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Simulation – Analysis
User’s Manual » Features » Tool Bar » Simulation » Simulation – Analysis
The tools in the Analysis section in the Simulation toolbar are used do analysis based on the simulation results. Icon Function Surcharge Analysis Manhole Inflow Analysis Flood Mapping…
VO-SWMM Support
User’s Manual » VO-SWMM Support
VO-SWMM has a comprehensive Help System and supporting documentation that will assist both beginners and advanced users. The primary goal in designing this Help System was to empower users with the tools and information so that almost every question can be answered in…
Installing VO-SWMM
User’s Manual » Installing VO-SWMM
Follow the requirements and steps to install VO on your computer. Hardware and Software Requirements Licensing System Installing VO Running VO Uninstalling VO
Simulation
User’s Manual » Features » Tool Bar » Simulation
The Simulation tab includes tools mainly for setting up and running simulations, viewing and analyzing results, and managing database that will be used in the model. Simmulation Tab Icon Command Description Icon Command Description…
C. Installing VO-SWMM
User’s Manual » Installing VO-SWMM » C. Installing VO-SWMM
Before installing VO, make sure that you have closed all other programs and that any virus protection software is disabled. A connection to the cloud server is required for the cloud license system to work. These 2 TCP ports MUST be open for outgoing connections on…
D. Running VO-SWMM
User’s Manual » Installing VO-SWMM » D. Running VO-SWMM
To start VO-SWMM, simply double-click on the VO desktop icon or find the VO item from your Start menu. Once VO-SWMM starts, you will first see the splash screen as below Then, you will see the main window. You may see the main window as below, which is used for…
E. Uninstall VO-SWMM
User’s Manual » Installing VO-SWMM » E. Uninstall VO-SWMM
You may be required to uninstall VO-SWMM in the future. The following procedure should be followed to uninstall VO-SWMM from your system: Launch Control Panel and double-click Add/Remove Programs. Scroll down the list until you find VO. Select item and click OK…
Simulation – Data
User’s Manual » Features » Tool Bar » Simulation » Simulation – Data
In this section, users can define, import or export data that are used to run the simulation based on SWMM5 engine. It includes rain rain data, climatology data, irregular transects, and hydraulic curves like rating curves, storage curves, pump curves etc.. …
Simulation – Output
User’s Manual » Features » Tool Bar » Simulation » Simulation – Output
VOSWMM generates both time-series results and summary results. The Time-Series Results in VOSWMM include following variables: Catchment: Rainfall, Snow Depth, Evaporation, Infiltration, Runoff, Groundwater flow, Groundwater elevation, Soil moisture and Pollutant…
6.4.4 Simulation Results
Reference Guide » 6 Routing Options in Visual OTTHYMO » 6.4 Muskingum – Cunge Channel Routing » 6.4.4 Simulation Results
The channel routing in Visual OTTHYMO was tested using a natural channel, 5200 m long, main channel bed slope is 0.001, Manning’s n is 0.03, floodplain bed slope is 0.001, Manning’s n is 0.05, no lateral flow, the cross-section parameters are shown in the…
8.3 Continuous Simulation
VO-SWMM » 8 Running a Simulation » 8.3 Continuous Simulation
This chapter introduces how to set and run a continuous model.
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 6. Runoff Treatment » System Representation in SWMM: A Comprehensive Overview
Water Quality Treatment in LIDs In line with Example 4, we treat the filter strip and infiltration trench LIDs as subcatchments to account for their combined impact on storm runoff, including pollutant reduction. While there aren’t well-established models for…
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 1. Post-Development Runoff » System Representation in SWMM: A Comprehensive Overview
SWMM is a distributed model designed to intricately analyze runoff generation within diverse landscapes. This involves subdividing study areas into irregular subcatchments to effectively account for spatial variations in topography, drainage patterns, land cover, and…
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 2. Surface Drainage Hydraulics » System Representation in SWMM: A Comprehensive Overview
SWMM functions by representing a conveyance network through a series of interconnected nodes and links. These links control the flow rate between nodes and can include conduits like open channels, pipes, or other elements such as orifices, weirs, and pumps. Nodes…
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 3. Detention Pond Design » System Representation in SWMM: A Comprehensive Overview
Designing SWMM detention ponds involves key elements: storage units, orifices, and weirs. These components are detailed below: 1. Storage Units: Storage units in SWMM are nodes, distinct from Example 2’s junction nodes. They utilize a Storage Curve to describe…
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 4. Low Impact Development » System Representation in SWMM: A Comprehensive Overview
Filter Strips Filter strips are grassy areas where runoff flows in a thin sheet. They’re not great at reducing peak flows but work well at removing solid pollutants during small storms (< 1 year). They’re most effective on gentle slopes (less than 5%) and…
System Representation in SWMM: A Comprehensive Overview
Practical Example of VOSWMM for Students » 5. Runoff Water Quality » System Representation in SWMM: A Comprehensive Overview
VOSWMM uses different tools and methods to model urban runoff water quality. Calibration data is essential for realistic results. Here’s a brief overview of how VOSWMM handles water quality. Pollutants Pollutants, which are user-defined contaminants, accumulate…
Simulation – Batch Edit
User’s Manual » Features » Tool Bar » Simulation » Simulation – Batch Edit
After selecting multiple commands, users can use Batch Edit to edit the parameters of selected commands in a batch. To use Batch Edit tool, first select commands. Then, right-click on the Schematic or Map View to open context menu and select Batch Edit. Users can…
Step 4: Run Simulation
Tutorials » Modeling and Analysis of Manhole Inflow & Infiltration Using Dual-Drainage Method » Step 4: Run Simulation
Navigate to Simulation toolbar and click Run button. In the pop-up Batch Run window, click the Run button to finish the run.
Step 9: Run Simulation
Tutorials » Dual-Drainage Model » Step 9: Run Simulation
In Simulation toolbar, click the Engine Options button. In the pop-up SWMM Engine window, click the Time Step tab. Set Reporting time step as 5 min. Click the Run button in the Simulation toolbar. In the pop-up Batch Run window, click the button to add a…
6.1 Simulation Time Steps
Reference Guide » 6 Routing Options in Visual OTTHYMO » 6.1 Simulation Time Steps
The storm time step is determined by the format of meteorological data. For synthetic storms it is usually five to ten minutes. The hydrograph computational time step, DT, is determined from the watershed characteristics. For example: Convolution with NASHYD requires…
8 Running a Simulation
VO-SWMM » 8 Running a Simulation
This chapters discusses the steps to create and run a simulation after the drainage network has been created and climate data has been added.
8.2 Single-Event Simulation
VO-SWMM » 8 Running a Simulation » 8.2 Single-Event Simulation
To create a single-event simulation, click the Run button located at the Simulation tab to open the Batch Run window, where all simulation runs are shown in a data table with three columns. The first column is a check box to indicate if the simulation run will be…
8.3.1 Setting Simulation Engine
VO-SWMM » 8 Running a Simulation » 8.3 Continuous Simulation » 8.3.1 Setting Simulation Engine
Before creating and running continuous simulations, it may be necessary to change the global parameters. To change these parameters, click the Engine Options button in Simulation tab. The Simulation Engine window will appear. In the Simulation Engine window, the…
9.3 Continuous Simulation Outputs
VO-SWMM » 9 Working with Output » 9.3 Continuous Simulation Outputs
There are two main differences between the output from continuous simulation and single-event simulation. The summary data is for the long-term time-series data including the water balance. Most of the summary data is on average annual basis. One hydrological…
Step 7: Undeveloped Site – Set up Analysis Option and Run Simulation
Tutorials » Post-Development Runoff » Step 7: Undeveloped Site – Set up Analysis Option and Run Simulation
Table 1-3 (SWMM Application Manual, EPA, Sept. 2016) shows the analysis options used to run the model. The Flow Unit was set in Step 2: Create a New VOSWMM Project. The other analysis options in the table above can be set in Run Options and SWMM Options…
Surcharge Analysis
User’s Manual » Features » Tool Bar » Simulation » Simulation – Analysis » Surcharge Analysis
*Please note that the model must have simulation results to use the Surcharge Analysis tool. Click the Surcharge Analysis button. In the pop-up window, in the drop-down list of Run select the run whose simulation results are to be analysis, and type in critical depth…
Step 23: View Simulation Results
Tutorials » Dual-Drainage Model » Step 23: View Simulation Results
Select one object on the map. Navigate to the Simulation tab. Click the Plot Results button. Select Run in the drop-down lists of the Plot Results window and check on/off for the variables to be plotted. The Graph and the Statistics will be displayed accordingly. Click…
Simulation – Run and Options
User’s Manual » Features » Tool Bar » Simulation » Simulation – Run and Options
The tools in the Simulation section in Simulation toolbar are used to perform simulation run, set default parameters and set engine settings. Icon Function Run Default Values Engine Options…
2.11 Viewing Continuous Simulation Outputs
VO-SWMM » 2 Quick Start Tutorial » 2.11 Viewing Continuous Simulation Outputs
The continuous simulation models the water balance in snowpack and active soil zone. All the water balance components are available as time-series data from the outputs. Similar to hydro-graph summary, these water balance components are also summarized to help get the…
9.2 Single-Event Simulation Outputs
VO-SWMM » 9 Working with Output » 9.2 Single-Event Simulation Outputs
This chapter introduces how to view and plot the simulation results of single-event model.
Manhole Inflow Analysis
User’s Manual » Features » Tool Bar » Simulation » Simulation – Analysis » Manhole Inflow Analysis
Click the Manhole Inflow Analysis button to open the tool window. Choose the desired Run in the drop-down list. Click Yes if users want to update the map automatically with the analysis index Submerged after the analysis is done. Please refer below about the meaning of…
Step 10: Developed Site – Run Simulation
Tutorials » Post-Development Runoff » Step 10: Developed Site – Run Simulation
To run the simulation for all design storms, click the Run button in the Simulation toolbar to open the Batch Run window. Click Run in the Batch Run window to run the batch simulation in the “undeveloped” scenario. Three runs will be made, one for each…
Step 13: View Simulation Summary Results
Tutorials » Quick Start Tutorial » Step 13: View Simulation Summary Results
The Hydraulic Result Tables list the summary results of all the objects. Click the Hydraulic Result Tables tab and then click Conduit (3) tab. In the drop-down list of Run in the Hydraulic Result Tables to choose the simulation run. *The number (3) in the Conduit (3)…
Step 14: View Simulation Detail Results
Tutorials » Quick Start Tutorial » Step 14: View Simulation Detail Results
Select objects on the map canvas, for example, the Conduit NHYD 8 and 12. Make sure you choose the simulation run in the drop-down list in the Output section under the Simulation tab. Then, click Plot Results under the Simulation tab. *If no object is selected, the…
2.7 Viewing Single-Event Simulation Outputs
VO-SWMM » 2 Quick Start Tutorial » 2.7 Viewing Single-Event Simulation Outputs
The main output from a single-event simulation is hydrograph. The hydrographs can be displayed in graph, table and summary. Graph To plot hydrographs with rainfall, select the hydrologic objects and then click the Hydrograph button in Simulation tab. The Hydrograph…
11.2 Program Quits During Run Simulation
VO-SWMM » 11 Troubleshooting » 11.2 Program Quits During Run Simulation
The most common cause of the program quitting during a run simulation is due to incorrect input. To isolate the suspect input, try the following: After the program quits, open the Detailed Output file using a text editor. Make note of the command (by NHYD) where the…
Step 24: Run Surcharge Analysis and Flood Plain Analysis
Tutorials » Dual-Drainage Model » Step 24: Run Surcharge Analysis and Flood Plain Analysis
Surcharge Analysis Click the Surcharge Analysis button. In the pop-up window, in the drop-down list of Run select the “RainData”. Click Run. The Surcharge Analysis result will be updated to the nodes and links in the Parameter Tables and Properties…
Sink and Flat Analysis
User’s Manual » Features » Tool Bar » Micro-Drainage Tools » Rural DEM Processing » Sink and Flat Analysis
In hydrological analysis, it is crucial to start with a depressionless Digital Elevation Model (DEM) to ensure accurate results. These steps are essential for tasks such as determining flow directions and accumulations, and delineating drainage networks and…
9 Water Balance Processes in Continuous Simulation
Reference Guide » 9 Water Balance Processes in Continuous Simulation
The water balance in snow pack, depression storage and active soil zone is simulated to extend the single-event simulation to continuous. This chapter describes the equations used in these processes.
Step 12: Set Run Options and Run the Simulation
Tutorials » Quick Start Tutorial » Step 12: Set Run Options and Run the Simulation
Double click “Scenario 1 – 2 Year 6 Hour AES (Bloor, TRCA)” under the Runs group in the Project Manager. The run setting page will pop up. Make sure the time and the date are set as below. Click the Run button to finish the simulation. A…
5.6 Use of IUH’s for I/I Simulation and Baseflow (DWF
Reference Guide » 5 Unit Hydrograph Options in Visual OTTHYMO » 5.6 Use of IUH’s for I/I Simulation and Baseflow (DWF
Visual OTTHYMO can be used to simulate the Infiltration/Inflow into sanitary sewers or combined sewers. The four types or rainfall-induced infiltration/inflow are: Fast responses from directly connected impervious areas. Rapid responses from grassed areas in…
Modeling and Analysis of Manhole Inflow & Infiltration Using Dual-Drainage Method
Tutorials » Modeling and Analysis of Manhole Inflow & Infiltration Using Dual-Drainage Method
In the tutorial Dual-Drainage Model, we introduce how to create overland system and build its connection with sewer system. In this tutorial, we will continue the exercise based on the tutorial of Dual-Drainage Model, but focus on the sanitary manhole II modeling and…
Tool Bar
User’s Manual » Features » Tool Bar
Following lists are present at the top of the VOSWMM main interface. For a more detailed description of each Toolbar item, please click on each topic to navigate. File Home Simulation GIS Tools Micro-Drainage
Step 1: Undeveloped Site – Model Setup
Post-Development Runoff (backup) » Step 1: Undeveloped Site – Model Setup
The SWMM model for the undeveloped site is depicted below. It consists of a single Subcatchment S1 whose runoff drains to Outfall node O2. Note that the undeveloped site contour map has been used as a backdrop image. The scenario name is undeveloped. Utilizing a…
4.3.2 Importing SWMM5
VO-SWMM » 4 Working Projects and Scenarios » 4.3 Importing Scenarios from Model Data Files » 4.3.2 Importing SWMM5
The catchment and channel systems in SWMM can be imported to VO. The subcatchments are converted to either NasHyd or StandHyd based on the imperviousness and the open channel is converted to RouteChannel. It is not recommended to import models with detailed sewer…
SWMM5 Data
User’s Manual » Features » Tool Bar » Simulation » Simulation – Data » SWMM5 Data
In the Data section of the Simulation tab, all data types like transect, curves and climatology etc are defined in the same way as SWMM5. Icon Function Icon Function Transects Curves Climatology …
10.3 Calibration Files
VO-SWMM » 10 Visual OTTHYMO Files » 10.3 Calibration Files
The calibration files are used to import the observed time series data and compare to the simulation outputs. Two file formats are supported: 1) SWMM format and 2) simple CSV format. SWMM Format The SWMM calibration file format is supported. From SWMM user’s…
Welcome
User’s Manual » Welcome
Welcome to VO Storm Water Management Model (VO-SWMM), the hydrologic & hydraulic model simulation software package. It is an effective hydrologic management software that has been developed for various analyses including Watershed Studies, Sub-watershed Studies, Master…
Result Summary Tables
User’s Manual » Features » Result Summary Tables
Result Summary Tables window provides a spreadsheet environment for showing/editing SWMM simulation result. By default, it’s located at the bottom of the main interface. It can be toggled on/off via Tool Bar > Home > Windows. Result Summary Tables will be reset…
Dual-Drainage Modeling Procedure
User’s Manual » Features » Tool Bar » Micro-Drainage Tools » Dual-Drainage Modeling Procedure
In the stormwater management system, on the one hand, the stormwater collection is often done via catch basin. Catch basins are used to catch overland flow and transport the water to underground sewer system. On the other hand, the overland inflow can also entre…
Micro-Drainage Tools
User’s Manual » Features » Tool Bar » Micro-Drainage Tools
Micro Drainage is a modeling methodology for analyzing surface and sewer drainage system performance using the best-available information. Micro Drainage analysis models the precipitation flowing from overland system into the minor system through catch basins acting…
D. Radar
VO-SWMM » D. Radar
This unique VO-SWMM feature is an improved way to generate the watershed surface. Ground corrected radar leverages the computational power. Rainfall radar and other distributed rainfall techniques are used for pre- and post-storm event forensic analysis and system…
Practical Example of VOSWMM for Students
Practical Example of VOSWMM for Students
This tutorial revolves around using EPA SWMM resources to practically implement projects with VOSWMM. We’ll follow step-by-step guides based on the “Storm Water Management Model Applications Manual” by Jorge Gironás, Larry A. Roesner, and Jennifer…
Manhole Inflow and Infiltration Modeling
User’s Manual » Features » Tool Bar » Micro-Drainage Tools » Dual-Drainage Modeling Procedure » Manhole Inflow and Infiltration Modeling
As described in the Dual-Drainage Modeling Procedure, the inflow and infiltration entering the sewer via manhole can be modelled by outlet links’ rating curves. The first step of manhole inflow and infiltration (I&I) modeling to know which type of manholes are…
7.2.2 Watersheds Studies
Reference Guide » 7 Design Storms for Stormwater Management Studies » 7.2 Methodology for Comparing Design Storms and a Historical Storm Series » 7.2.2 Watersheds Studies
Three different types of watersheds were examined in this study; a rural watershed, an urban watershed and a mixed land use watershed. Two rural watersheds in southern Ontario were tested, one was large and had an area of 6540 ha. the other was small having an area of…
Engine Options
User’s Manual » Features » Tool Bar » Simulation » Simulation – Run and Options » Engine Options
Engine Options Click the Engine Options button. In the pop-up window, set parameters used by the SWMM5 engine. *Please note that the settings will be used in the same way as in EPA SWMM5. The EPA SWMM User’s Manual is the reference for this part. The…
Step 19: Generate and Import Capture Curve
Tutorials » Dual-Drainage Model » Step 19: Generate and Import Capture Curve
Select all the Outlet links in the Parameter Tables and change the Rating Curve field in the Properties tab to TABULAR_DEPTH. Generate Capture Curves The capture curves can be calculated based on type, multiplier, slope and curves of catch basins. Therefore, they…
References
Reference Guide » References
1. Arnell Viktor, “Rainfall Data for the design of Sewer Pipe Systems” Report Series A:8, Department of Hydraulics, Chalmers University of Technology, 1982. 2. Arnell Viktor, “Analysis of Rainfall Data for use in Design of Storm Sewer Systems”…
Features
User’s Manual » Features
VO-SWMM not only utilizes Microsoft’s latest .Net Framework, 4.0 but also uses WPF (Windows Presentation Foundation) to enhance user experience through the graphical user interface. VH SWMM has new features that improve the efficiency of creating and simulating…
Model Results
Practical Example of VOSWMM for Students » 2. Surface Drainage Hydraulics » Model Results
Culvert Sizing Before comparing alternative routing methods in SWMM, it’s essential to determine culvert diameters in the conveyance system. This involves finding the smallest size from Table 2-5 for each culvert, ensuring it handles 100-year, 2-hour storm…
E. Capture Curves
VO-SWMM » E. Capture Curves
Emphasis is not only on peak flow reduction but also storm Water Quality Control (WQC). Urban stormwater management practices, therefore, include the designing of retention ponds, infiltration systems, wetlands, etc. Sizing these WQC basins are very important. Contrary…
GIS – System Type Filter
User’s Manual » Features » Tool Bar » GIS Tools » GIS – System Type Filter
Toggle on or off to display or hide certain types of systems. User can define five system types: Overland, Storm, Sanitary, Combined, and Other, in Properties Tab. *Please note that the system type will not affect hydraulic simulation results, but it will…
File Menu
User’s Manual » Features » Tool Bar » File Menu
Icon Command Description New Project Create a new project Open Project Opens an existing project. VO-SWMM allows to open a VO-SWMM project (.voprj) or a INP file (.inp) Save Project …
Importing of Scenarios
User’s Manual » Features » Tool Bar » File Menu » Import OTTHYMO to VOSWMM » Importing of Scenarios
When importing a OTTHYMO project, all the scenarios of that OTTHYMO project will be imported. The settings of each scenario follows the description as below: Scenario properties Name = OTTHYMO Scenario Name Description = OTTHYMO Scenario Description SWMM5 Engine =…
Editing a Group of Objects
User’s Manual » Features » Object Parameters and Results » Properties Tab » Editing a Group of Objects
There are several ways to select multiple objects: Select on Schematic/Map View Select on Parameter Tables Select on Result Summary Tables The common fields of those selected objects will be listed in Properties tab. On the top of Properties tab shows the number…
Error List
User’s Manual » Features » Error List
The Error List window shows the errors and warnings in the model. By default, it’s located at the bottom of the main interface. Certain rules apply to an VO-SWMM model. If these rules are not met, a warning or an error will show in the Error List window. The…
Model Results
Practical Example of VOSWMM for Students » 5. Runoff Water Quality » Model Results
We ran both the EMC washoff model (Example5-EMC.inp) and the exponential washoff model (Example5-EXP.inp) for 0.1 in., 0.23 in., and 2-year rainfall events, with the following analysis options: Simulation Period: 12 hours Antecedent Dry Days: …
Automate Transect
User’s Manual » Features » Tool Bar » Micro-Drainage Tools » Automate Transect
The Automate Transect feature in VO SWMM is a tool designed to streamline the process of assigning cross-sections to conduits in your stormwater modeling projects. This manual will provide you with a clear understanding of what this feature is and how to use it…
What’s VO Suite
User’s Manual » What’s VO Suite
VO Suite is one installer and platform that hosts two products: VO-OTTHYMO and VO-SWMM. Users can have access to one or both of them based on their choices of license. This manual will introduce VO-SWMM. For VO-OTTHYMO, please refer to the VO-OTTHYMO Manual and…
4.1.1 Project Types
VO-SWMM » 4 Working Projects and Scenarios » 4.1 Projects » 4.1.1 Project Types
There are two project types available in VO6: Classic Single-Event OTTHYMO – For single-event simulation with design storms. Typically used for quantifying control purpose. Continuous OTTHYMO – For continuous simulation with long-term climate data. It can be…
Run
User’s Manual » Features » Tool Bar » Simulation » Simulation – Run and Options » Run
Batch Run Click the Run button to open the Batch Run window, where you can set several runs for the active scenario. In the Name column, click on each field and then click again to change the name for each Run. In the Rain Group column, select the rain from the…
2.2 Loss Routine
Reference Guide » 2 Tips for Modeling Ungauged Urban Catchments » 2.2 Loss Routine
In both the United States and Canada, either the Horton’s Method (LOSS = 1) or the CN Method (LOSS = 2) are commonly used for urban catchments. The Proportional Loss Method (LOSS = 3) has been successfully used in France for urban catchments. While the selection of…
Import and Export VOSWMM Models
User’s Manual » Features » Tool Bar » File Menu » Import and Export VOSWMM Models
INP files can be Imported into VO-SWMM and can also be Exported. Import INP Format Select File from main menu window -> Import -> Import SWMM Input File: File path of INP file to be imported into VO-SWMM Generate Layout for Schematic: Checking this will generate…
Properties Tab
User’s Manual » Features » Object Parameters and Results » Properties Tab
Properties window shows all properties of selected hydrologic object(s) or current scenario. To use Properties window: Select single hydrologic object in Map View or Schematic View to view and edit all properties of the object Select multiple hydrologic objects in…
Schematic and Map View
User’s Manual » Features » Schematic and Map View
Turn on/off Schematic VIew: The Schematic View in VO-SWMM project can be turned on/off in the Options of Home. Please follow the descriptions of Home for more details. To see the effect of Schematic View on/off selection, create a new or open a saved project, and the…
Model Setup
Practical Example of VOSWMM for Students » 2. Surface Drainage Hydraulics » Model Setup
Figure 2-4 illustrates the layout of the runoff conveyance system intended for incorporation into the developed site. This system encompasses 7 grass swales, 3 culverts, and a single street gutter. The primary aim here is to assess discharges at the site’s…
Problem Statement
Practical Example of VOSWMM for Students » 2. Surface Drainage Hydraulics » Problem Statement
Figures 2-1 and 2-2 display the pre- and post-development SWMM model layouts from Example 1. In Figure 2-1, the pre-development region was depicted by a single subcatchment, sized according to a 500 ft overland flow limit. The post-development scenario (Figure 2-2)…
Summary
Post-Development Runoff (backup) » Summary
This example used SWMM to estimate the runoff response to different rain events for a 29 ac development that will be built in a natural area. Comparisons were made between the runoff peaks and total volume for each event for both pre- and post-developed conditions. The…
User’s Manual
User’s Manual
This manual provides introductions on VO-SWMM and the use of its basic functions and advanced tools.
New Measured
User’s Manual » Features » Tool Bar » Simulation » Simulation – Data » Resource Library » New Measured
For continuous simulation, the time series data usually comes from monitoring gauges. It is necessary to have the gauge information (e.g. ID and location) included in the Resource Library to enable connect to monitoring database and apply distributed rainfall models.…
4.3 Importing Scenarios from Model Data Files
VO-SWMM » 4 Working Projects and Scenarios » 4.3 Importing Scenarios from Model Data Files
A scenario can be created by importing from model data files. This is useful when 1) the model is in another model platform (e.g. SWMM) or in older VO data files and 2) there is need to integrate a scenario to current project.
A. Seminars and Workshops
User’s Manual » VO-SWMM Support » A. Seminars and Workshops
Smart Water City Inc. hosts seminars and workshops that allow users the opportunity to learn the basics of VO-SWMM and use all its features to their full potential. Seminars and workshops are organized by need. You can find more information from our…
Import OTTHYMO to VOSWMM
User’s Manual » Features » Tool Bar » File Menu » Import OTTHYMO to VOSWMM
Users can import a VO-OTTHYMO project into VOSWMM. If the OTTHYMO model is created on Schematic View, before importing to VOSWMM, please make sure the Schematic View is turned on for VOSWMM project in the Home ribbon Options, so the importing can add models to the…
Step 17: Export INP File
Tutorials » Quick Start Tutorial » Step 17: Export INP File
Click the File button on the left upper corner. Navigate to the Export and choose Export to SWMM INP File. In the pop-up window, choose the location where to put the INP file.
7.3.2 Urban Watersheds
Reference Guide » 7 Design Storms for Stormwater Management Studies » 7.3 Results of Peak Flows from Design Storms and Historic Storm Events » 7.3.2 Urban Watersheds
The dependence of the historic storm flows to the peak intensity and antecedent moisture conditions were examined on the urban catchments. The peak intensity was found to be an important factor in determining the peak flows. The correlation between the peak intensity…
Model Setup
Practical Example of VOSWMM for Students » 1. Post-Development Runoff » Model Setup
Within VOSWMM, the capability to generate or import various scenarios exists. To proceed, navigate to the File tab and choose Import for Example1-Post. Afterward, integrate a background make necessary adjustments to command locations. Now, you possess both…
Time Series
User’s Manual » Features » Tool Bar » Simulation » Simulation – Data » SWMM5 Data » Time Series
The Time Series Editor is used when creating or editing Time Series objects. Click the Time Series button to open the Time Series Editor window. Button Description Add one time-series dataset Delete selected time-series…
Groundwater
User’s Manual » Features » Tool Box » Hydrology » Subcatchment » Groundwater
Groundwater parameters should be applied to model the groundwater flow between an aquifer and the drainage system node. Parameter Name Description Default Value Aquifer Aquifer object that lies below subcatchment (leave blank for no…
3. Detention Pond Design
Practical Example of VOSWMM for Students » 3. Detention Pond Design
Example 3 explains the process of creating, designing, and assessing a detention pond using SWMM. The detention pond, designed for water quality capture and peak flow control, employs storage components, orifices, and weirs. It models an urban catchment akin to…
GIS Tools
User’s Manual » Features » Tool Bar » GIS Tools
With VOSWMM, we are introducing TatukGIS that will be built into the program. No additional GIS license is required to use Tatuk Map. Users can now choose an ArcGIS or TatukGIS map from Home Tab Options. Note that an ArcGIS license is required to use the ArcGIS map. …
VOSWMM Main Interface
User’s Manual » Features » VOSWMM Main Interface
After installation, the initial interface is in VO. To switch to VOSWMM, click File drop-down list. In the New Project, select New SWMM Project. The VOSWMM main interface will show.
Model Setup
Practical Example of VOSWMM for Students » 5. Runoff Water Quality » Model Setup
In this example, we’ll focus solely on Total Suspended Solids (TSS) as a key water quality parameter. TSS is a common pollutant in urban stormwater, often found at high concentrations. Reported TSS EMCs range from 180 to 548 mg/L (U.S. EPA, 1983) and 225 to 400…
4. Low Impact Development
Practical Example of VOSWMM for Students » 4. Low Impact Development
This example shows how to model two Low Impact Development (LID), filter strips and infiltration trenches, within SWMM. Unlike the previous Example 3, which focused on large-scale detention ponds, these LIDs work on a smaller scale and rely on infiltration and…
5. Runoff Water Quality
Practical Example of VOSWMM for Students » 5. Runoff Water Quality
This example demonstrates simulating pollutant accumulation and washoff in an urban area, considering different land uses and using Event Mean Concentrations (EMCs) and exponential functions for washoff. Surface runoff quality is crucial yet complex in wet-weather flow…
Transect Feature Tutorial
Tutorials » GIS Tools » Transect Feature Tutorial
In this tutorial, you will learn how to use the Automate Transect feature in VO SWMM to assign cross-sections to conduits using a DEM file and a cross-section layer. Follow these steps to successfully utilize this powerful tool: Prerequisites Before you begin, ensure…
Step 26: Save Project and Export INP File
Tutorials » Dual-Drainage Model » Step 26: Save Project and Export INP File
Click the Save Project button in the Home tab. Click the File button on the left upper corner. Navigate to the Export and choose Export to SWMM INP File. In the pop-up window, choose the location where to put the INP file.
7.4 Conclusions
Reference Guide » 7 Design Storms for Stormwater Management Studies » 7.4 Conclusions
Simulations with the Chicago and SCS 24-hr design storms were compared with a series of real storms to determine if the flow frequency results they produce are reliable. The design storms and a historical storm series were tested on rural, urban and mixed land use…
Step 5: Analyze Manhole Inflow
Tutorials » Modeling and Analysis of Manhole Inflow & Infiltration Using Dual-Drainage Method » Step 5: Analyze Manhole Inflow
For more information about the tools and its analyzed indices, please refer to Manhole Inflow Analysis. Navigate to Simulation toolbar and click the Manhole Inflow Analysis button. In the pop-up Manhole Inflow Analysis window, select the Run and click Yes to update…
Control Rules
User’s Manual » Features » Tool Bar » Simulation » Simulation – Data » SWMM5 Data » Control Rules
Click the Control Rules button to open the Control Rules window. Type in the window the control rules in the same way as in SWMM5 format. Control Rules dictate the manner in which pumps and regulators within the conveyance system are modified during the…