From Ben's twitter account

If you're into the Saint-Venant equations, there's a new derivation in town.

https://doi.org/10.5194/hess-23-1281-2019 …

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

New Features in Innovyze SWMM 14.7

New Engine and GUI Features in InfoSWMM 14.7 which is based on EPA SWMM 5.1.013

More about EPA SWMM 5.1.013 https://swmm5.org/2018/08/15/swmm-5-1-update-history-up-to-swmm-5-1-013/

How to Easily Use the DWF Allocator with your Lots Shapefile in InfoSWMM

The goal of this document is to show how you can use a shapefile with polygon loadings to a link in the InfoSWMM DWF Allocator to create DWF loadings to the nodes in InfoSWMM that are the … 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

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 stormwater quality is usually performed through a combination of so-called “best management practices” (BMPs) and a form … Read the rest

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 option exists to have instead the excess volume be stored atop the junction, in a ponded … Read the rest

Surface Runoff in InfoSWMM

InfoSWMM offers 12 choices for modeling surface runoff (click on link to see more information on each method):

• Nonlinear Reservoir
• The Colorado Urban Hydrograph Procedure (CUHP)
• NRCS (SCS) Dimensionless Unit Hydrograph Method
• NRCS (SCS) Triangular Unit Hydrograph Method
• Delmarva Unit Hydrograph
• Snyder Unit Hydrograph Method
• Clark

Study Area Map in SWMM5

SWMM's Main Window

SWMM's main window is pictured below. Click on a labeled element to learn more about it.

Map Toolbar

The Map Toolbar contains buttons for viewing the Study Area Map.

	Selects an object on the Map
	Selects link or subcatchment vertex points

This file documents changes made to swmm44gu by Wayne Huber or others

.

WCH = Wayne Huber

RED = Robert Dickinson

CIM = Chuck Moore

MCH = Mitch Heineman

LR = Lew Rossman

1. 10/11/99, C. Moore. Yroute: Correct C. Moore correction at line 118

to make akon = -1.0000001

The … Read the rest

RDII in SWMM5

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

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. The runoff component of SWMM operates on a collection of subcatchment areas that receive precipitation and generate … Read the rest

Snowmelt in SWMM5

Snowmelt parameters are climatic variables that apply across the entire study area when simulating snowfall and snowmelt. They include:

See … Read the rest

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 registered and share data with SWMM 5.

Tools Menu

The Tools Menu contains commands used to configure … Read the rest

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, and repositioned.

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

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, graphs, tables, and a statistical frequency report.

Viewing a status report

Viewing a summary report

Variables that … Read the rest

Climate Data in SWMM5

Climatology

The Climatology object in EPA SWMM describes the following climate-related variables used for computing runoff and snowmelt:

Rain Gages

Rain Gages supply precipitation data for one or more subcatchment areas … Read the rest

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 the drainage system, or exfiltration of surface water from the drainage system, depending on the hydraulic gradient … Read the rest

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 within a study area.

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

Conduits are pipes or channels that move water from one node to another in the conveyance system. Their … Read the rest

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:

Nodes are also the points where external inflows can enter a drainage system … Read the rest

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 following processes can be modeled for any number of user-defined water quality constituents:

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:

Hydrology in SWMM5

Hydrologic Modeling Features

SWMM accounts for various hydrologic processes that produce runoff from urban areas. These include:

Files in SWMM5

Files Used by SWMM

This section describes the various files that SWMM can utilize. They include:

The only file required to run … Read the rest