Category: Inside SWMM5

The Link Time Step in SWMM 5, InfoSWMM and H2OMap SWMM

Posted on By Storm/Sewer Modeler with a 45 yr association with EPASWMM. Now at Autodesk supporting InfoWorks ICM_SWMM Founder http://robertdickinson.org, Chair/TAC at http://CIMM.ORG No Comments on The Link Time Step in SWMM 5, InfoSWMM and H2OMap SWMM
Introduction:ย  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM using a QA/QC version of SWMM 5 with extended graphics. ย ย I always hope that seeing the inner workings
… Read the rest
H2OMapSWMM (retired), InfoSWMM, Inside SWMM5, SWMM5, Venant

The Non Linear Term in the Saint Venant Equation of SWMM 5

Posted on By Storm/Sewer Modeler with a 45 yr association with EPASWMM. Now at Autodesk supporting InfoWorks ICM_SWMM Founder http://robertdickinson.org, Chair/TAC at http://CIMM.ORG No Comments on The Non Linear Term in the Saint Venant Equation of SWMM 5

Subject:ย Nonย Linearย Termย in theย Saintย Venantย Equationย ofย SWMMย 5

The flowย equationย has six components that have to be in balance at each time step:

1. Theย unsteady flowย termย or dQ/dt

2. Theย frictionย lossย termย (normally based onย Manning'sย equationย except for full force mains),… Read the rest

#INFOSWMM, Force Mains, H2OMapSWMM (retired), InfoSWMM, Inside SWMM5, SWMM5, Venant

Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5

Posted on By Storm/Sewer Modeler with a 45 yr association with EPASWMM. Now at Autodesk supporting InfoWorks ICM_SWMM Founder http://robertdickinson.org, Chair/TAC at http://CIMM.ORG No Comments on Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5
Subject:  Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5
You can often get a hysteresis effect for the Flow versus Depth relationship in SWMM 5 due to the five component St. Venant equation used
… Read the rest
#INFOSWMM, InfoSWMM, Inside SWMM5, SWMM5, Venant

Time Step Selection in InfoSWMM, ICM SWMM Networks and SWMM5

Posted on By Storm/Sewer Modeler with a 45 yr association with EPASWMM. Now at Autodesk supporting InfoWorks ICM_SWMM Founder http://robertdickinson.org, Chair/TAC at http://CIMM.ORG No Comments on Time Step Selection in InfoSWMM, ICM SWMM Networks and SWMM5

1st 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 … Read the rest

#INFOSWMM, ICM, InfoSWMM, Inside SWMM5, SWMM 5.1.010, SWMM 5.1.011, SWMM 5.1.012, SWMM 5.1.013, SWMM 5.1.014, SWMM5
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