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LIDs and Water Quality Single-Event Model
Tutorials » LIDs and Water Quality Single-Event Model
We will learn how to model water quality and LIDs in VO in two exercises. tutorial – LIDs and Water Quality Single-Event Model (this tutorial) tutorial – LIDs and Water Quality Continuous Model This exercise will focus on single-event model. It covers the…
LIDs and Water Quality Continuous Model
Tutorials » LIDs and Water Quality Continuous Model
This is a follow-up exercise of utorial – LIDs and Water Quality Single-Event Model. The exercise project uses the same model layout and scenarios as in the single-event model, but it uses continuous climate data and we will run the continuous simulation for 1…
10.1.8 Water Quality
Reference Guide » 10 Low Impact Development Controls » 10.1 Governing Equations » 10.1.8 Water Quality
Pollutant Generation Pollutant generated at a catchment is calculated with the Event Mean Concentration (EMC) and area of each landuse. where: and – concentrations of TSS and TP of a catchment and – percentage of a land use type i, defined as a…
7.5.7 Adding Water Quality
User’s Manual » 7 Working with Resource Library » 7.5 Adding New Items » 7.5.7 Adding Water Quality
In the Library Explore, select the group where the new Water Quality will be located. Click the Water Quality button in the Water Quality toolbar, the LandUse table appears with default LandUse types, User can make changes to the Basic Information section and to…
9.2.4 Water Quality Data
User’s Manual » 9 Working with Output » 9.2 Single-Event Simulation Outputs » 9.2.4 Water Quality Data
This output feature allows the user to view the actual water quality results in Water Quality Results window found at the bottom of VO.
3.17 Water Quality Results
User’s Manual » 3 Conceptual Model » 3.17 Water Quality Results
The Water Quality Results window is the same window appearing for single-event simulation and continuous simulation. By default, this window is at the bottom of the main interface. It’s used to show the water quality summary results of each hydrologic object. In…
8.2 Single-Event Simulation
User’s Manual » 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…
2.6 Running Single-Event Simulations
User’s Manual » 2 Quick Start Tutorial » 2.6 Running Single-Event Simulations
A simulation is to apply a rainfall to a drainage network to calculate hydrograph. A simulation run can be created by combining the rainfall (design storm) and drainage network (scenario). To create a simulation, click the Run button located at the Simulation tab to…
9.2 Single-Event Simulation Outputs
User’s Manual » 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.
Step 3: Add Water Quality in Model
Tutorials » LIDs and Water Quality Single-Event Model » Step 3: Add Water Quality in Model
This table contains TP and TSS loading rates for different land uses in mg/L. We will be using the default water quality table found in the Resources Library, however users may duplicate this table and edit/add land use types and loading rates. If you choose to…
7.9 Adding Water Quality Data to Model
User’s Manual » 7 Working with Resource Library » 7.9 Adding Water Quality Data to Model
Water quality calculations have been added in VO 5.2. Total suspended solids (TSS) and total phosphorus (TP) loading and removal rates can be specified and calculated in the model. The user can input loading rates based on existing or proposed land use. To add water…
2.7 Viewing Single-Event Simulation Outputs
User’s Manual » 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…
2.2 Project Setup for Single-Event Model
User’s Manual » 2 Quick Start Tutorial » 2.2 Project Setup for Single-Event Model
To create a single-event OTTHYMO project, select File -> New Project -> New Otthymo Project. To have a reference to place the hydrologic objects, a background picture can be added to the canvas. To add the background, switch to Schematic View and choose…
Step 1: Create a New Single-Event Project
Tutorials » Analyzing Erosion for New Development » Step 1: Create a New Single-Event Project
The single-event model will be used to verify the model performance under design storms, for example, using it for pond sizing under 4-hour Chicago design storms with 20mm, 25mm and 30mm respectively. To create a new single-event project, navigate to File tag at the…
9.3.4 Water Balance
User’s Manual » 9 Working with Output » 9.3 Continuous Simulation Outputs » 9.3.4 Water Balance
The analysis results of Water Balance will tell how the water is routed among different sectors, like evapotranspiration, infiltration and surface runoff. The results can be found in two places. One is the Water Balance Results table, which is by default located at the…
9.3.2 Wetland Water Balance
User’s Manual » 9 Working with Output » 9.3 Continuous Simulation Outputs » 9.3.2 Wetland Water Balance
The Wetland Water Balance output is best represented using the scenario comparison tool . This tool provides graphical results for the Wetland Water Balance command and allows users to plot results for multiple scenarios as a time series or water balance graph. It…
Step 3: Run Simulations for Post-Development Conditions without LIDs
Tutorials » LIDs and Water Quality Continuous Model » Step 3: Run Simulations for Post-Development Conditions without LIDs
Following the similar procedure to run and view results for the scenario of post-development conditions without LIDs. Find the scenario “Post-Dev. Initial” under the Drainage Network Scenarios group in the Project Manager. Double-click the scenario to open…
Step 4: Run Simulations for Post-Development Conditions with LIDs
Tutorials » LIDs and Water Quality Continuous Model » Step 4: Run Simulations for Post-Development Conditions with LIDs
Following the similar procedure to run and view results for the scenario of post-development conditions with LIDs. Find the scenario “Post-Dev. Solved” under the Drainage Network Scenarios group in the Project Manager. Double-click the scenario to open it…
Step 4: Create a New Continuous Model from the Single-Event Model
Tutorials » Analyzing Erosion for New Development » Step 4: Create a New Continuous Model from the Single-Event Model
The continuous project will be used for model calibration and long-term simulation. Save the Single-Event Project Before working on a continuous project, save the single-event project. Click Save Project button in the Home toolbar to save all information (including…
9.2 Snow Pack Water Balance
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.2 Snow Pack Water Balance
The snowmelt model in GAWSER (Guelph All-Weather Sequential-Events Runoff Model) (Schroeter & Associates, 1996) was used to model the snow pack water balance. Six processes (refreeze, compaction, new snow deposition, rain deposition, snowmelt and release of liquid…
9.2.7 Release of Liquid Water
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.2 Snow Pack Water Balance » 9.2.7 Release of Liquid Water
The maximum amount of liquid water that can be held in the pore spaces of a snowpack by capillary forces is referred to as the liquid water holder capacity, LWCAP and is computed using: where SWI is the irreducible water saturation and is expressed as a fraction of…
9.3 Depression Storage Water Balance
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.3 Depression Storage Water Balance
The liquid water released from snow pack flows into depression storage first. It will first fill the available storage and then flow out. The storage is then restored through evaporation and infiltration (in pervious area). where: = the amount of water flow out…
Step 11: Create Scenarios for Post-Development with Controls in the Single-Event Model
Tutorials » Analyzing Erosion for New Development » Step 11: Create Scenarios for Post-Development with Controls in the Single-Event Model
We will use a pond as a mitigation structure and compare the results from 6 control scenarios, and we will test the mitigation scenarios in the single-event project using 4-hr Chicago design storms: 20mm, 25mm and 30mm. They are differentiated in terms of the Rating…
9.2.5 Refreeze of Snowpack Liquid Water
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.2 Snow Pack Water Balance » 9.2.5 Refreeze of Snowpack Liquid Water
During periods of below freezing temperature, liquid water in the pack will refreeze thereby increasing the solid water content. The potential amount of refreeze during a given time interval is calculated using a temperature index method similar to snowmelt. …
9.4 Active Soil Zone Water Balance
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.4 Active Soil Zone Water Balance
The water balance in active soil zone (pervious area) is simulated as where: = the amount of water stored in soil (mm), = the initial amount of water in soil (mm), = the runoff from depression storage (mm), ICRO = the effective runoff from indirectly connected…
3.16 Hydrograph Results / Water Balance Results
User’s Manual » 3 Conceptual Model » 3.16 Hydrograph Results / Water Balance Results
The Hydrograph Results and Water Balance Results window is the same window which appears differently for single-event simulation and continuous simulation. By default, this window is at the bottom of the main interface. It’s used to show the summary results of each…
8.8 Illinois State Water Survey Design Storm
Reference Guide » 8 A Review of Design Storm Profiles » 8.8 Illinois State Water Survey Design Storm
The Illinois State Water Survey (ISWS) design storm is based on research conducted by Huff (1967). Huff examined storm events in central Illinois having durations between 3 hours to 48 hours. He divided the storms into 4 groups depending on the time period in which the…
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.
9.4.1 Water Contributed from Indirectly Connected Impervious Area
Reference Guide » 9 Water Balance Processes in Continuous Simulation » 9.4 Active Soil Zone Water Balance » 9.4.1 Water Contributed from Indirectly Connected Impervious Area
ICRO is the net contribution of water from impervious surfaces onto pervious surfaces referred to as ‘indirectly connected impervious areas’. This net factor accounts for several physical conditions reduce the impacts of indirectly connected impervious areas on…
Step 5: Water Balance Analysis for Bioretention Tank
Tutorials » LIDs and Water Quality Continuous Model » Step 5: Water Balance Analysis for Bioretention Tank
We will investigate how LIDs can improve on runoff controls by comparing water balance distributions before and after the LIDs. Click on the scenario tab “Post-Dev. Solved” on the Schematic view to show the post-development scenario with LIDs. Zoom…
1.3.5 Seminars and Workshops
User’s Manual » 1 Introduction » 1.3 VO Help Support » 1.3.5 Seminars and Workshops
Smart Water City Inc. hosts seminars and workshops that allow users the opportunity to learn the basics of VO and use all its features to their full potential. Seminars and workshops are organized by need. You can find more information from our…
3.5.1 ROUTECHANNEL and COMPOUNDCHANNEL
User’s Manual » 3 Conceptual Model » 3.5 Flow Routing Hydrologic Objects » 3.5.1 ROUTECHANNEL and COMPOUNDCHANNEL
RouteChannel is used to route hydrographs through typical channel cross-sections using the Variable Storage Coefficient (VSC) Method. The open channel cross-sections are described with X and Y co-ordinates. The COMPOUNDCHANNEL command in VO6 has been split to calculate…
7.3.4 Drag and Drop
User’s Manual » 7 Working with Resource Library » 7.3 Library Explorer » 7.3.4 Drag and Drop
The items in Library Explorer supports drag-and-drop for various functions based on the type of source and destination item. Examples are: Move item from one group to another Apply IDF to Chicago design storm Add design storm and temperature data to Project…
11.1 Error and Warning Messages
User’s Manual » 11 Troubleshooting » 11.1 Error and Warning Messages
Error and warning messages can appear within the interface and within the Detailed Output Files. The messages stem from an input error or computational error, which is likely caused by the input variables. This section outlines the most common messages and gives a…
1.6.1 Hardware and Software Requirements
User’s Manual » 1 Introduction » 1.6 Installing Visual OTTHYMO » 1.6.1 Hardware and Software Requirements
Before you install VO, make sure that your computer meets the minimum requirements listed below. The minimum system requirements for all versions of the program are given in Table 1-2. TABLE 1-2: SYSTEM REQUIREMENTS Minimum Requirements: …
8.3.2 Creating and Running Simulations
User’s Manual » 8 Running a Simulation » 8.3 Continuous Simulation » 8.3.2 Creating and Running Simulations
To create a continuous simulation, click the Run button located at the Simulation tab to open the Batch Run window. This layout is similar to the single-event simulation and has more columns which are described below. The first and second columns are the same as…
4 Working Projects and Scenarios
User’s Manual » 4 Working Projects and Scenarios
This chapter discusses how to use projects and scenarios to manage multiple models, such as models for existing and post-development condition. To the user, a project may represent a specific type of work which consists of multiple hydrologic models. Each model in a…
6.9.2 Sink and Flat Analysis
User’s Manual » 6 Working with the Map » 6.9 Rural DEM Processing » 6.9.2 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 basins. Step…
8.11 Pilgrim and Cordery Design Storm
Reference Guide » 8 A Review of Design Storm Profiles » 8.11 Pilgrim and Cordery Design Storm
The Pilgrim and Cordery design storm was developed to provide an approach which would produce storm patterns consistent with the storm patterns of historical events. To develop the Pilgrim and Cordery Design Storm, a duration is selected and a set of events with a…
8.12 Yen and Chow Design Storm
Reference Guide » 8 A Review of Design Storm Profiles » 8.12 Yen and Chow Design Storm
All of the previously discussed design storms were developed from rainfall frequency- duration relationships or from observations of rain gauge records, they did not use a statistical procedure to analyze the historical rainfall record. Yen and Chow (1980) use the…
Step 5: Setup and Run Simulation
Tutorials » Working with a Continuous Model » Step 5: Setup and Run Simulation
Click the Run button in the toolbar. The Batch Run window will appear. To create a simulation run, click the Add button in the toolbar of Batch Run. Select Precipitation and Temperature files and check the starting and ending dates as shown in the figure below. The…
9.2.5 Traditional Detailed and Summary Output
User’s Manual » 9 Working with Output » 9.2 Single-Event Simulation Outputs » 9.2.5 Traditional Detailed and Summary Output
When a simulation is run successfully, VO generates traditional Summary Output and Detailed Output and stores them in the project folder. For those new to VO, the Summary Output file is a text-based file that contains the key output data for each object during each…
The difference between TIMP and XIPM
FAQ » The difference between TIMP and XIPM
What is the difference between TIMP and XIMP? can you explain it with an example? I explain it in the following images:
Map Window Customization and Layer Styling
Tutorials » Generating Subcatchments in Urban Areas with VO GIS Tools » Map Window Customization and Layer Styling
Once you have generated subcatchments in urban areas using VO GIS Tools, you can customize the map window and apply different styles to enhance visibility. Follow these steps: 1. On the left side of the Map window, locate the layer called “FlowPath”. This…
Step 16: Save and Close Project
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 16: Save and Close Project
Since all work is done, we want to save all of our works. Click Save Project button in the Home toolbar to save all information (including all commands and storms) to a project file. Now, it’s safe to close the application.
Step 16: Save and Close Project
Tutorials » LIDs and Water Quality Single-Event Model » Step 16: Save and Close Project
Since all work is done, we want to save all of our works. Click Save Project button in the Home toolbar to save all information (including all commands and storms) to a project file. Now, it’s safe to close the application.
Tutorials
Tutorials
The following tutorials will help you get familiarized with VO about its basic functions and some advanced tools. In each tutorial, there is a step-by-step instruction and a attachment folder that contains models and data to be used. *ENJOY YOUR LEARNING! Creating a…
Step 12: Save and Close the Project
Tutorials » Creating a VO Model in Schematic View » Step 12: Save and Close the Project
Since all the work is done, we want to save all of our work. Click the Save Project button to save all information (including all hydrologic objects and storms) to a project file. Now, it’s safe to close the application.
2.9 Adding Long-term Precipitation and Temperature
User’s Manual » 2 Quick Start Tutorial » 2.9 Adding Long-term Precipitation and Temperature
Same as design storm, long-term precipitation and temperature can be added from Resource Library to Project Manager by drag-and-drop.
7.6.1 Coping and Pasting A, B, C
User’s Manual » 7 Working with Resource Library » 7.6 Assigning IDF to Chicago Design Storm » 7.6.1 Coping and Pasting A, B, C
To copy and paste A, B, C from an IDF curve to a Chicago design storm: Select the desired IDF curve in Library Explorer. In the Main View, click the Copy A,B,C button to copy the A, B, C values. Note that if the fitted A, B, C is invalid, the values can’t be…
6.4.8 Moving, Editing and Deleting Hydrologic Objects
User’s Manual » 6 Working with the Map » 6.4 Using the Map » 6.4.8 Moving, Editing and Deleting Hydrologic Objects
The shape of the hydrologic object features can be edited and deleted on the map. To do this: Select Edit Tool in GIS tab or map context menu. Select the hydrologic object feature on map. To move a feature, move the cursor on top of the selected feature and then…
4.3.3 Importing Visual OTTHYMO V2.4 and Later
User’s Manual » 4 Working Projects and Scenarios » 4.3 Importing Scenarios from Model Data Files » 4.3.3 Importing Visual OTTHYMO V2.4 and Later
Importing a Visual OTTHYMO v2.4 and higher project file (*.voprj) is necessary when you want to bring an existing scenario into your current project. This may be necessary if you are combining projects or if you want to use an existing model scenario to build a new…
Step 7: Connect NasHyds, RouteChannels and AddHyds
Tutorials » Creating a VO model with Existing GIS Data » Step 7: Connect NasHyds, RouteChannels and AddHyds
On the Map view, click the Add Link tool in the GIS ribbon. Make sure the Vertex is selected in the Snapping tools. First, move the Support layer on top of the Hydrographs layer, so we can see the connection lines after adding connections. Add link from a NasHyd…
Step 9: Save Project and Run Simulation
Tutorials » Creating a VO model with Existing GIS Data » Step 9: Save Project and Run Simulation
Run the model using the Run button in the Simulation toolbar. Click the Save button in the Home toolbar to save the project. For information about how to load different rain data from Resource Library, view the exercise Using Resource Library
8.2 Frequency of Real Storms and Synthetic Storms
Reference Guide » 8 A Review of Design Storm Profiles » 8.2 Frequency of Real Storms and Synthetic Storms
The design storms developed from IDF curves are not representative real storm events. This is because the method of analyzing rainfall to obtain the IDF curves is independent of the real storm events. Each annual maximum volume for the 5, 10, 15, 30, 60, 120, 360, 720-…
Step 7: Connect StandHyd and NasHyd to RouteChannels
Tutorials » Creating a VO Model in Schematic View » Step 7: Connect StandHyd and NasHyd to RouteChannels
The hydrograph generated at StandHyd and NasHyd will go to downstream channels as shown below. If there is no channel available downstream, it will go out of the system, which could be represented by an AddHyd. The connection is represented by a connector between…
Step 6: Create and Run Post-development Model
Tutorials » LIDs and Water Quality Single-Event Model » Step 6: Create and Run Post-development Model
Open the scenario “Post-Dev. Initial” which is shown in the Project Manager window. Run the simulation by clicking the Run button in the Simulation toolbar, and the results will display in labels. This model is the same as the “Pre-Dev.…
Step 1: Open and Run Pre-development Model
Tutorials » Sizing a Pond Using the Route Reservoir Command » Step 1: Open and Run Pre-development Model
1. Open …\model\pond_sizing.voprj. To open the pre-development model, navigate to the Project Manager and double click scenario “Existing Conditions”. The pre-condition schematic view will be displayed. 2. Run the simulation Click the Run button…
The ADS system has multiple rows of chambers. However, VO asks for only 1 rating curve and outputs only 1 value for outflow. Is the software conceptualizing all the rows into a single row of chambers?
FAQ » The ADS system has multiple rows of chambers. However, VO asks for only 1 rating curve and outputs only 1 value for outflow. Is the software conceptualizing all the rows into a single row of chambers?
What manufacturer you have selected? For StormTech, you just need to know the number of chambers. This means it does not matter whether the chambers have been in rows or not. The number of rows is not a parameter for StormTech. For Triton, you must enter the number…
Step 8: Create AddHyds and Connect all Hydrologic Objects
Tutorials » Creating a VO Model in Schematic View » Step 8: Create AddHyds and Connect all Hydrologic Objects
Now, two StandHyds and one NasHyd have been connected to the RouteChannel. The other two NasHyds don’t have a downstream channel. Instead, all the hydrographs will be added together at the watershed outlet. To represent this, add an AddHyd to add hydrographs from…
7.5.6 Adding Precipitation, Temperature, Evaporation, Groundwater and Flow Data
User’s Manual » 7 Working with Resource Library » 7.5 Adding New Items » 7.5.6 Adding Precipitation, Temperature, Evaporation, Groundwater and Flow Data
The monitoring precipitation, temperature and evaporation data is added to corresponding gauges from a data file. To do this: Select the gauge first and then click the proper Read-in button in the Toolbar. In the New Monitored Data window, click the Browse ……
Step 6: Setup and Run Simulation for Model Calibration
Tutorials » Analyzing Erosion for New Development » Step 6: Setup and Run Simulation for Model Calibration
Click on the Existing scenario tab to show the Schematic view of the existing scenario, because we will use the Existing scenario for model calibration. Click the Run button located at the Simulation tab. In the opened Batch Run window, make sure your setting is…
Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis
In this exercise, we will create a VO model for the wetland shown below. It has one (1) contributing rural catchment. This exercise will mainly focus on building a continuous VO model, running the simulation, calibrating the model and analyzing the results. You…
Step 8: Setup Batch Simulation and Run the Model
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 8: Setup Batch Simulation and Run the Model
Click the Run button located in the Run the Model tab to open the Batch Run window. To add a simulation run, click the Add button in the toolbar of Batch Run. Select Precipitation, Temperature, Evaporation and Groundwater data. The Starting Date and Ending Date…
Step 1: Open VO and Create a new Otthymo Project
Tutorials » Creating a VO Model in Schematic View » Step 1: Open VO and Create a new Otthymo Project
Navigate to File tag at the top and create a New Otthymo Project
Step 1: Open VO and create a Continuous Otthymo project
Tutorials » Working with a Continuous Model » Step 1: Open VO and create a Continuous Otthymo project
1. Navigate to File -> New Project and select New Continuous Otthymo Project 2. To import Single-event VO Model, use menu File -> Import -> Import VH Scenario (Current project) and browse to the training package. Open…
Step 4: Add Precipitation and Temperature Data to the Project
Tutorials » Working with a Continuous Model » Step 4: Add Precipitation and Temperature Data to the Project
Select the precipitation data “TORONTO_AIRPORT_PRECIP” and add it to the Project Manager by one of the following three ways: Right click the selected rain data to open the context menu and select Add to model… Click the Add to Model button at the…
7.6.2 Dragging and Dropping IDF Curve to Chicago Design Storm
User’s Manual » 7 Working with Resource Library » 7.6 Assigning IDF to Chicago Design Storm » 7.6.2 Dragging and Dropping IDF Curve to Chicago Design Storm
To use drag-and-drop to assign the IDF curve information to a Chicago design storm: Select the desired IDF curve in Library Explorer. Keep the left mouse button pressed and drag it over the Chicago design storm in Library Explorer. Notice that the mouse cursor…
Step 5: Edit the RouteWetland Discharge and Depth-Area Curves
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 5: Edit the RouteWetland Discharge and Depth-Area Curves
Discharge Curve To edit Discharge Curve of RouteWetland, click the button next to the Discharge Curve field in the Properties tab to open the Discharge Curve Editor window. Find the discharge curve table at “…\data\discharge curve.csv”. Copy…
7.2 Methodology for Comparing Design Storms and a Historical Storm Series
Reference Guide » 7 Design Storms for Stormwater Management Studies » 7.2 Methodology for Comparing Design Storms and a Historical Storm Series
This section compares the design storms and real measurement data.
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…
Step 1: Open VO and create a new Continuous Otthymo project
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 1: Open VO and create a new Continuous Otthymo project
Open VO. Click the Options button in the Home tab and set the options as below. Click OK to save and close Options window. Close and restart VO. Navigate to File -> New Project. Select New Continuous Otthymo Project This will create a new project with a default…
Step 1: Set VO Map Options and Create a New Project
Tutorials » Creating a VO model with Existing GIS Data » Step 1: Set VO Map Options and Create a New Project
Open Option in the Home tab Make sure the General and GIS setting as below: Close VO and reopen it. Make sure you can see the Map tab in the canvas and it is centered on the Toronto area by default. To create a new project, navigate to File -> New Project…
7.3 Results of Peak Flows from Design Storms and Historic Storm Events
Reference Guide » 7 Design Storms for Stormwater Management Studies » 7.3 Results of Peak Flows from Design Storms and Historic Storm Events
This section compares the peak flow results of design storms and measurement rainfall data for different types of watersheds.
A.5.1 Wetland in Continuous Project – Hydroperiod and Inflow Mass Curve
User’s Manual » 12 Appendix A – Tools » A.5 Scenario Comparison » A.5.1 Wetland in Continuous Project – Hydroperiod and Inflow Mass Curve
For RouteWetland command, there are two extra tabs called Hydroperiod and Inflow Mass Curve for Continuous project. In those two tabs, VO uses the results of one pre-development scenario to calculate difference from the other scenarios to the pre-development scenario.…
7.5.5 Adding Rain Gauge, Temperature Gauge, Evaporation Gauge, Groundwater Gauge and Flow Gauge
User’s Manual » 7 Working with Resource Library » 7.5 Adding New Items » 7.5.5 Adding Rain Gauge, Temperature Gauge, Evaporation Gauge, Groundwater Gauge and Flow Gauge
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.…
Step 17: Compare Erosion Indices for Existing Scenario, Post Scenario and Control Scenarios
Tutorials » Analyzing Erosion for New Development » Step 17: Compare Erosion Indices for Existing Scenario, Post Scenario and Control Scenarios
Scenario Comparison can compare RouteChannel results in three erosion indices: Time of Exceedance, Cumulative Erosion Index and Cumulative Effective Work Index. Click Scenario Comparison button in the Simulation toolbar. In the opened Scenario Comparison window,…
Step 10: Compare Erosion Indices for Existing Scenario and Post-Development Scenario without Control
Tutorials » Analyzing Erosion for New Development » Step 10: Compare Erosion Indices for Existing Scenario and Post-Development Scenario without Control
We will compare the three erosion indices: Time of Exceedance, Cumulative Erosion Index and Cumulative Effective Work Index, for existing scenario and post-development scenario without control. VO uses the results of one pre-development scenario to calculate…
Step 7: Create Chicago, SCS Type II and AES Design Storm based on IDF Group
Tutorials » Using Resource Library » Step 7: Create Chicago, SCS Type II and AES Design Storm based on IDF Group
Chicago, SCS Type II and AES design storms of each return period could be created based on an IDF Group. The total rainfall volume for each return period is based on the duration. To create these design storms, select the IDF Group created in previous steps, i.e. Test…
Step 1: Open a Saved Project
Tutorials » LIDs and Water Quality Single-Event Model » Step 1: Open a Saved Project
Open VO and then select File -> Open Project Navigate to the folder where you have saved this exercise. Open the the model “…/model/solution/Water Quality Model – Single-event.voprj”.
Working with a Continuous Model
Tutorials » Working with a Continuous Model
In this exercise, we will create a continuous VO model using a single-event model and then run the simulation with 10 years of climate data from Toronto Pearson Airport. This exercise covers the basic work flow in a continuous simulation. You will find that the…
Step 1: Open a Saved Project
Tutorials » LIDs and Water Quality Continuous Model » Step 1: Open a Saved Project
Open VO and then select File -> Open Project Navigate to the folder where you have saved this exercise. Open the the model “…model/solution/Water Quality Model – Continuous.voprj”.
Step 14: Size Ponds
Tutorials » Analyzing Erosion for New Development » Step 14: Size Ponds
We use 20 mm, 25 mm and 30 mm rains to size the pond. For example, the Rating Curve “20mm” is sized under 20 mm rain for the scenario “Post-20mm-detention”, and “20mm-10mmIA” is sized under 20 mm rain for the scenario…
6.6.8 Export Layer
User’s Manual » 6 Working with the Map » 6.6 Using GIS Tools » 6.6.8 Export Layer
Use Export Layer to directly export a layer as shapefile together with a CSV file. To use this tool: Expand the layer table of the Map and click on the layer that is to be exported. For example, in the figure below, the layer NasHyd is selected. Use either of the…
1.7.2 What’s New in Version 6.1
User’s Manual » 1 Introduction » 1.7 What’s New » 1.7.2 What’s New in Version 6.1
For Visual OTTHYMO 6.1 (VO) we have added scenario comparison to single-event and continuous models., upgraded continuous modeling by including GIS tool and hydrograph commands of ScsHyd and NasHyd, improved LID package, expanded the data exporting/importing function…
Step 11: Set Parameters for Rain Garden
Tutorials » LIDs and Water Quality Single-Event Model » Step 11: Set Parameters for Rain Garden
Rain Garden in VO does not have an option for entering a underdrain or outflow structure. If these are included in your design, you should use the Bioretention command. The only runoff leaving a Rain Garden is the overflow. 1. Calculate the required total volume The…
3 SWM Pond Modeling
Reference Guide » 3 SWM Pond Modeling
Probably the single biggest use for Visual OTTHYMO is to help create water resources strategies whereby stormwater management ponds are implemented to address issues of water quality control, erosion control, and water quantity (i.e. flooding) control. Visual OTTHYMO…
FAQ
FAQ
Q: Which files should I send for reporting a ticket? A: When reporting an issue, you can send an email to support@smartcitywater.ca by including the following information. Please denote your software version and build numbers. You can find them by clicking the…
9.1 Overview of Output Features
User’s Manual » 9 Working with Output » 9.1 Overview of Output Features
Different outputs are available for single-event simulation and continuous simulation. Hydrograph is the main output from single-event simulation. The hydrograph is for only one event covering a few hours or days. VO provides five (5) different ways to view the…
4.1.1 Project Types
User’s Manual » 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…
6.3.9 Defining Layer Symbol
User’s Manual » 6 Working with the Map » 6.3 Using Layers » 6.3.9 Defining Layer Symbol
The appearance of features on the map are defined using symbols. For an empty project, a default symbol is generated for each layer. To change the symbol: Select the Layer Properties menu from layer context menu or click Layer Properties button from GIS toolbar. The…
I’m running a VO model with a DIVERT HYD command, and the output to each outlet does not match the input flow table.
FAQ » I’m running a VO model with a DIVERT HYD command, and the output to each outlet does not match the input flow table.
I’m running a VO model with a DIVERT HYD command, and the output to each outlet does not match the input flow table. In this case, QPEAK is 7.01. So, the QPEAK is between 6.18 and 9.33 in the Total column. By interpolation for Flow 1 and Flow 2 (DIVERTHYD),…
Currently, I am developing a continuous model. I want to assign the LU to each catchment; but the classifications are Open Land, Grass Land, Light Forest, Heavy Forest, and Crops up to shoulder height. Could you please tell me where exactly this LU is use
FAQ » Currently, I am developing a continuous model. I want to assign the LU to each catchment; but the classifications are Open Land, Grass Land, Light Forest, Heavy Forest, and Crops up to shoulder height. Could you please tell me where exactly this LU is use
Land Use is generally used for: a. Water quality purposes and b. Runoff purposes (to calculate Curve Number (also known as CN) when the SCS equation is used). Water Quality purposes: For any hydrograph commands (e.g., StandHyd, NasHyd, etc.), at the bottom of the…
9.3 Continuous Simulation Outputs
User’s Manual » 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 12: Set Parameters for Route Reservoir
Tutorials » LIDs and Water Quality Single-Event Model » Step 12: Set Parameters for Route Reservoir
Finally, we will set up our Route Reservoir command. The reservoir in this model represents a dry pond with an emergency overflow. The Route Reservoir goes downstream of the AddHyd – 29. Users can choose to check off or the Overflow. Without the overflow option…
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”…
Step 10: Set Parameters for Filter
Tutorials » LIDs and Water Quality Single-Event Model » Step 10: Set Parameters for Filter
Now we will enter parameters for the Filter, which can be used to represent any mechanical water quality treatment which does not provide flow attenuation. Filters in VO have two outputs, i.e. overflow (i.e. bypass) shown as a red arrow and treated flow shown as a…
2.11 Viewing Continuous Simulation Outputs
User’s Manual » 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…
9.3.3.3 Plot Calibration
User’s Manual » 9 Working with Output » 9.3 Continuous Simulation Outputs » 9.3.3 Time Series Plot » 9.3.3.3 Plot Calibration
Similar to the single-event simulation, it is important to compare the observed and simulated time-series data for model calibration. For file format, please refer to 10.3 Calibration Files. As there are more than one time-series data available, it is necessary to…
Step 5: Run the Simulation for Pre-development Scenario
Tutorials » LIDs and Water Quality Single-Event Model » Step 5: Run the Simulation for Pre-development Scenario
Once you have entered all the land use data for your NasHyd commands, save your model and run the simulation. Select Run from the Simulation toolbar and you will see the following window. Under the dropdown menu for water quality select “New WaterQuality” for each…