The InfoSWMM Risk Assessment Manager is laid out according to the duties required for risk assessment. Four options are found in the drop-down menu of the risk assessment. Each of these instructions launches a new dialog box where users can submit further information. The following … Read the rest
From the GIS Gateway, the Build Shapefile tool lets you create a new ESRI® Shapefile from InfoSWMM data. Every attribute can be loaded into the new Shapefile attribute table by using the data associated with each attribute type. The application of the tool can be … Read the rest
The Junction Dry Weather Flow (DWF) data table stores information regarding the dry weather load (e.g., sanitary loads) entering the collection system at the junction node. Refer to the section on the inflow editor for more information on these input data. The following table shows … Read the rest
Note: The variable time step option is a powerful feature of SWMM5 as it lets the engine determine the CFL time step needed for each time step (1). A good guide is to use a maximum time step 2 to 5 times bigger than the average time step during a … Read the rest
Conservative finite-volume forms of the Saint-Venant equations for hydrology and urban drainage Ben R. Hodges National Center for Infrastructure Modeling and Management, University of Texas at Austin, Austin, Texas, USA Received: 02 … Read the rest
The SWMM5 engine uses mean flow as the dry weather flow value (DWF) and not population but does allow weekday, weekend, daily and monthly patterns. You can use these many pattern options to actually use population in the SWMM5 and InfoSWMM dry weather flow tables. Here are the steps as … Read the rest
Normally in flow routing, when the flow into a junction exceeds the capacity of the system to transport it further downstream, the excess volume overflows the system and is lost. An option exists to have instead the excess volume be stored atop the junction, in a ponded … Read the rest
Unit Hydrographs (UHs) estimate rainfall-dependent inflow/infiltration (RDII) into a sewer system. A UH set contains up to three such hydrographs, one for a short-term response, one for an intermediate-term response, and one for a long-term response. A UH group can have up to 12 UH sets, … Read the rest
The EPA Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas. The runoff component of SWMM operates on a collection of subcatchment areas that receive precipitation and generate … Read the rest
SWMM 5 has the ability to launch external applications from its graphical user interface that can extend its capabilities. This section describes how such tools can be registered and share data with SWMM 5.
Refactoring the SWMM 5 Help File - Routing in SWMM5
Flow routing within a conduit link in SWMM is governed by the conservation of mass and momentum equations for gradually varied, unsteady flow (i.e., the Saint Venant flow equations). The SWMM user has a choice on the level of sophistication … Read the rest
This section describes the different ways in which the results of a simulation can be viewed. These include a status report, a summary report, various map views, graphs, tables, and a statistical frequency report.
Rain Gages supply precipitation data for one or more subcatchment areas … Read the rest
My Contact Information
You can send me an email to email@example.com or firstname.lastname@example.org or email@example.com and I will do my best to answer your questions. Autodesk Inc bought Innovyze Inc on 4/2021 so I have multiple work emails now.
I have noticed based on email questions and postings to the SWMM LIst Sever (a great resource hosted by CHI, Inc.) that many SWMM 5 users do not know about the really outstanding documentation on SWMM 5 posted on the EPA Website https://www.epa.gov/water-research/storm-water-management-model-swmm It consists of two now and in the near future three volumes on Hydrology, Water Quality, LID’s and SuDs and Hydraulics. The documentation is fantastically complete with detailed background on the theory, process parameters and completely worked out examples for all of the processes in SWMM5. It is truly an outstanding aid to modelers and modellers worldwide. It would benefit you to read them (if you have not already downloaded the PDF files). Thanks for reading this post