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 …
How to Use Population for DWF in SWMM5 and InfoSWMM
Treatment in BMP’s and LID’s for SWMM5
Treatment in BMP’s and LID’s
5.1 Treatment
Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here
5.1.1 Background
Management of …
Surface Ponding in SWMM5
Surface Ponding
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 …
Refactoring the SWMM 5 Help File – RDII in SWMM5
RDII in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – SWMM5 Introduction
| 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. …
Refactoring the SWMM 5 Help File – Snowmelt in SWMM5
Snowmelt in SWMM5
| 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 |
Refactoring the SWMM 5 Help File – Tools in SWMM5
Tools in SWMM5
| 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 …
Refactoring the SWMM 5 Help File -Editing in SWMM5
Editing in SWMM5
| 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, …
Refactoring the SWMM 5 Help File – Routing in SWMM5
Routing in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – Output in SWMM5
Output in SWMM5
| 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, …
Refactoring the SWMM 5 Help File – Climate Data in SWMM5
Climate Data in SWMM5
| 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 |
Refactoring the SWMM 5 Help File – Groundwater in SWMM5
Groundwater in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – Non Visual Objects in SWMM5
Non-Visual Objects in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – Links in SWMM5
Links in SWMM5
| 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…
Refactoring the SWMM 5 Help File – Nodes in SWMM5
Nodes in SWMM5
| 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 |
Refactoring the SWMM 5 Help File – Water Quality in SWMM5
Water Quality in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – Toolbars and Menus in SWMM5
Toolbars and Menus in SWMM5
| 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:
| · |
Refactoring the SWMM 5 Help File – Hydrology in SWMM5
Hydrology in SWMM5
| 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 |
Refactoring the SWMM 5 Help File – Files in SWMM5
Files in SWMM5
| 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 |
Refactoring the SWMM 5 Help File – LID’s In SWMM5
LID’s in SWMM5
| 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 …
Refactoring the SWMM 5 Help File – Projects in SWMM5
Projects in SWMM5
| 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. …
Refactoring the SWMM Help File – Printing in SWMM5
Printing in SWMM5
| 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 …
Refactoring the SWMM Help File – RTC or Control Rules in SWMM5
Controls in SWMM5
| 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 …
Refactoring the SWMM Help File – Error and Warning Messages in SWMM5
Error and Warning Messages in SWMM5
| 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 …
Markdown – Storm Water Management Model User’s Manual Version 5
– –
United StatesEnvironmental Protection
Agency
EPA/600/R - 14/4 13b
Revised September 2015
www2.epa.gov/ water-researchStorm Water Management Model
User’s Manual Version 5.
Office of Research and Development
Water Supply and Water