| Unit Hydrographs |
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 …
| Introducing EPA SWMM5 |
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. …
| Snowmelt |
Snowmelt parameters are climatic variables that apply across the entire study area when simulating snowfall and snowmelt. They include:
| · | the air temperature at which precipitation falls as snow |
| Using Add-In Tools |
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 …
| Working with Objects |
SWMM uses various types of objects to model a drainage area and its conveyance system. This section describes how these objects can be created, selected, edited, deleted, …
| Flow Routing |
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 …
| Viewing Simulation Results |
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, …
| Climatology |
The Climatology object in EPA SWMM describes the following climate-related variables used for computing runoff and snowmelt:
| · | Temperature |
| · | Evaporation |
| · | Wind Speed |
| · | Snowmelt |
| · | Areal |
| Aquifers |
Aquifers are sub-surface groundwater zones used to model the vertical movement of water infiltrating from the subcatchments that lie above them. They also permit the infiltration of groundwater into …
| Non-visual Objects |
In addition to physical objects that can be displayed visually on a map, SWMM utilizes several classes of non-visual data objects to describe additional characteristics and processes …
| Links |
Links are the conveyance components of a drainage system and always lie between a pair of nodes. Types of links include:
| · | Conduits |
| · | Pumps |
| · | Regulators |
| Conduits |
Conduits…
| Nodes |
Nodes are points of a conveyance system that connect conveyance links together. There are several different categories of nodes that can be employed:
| · | Junctions |
| · | Outfalls |
| · | Flow |
| Water Quality Modeling Features |
In addition to modeling the generation and transport of runoff flows, SWMM can also estimate the production of pollutant loads associated with this runoff. The …
| Main Menu |
The Main Menu located across the top of the SWMM main window contains a collection of menus used for working with the program. These include:
| · |
| Hydrologic Modeling Features |
SWMM accounts for various hydrologic processes that produce runoff from urban areas. These include:
| · | time-varying rainfall |
| · | evaporation of standing surface water |
| · | snow accumulation and |
| Files Used by SWMM |
This section describes the various files that SWMM can utilize. They include:
| · | Project File |
| · | Report and Output Files |
| · | Rainfall Files |
| · | Climate File |
| LID Control Editor |
The LID Control Editor is used to define a low impact development control that can be deployed throughout a study area to store, infiltrate, and evaporate Subcatchment …
| Project File |
A SWMM Project File is a plain text file that contains all of the data used to describe a study area and the options used to analyze it. …
| Printing and Copying |
This section describes how to print, copy to the Windows clipboard, or copy to file the contents of the currently active window in the SWMM workspace. This …
| Control Rules |
Control Rules determine how pumps and regulators in the conveyance system will be adjusted over the course of a simulation. The use of control rules is explained in …
| Troubleshooting Results |
When a run ends prematurely, the Run Status dialog will indicate that the run was unsuccessful and direct the user to the Status Report for …
EPA/600/R - 14/4 13b
Revised September 2015
www2.epa.gov/ water-researchOffice of Research and Development
Water Supply and Water 
EPA/600/R-16/093 | July 2016 |…
www.epa.gov/water-research United States Enviromental Protection Agency Storm Water Management Model Reference Manual Volume III – Water Quality Office of Research and Development Water Supply and Water Resources Division
How to Make Break Nodes in #INFOSWMM
and #InfoSWMM SA
You would add a break node to break up long force mains so that the pipe(s) react faster to the pump flows.
An easy test for SWMM5 versions using the Status Report Message for Unrecognized Keywords in past SWMM5 GUI
SWMM 5.1.012 reading SWMM 5.1.013 Inp Files
SWMM 5.1.011 reading SWMM 5.1.013 Inp Files
SWMM …