with the assumptions of the  St Venant equations .  InfoSewerH20Map Sewer, InfoSWMM, H2OMap SWMM, SWMM5, ICM and ICM SE are all Distributed models for Unsteady flow.  InfoSWMM and InfoSewerH20Map Sewer have options for direct steady flow.  ICM and InfoSWMM can also use a quasi steady flow solution.   All of these Innovyze models use the Continuity Equation and Momentum equation for routing flows in links.  The numerical solution differs between the three Innovyze main  platforms: InfoSewer and H2OMap Sewer InfoSWMM,  H2OMap SWMM and SWMM 5 ICM and ICM SE Continuity Equation Various Forms of the Momentum Equation 2.  Muskingum-Cunge for InfoSewerH20Map Sewer The continuity (mass conservation) equation is: where x ...

InfoSewer - Minimum Travel Distance Note:    The minimum travel distance in an  InfoSewer  or H2OMap Sewer model can be related to the mean link length in the Pipe DB Table.  Here is a table of the Mass balance check for one network versus the minimum travel distance in feet for the default values of network accuracy, minimum time length and maximum number of segments at a report time step of 1 hour.   As you can see making the Minimum Travel equal to the mode of the length histogram yields the best results even for the default model parameters.   Minimum Travel Distance Mass Balance Check: Label 1 10.50 (%) 5 3.25 (%) 10 6.25 (%) 20 17.34 (%) 25 7.05 (%) 30 1.38 (%) 40 1.07 (%) 50 1.07 (%) 55 1.05 (%) 58 3.87 (%) 60 3.34 (%) 75 0.55 (%) 80 3.09 (%) 90 11.60 (%) 100 17.20 (%) 200 17.34 (%) 1000 17.34 (%) Tags   A Basic InfoSewer Wet Well/ Pump and Force Main System   InfoSewer - Minimum Travel Distance

Innovyze has a broad range of programs which you can see on www.innovyze.com but each of our programs has many ways to import and export model data between programs.  All of our products have CSV and shapefile import and export.  One way to use a SWMM 5 model in H2OMap Sewer or InfoSewer is to import CSV files from H2OMap SWMM or CSV file constructed using SWMM 5.  In H2OMap Sewer you can import: 1. Manhole 2. Pipe 3. Outfall 4. Pump 5. Wet Wells 6. The DWF values can  copied to the Other Loading DB Table 7. DWF Patterns can be copied and pasted into the Pattern Tables in H2OMap Sewer and InfoSewer H20Map Sewer GUI and Import Manager

See the image for the two main reasons but another reason is that you get a better continuity error with this new(er) feature or option in InfoSewer A Simple Advanced Model in InfoSewer

Note:    The minimum travel distance in an InfoSewer or H2OMap Sewer model can be related to the mean link length in the Pipe DB Table.  Here is a table of the Mass balance check for one network versus the minimum travel distance in feet for the default values of network accuracy, minimum time length and maximum number of segments at a report time step of 1 hour.   As you can see making the Minimum Travel equal to the mode of the length histogram yields the best results even for the default model parameters. Minimum Travel Distance Mass Balance Check: Label 1 10.50 (%) 5 3.25 (%) 10 6.25 (%) 20 17.34 (%) 25 7.05 (%) 30 1.38 (%) 40 1.07 (%) 50 1.07 (%) 55 1.05 (%) 58 3.87 (%) 60 3.34 (%) 75 0.55 (%) 80 3.09 (%) 90 11.60 (%) 100 17.20 (%) 200 17.34 (%) 1000 17.34 (%)

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