Search
Related topics are listed below.
Step 16: Run Long-Term Simulation for Control Scenarios
Tutorials » Analyzing Erosion for New Development » Step 16: Run Long-Term Simulation for Control Scenarios
Open each control scenario in the Schematic view. Click the Run button located at the Simulation tab. In the opened Batch Run window, add a run “long-term” and make sure that your setting is as below and the simulation Time Step is 60 min. You can use…
Step 7: Run Long-Term Simulation for Existing Scenario
Tutorials » Analyzing Erosion for New Development » Step 7: Run Long-Term Simulation for Existing Scenario
Stay at the Existing scenario. Click again the Run button located at the Simulation tab. In the opened Batch Run window, add another run “long-term” and make sure that your setting is as below and uncheck the run “Calibration” that is used…
Step 9: Run Long-Term Simulation for Post-Development Scenario without Control
Tutorials » Analyzing Erosion for New Development » Step 9: Run Long-Term Simulation for Post-Development Scenario without Control
Click on the Post tab to view the Schematic view of the Post scenario. Click the Run button located at the Simulation tab. In the opened Batch Run window, add a run “long-term” and make sure that your setting is as below and the simulation Time Step is…
Step 14: Run Long-Term Simulations
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 14: Run Long-Term Simulations
Run simulation for each scenario. Run simulation for the scenario of existing conditions Click on the scenario “Existing” tab on the Schematic view. This will display the layout of “Existing” scenario on the Schematic view. Click the…
Step 13: Setup Climate Data for Long-Term Simulation
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 13: Setup Climate Data for Long-Term Simulation
Following the same procedure as in Step 6: Enter the Continuous Monitoring Data to add the climate data for long-term simulations. The data files can be found in the folder “…./data”. The CSV file name for each type of climate data is listed as…
Step 10: Run the Simulation
Tutorials » Creating a VO Model in Schematic View » Step 10: Run the Simulation
Click the Run button located at the Simulation ribbon to open the Batch Run window. Simulation runs can be created for different storms. A default simulation has been created to run the model with the default rain. We will use this default simulation to run the…
Step 8: Run Preliminary Simulation
Tutorials » LIDs and Water Quality Single-Event Model » Step 8: Run Preliminary Simulation
We need to run the model to get initial results for further setting parameters for LIDs. To Run the model, click the Run from the Simulation toolbar. Select the Water Quality file in the dropdown menu next to each run. Then select Run.
Step 2: Run Simulation for Pre-Development Conditions
Tutorials » LIDs and Water Quality Continuous Model » Step 2: Run Simulation for Pre-Development Conditions
By default the model should open with a scenario called “Pre-Dev. Solved”. If you have a different scenario open, find the scenario under the Drainage Network Scenarios group in the Project Manager. Double-click the scenario to open it in Schematic view. If…
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…
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…
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…
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
Step 3: Create Scenarios for Post-Development without Control
Tutorials » Analyzing Erosion for New Development » Step 3: Create Scenarios for Post-Development without Control
We will divide the original site of 20 ha into two subscatchments, one NasHyd of 12 ha and one StandHyd of 8 ha. Duplicate the scenario “Existing” by clicking the Duplicate button on the Project Manager. Rename the new scenario as “Post”.…
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 11: Create Post-Development Scenario without Control
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 11: Create Post-Development Scenario without Control
Click the scenario “Existing” under the Drainage Network Scenarios in the Project Manager. Then, click the Duplicate button on the Project Manager. Give a name “Post” for the duplicate scenario and uncheck Runs. We will remove the…
Step 11: View Outputs
Tutorials » Creating a VO Model in Schematic View » Step 11: View Outputs
A hydrograph is the main output in VO. It can be viewed by graph, table, summary text and label. Select the AddHyd located at the outlet on the Canvas. Notice that the buttons located at the Output section in the Simulation ribbon are enabled. All these buttons are…
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…
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.
11.2 Program Quits During Run Simulation
User’s Manual » 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 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 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…
Step 2: Open the Pre-development Scenarios
Tutorials » LIDs and Water Quality Single-Event Model » Step 2: Open the Pre-development Scenarios
The model should open with a scenario called “Pre-Dev. Initial”. If you have a different scenario open, complete the following steps: 1. Open the Project Manager window. 2. If the Project Manager window is open but not showing, it may be hidden behind…
Step 13: Run the LID Model
Tutorials » LIDs and Water Quality Single-Event Model » Step 13: Run the LID Model
Click the Run from the Simulation toolbar. Then select Run.
4.2 Scenarios
User’s Manual » 4 Working Projects and Scenarios » 4.2 Scenarios
In VO, a scenario is an independent drainage network. It includes all hydrological objects and the links between them. It can be displayed in Map View and Schematic View. All scenarios are listed in Project Manager.
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 15: Import the Post-Development Scenarios with Control to the Continuous Project
Tutorials » Analyzing Erosion for New Development » Step 15: Import the Post-Development Scenarios with Control to the Continuous Project
We will go back to the continuous project to evaluate the long-term impact. 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 all…
Step 13: Run Simulations with Design Storms
Tutorials » Analyzing Erosion for New Development » Step 13: Run Simulations with Design Storms
For each of the scenario, create runs on the Batch Run window as below and then click Run button to finish the runs. Scenario Name Design Storm Used for Runs Existing 20mm, 25mm, 30mm Post 20mm, 25mm, 30mm …
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…
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
User’s Manual » 8 Running a Simulation » 8.3 Continuous Simulation
This chapter introduces how to set and run a continuous model.
11 Troubleshooting
User’s Manual » 11 Troubleshooting
This Chapter is written to aid users in resolving some of the simpler problems, warning messages, and error messages that might arise when using the model. These problems or messages may be attributed to invalid input, using the model for situations where it was not…
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…
Step 12: Create Post-Development Scenario with Control
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 12: Create Post-Development Scenario with Control
Click the scenario “Post” under the Drainage Network Scenarios in the Project Manager. Then, click the Duplicate button on the Project Manager. Give a name “Post Mit” for the duplicate scenario. Modify the model layout of scenario…
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
User’s Manual » 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
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…
8.3.1 Setting Simulation Engine
User’s Manual » 8 Running a Simulation » 8.3 Continuous Simulation » 8.3.1 Setting Simulation Engine
Continuous simulation has global and command-specific parameters. To change global parameters, click the Engine Options button in Simulation tab. The Simulation Engine window will appear. In the Simulation Engine window, the parameters are grouped to four (4)…
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 3: Create StandHyd for Urban Catchment
Tutorials » Creating a VO Model in Schematic View » Step 3: Create StandHyd for Urban Catchment
Navigate to the Tool Box, which is the left-side bar on the screen in the default setting, select StandHyd and drag it to the desired location (somewhere in sub-catchment 1003 in this case) on the canvas and release it. A new StandHyd will be created in the given…
Step 4: Create NasHyd for Rural Catchment
Tutorials » Creating a VO Model in Schematic View » Step 4: Create NasHyd for Rural Catchment
Use the same method to create the three NasHyds. Select the NasHyd in the tool box as shown below. Rename them as 1001, 1002 and 1004. Spend time to explore the parameters of NasHyd and see what are the differences as compared to StandHyd. After this step, the…
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…
Step 9: Set Parameters for Bioretention Tank
Tutorials » LIDs and Water Quality Single-Event Model » Step 9: Set Parameters for Bioretention Tank
The sizing of Bioretention is based on the Sustainable Technologies Evaluation Program (STEP) recommendations. Default parameters from VO are used except the followings: Surface Ponding Layer: Depth – Area Curve: Mulch Layer: Depth is 0.075…
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…
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…
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…
9.2 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 5: Create another Sub Group for IDF
Tutorials » Using Resource Library » Step 5: Create another Sub Group for IDF
We will then add IDF data and create design storms based on that. To add a Sub Group, follow the steps in Step 3 and rename it as “IDF”.
Step 4: Assign Land Use for Hydrograph Commands
Tutorials » LIDs and Water Quality Single-Event Model » Step 4: Assign Land Use for Hydrograph Commands
Select the NasHyd command “Farm Field 1” and open the Properties menu. At the bottom of the Properties menu there is a heading for Water Quality. Select the button next the LandUse field and you will see a window with a list of land uses which match those…
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…
Step 8: Analyze Erosion Indices for Existing Scenario
Tutorials » Analyzing Erosion for New Development » Step 8: Analyze Erosion Indices for Existing Scenario
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 3: Create NasHyd for the rural subcatchment
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 3: Create NasHyd for the rural subcatchment
Select NasHyd command under the Hydgrographs section in the Tool Box. Drag and drop the NasHyd command from the Tool Box to to the desire location (somewhere in the subcatchment) on the Schematic view. A new NasHyd will be created in the given location. Click…
Step 5: Set Parameters for the New Catchments
Tutorials » Sizing a Pond Using the Route Reservoir Command » Step 5: Set Parameters for the New Catchments
The original NasHyd 1002 has been split into two catchments. One part remains as NasHyd 1002 and the other part represents the pond area named as StandHyd 1006. Therefore, the area of NasHyd 1002 under the pre-development conditions should be smaller than that under…
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 3: Create a Sub Group for STM Files
Tutorials » Using Resource Library » Step 3: Create a Sub Group for STM Files
In this step, we will create a Sub Group under the Test group and add design storms from STM files. Create a Sub Group by either of the two ways: 1) click the Sub Group button in the toolbar 2) right click the group where we want to include a Sub Group, i.e.…
Step 3: Create a Scenario for Post-development Conditions
Tutorials » Sizing a Pond Using the Route Reservoir Command » Step 3: Create a Scenario for Post-development Conditions
1. Duplicate the scenario of “Existing Conditions” In the Project Manager window, under Drainage Network Scenarios, select the “Existing Conditions” scenario and then duplicate the scenario by either of the following two ways: 1) right click to…
Step 2: Create a Scenario for the Existing Conditions
Tutorials » Analyzing Erosion for New Development » Step 2: Create a Scenario for the Existing Conditions
In the Project Manager, rename the Scenario1 as “Existing”. We will use this scenario to create a scenario for existing conditions. To rename the scenario, click on the scenario, then right click to open context menu and select Rename from the context…
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…
Step 6: Create RouteChannel
Tutorials » Creating a VO Model in Schematic View » Step 6: Create RouteChannel
StandHyd and NasHyd generate hydrographs. These hydrographs are then passed through channels by RouteChannel to the downstream. To create a RouteChannel, select RouteChannel in the Tool Box and drag-and-drop it to the Canvas. Put it on the channels it will simulate.…
Step 6: View Results
Tutorials » Working with a Continuous Model » Step 6: View Results
The outputs are available in time series and summary format. The time series can be viewed by selecting a command and using the Hydrograph, Plot Results, and Plot Calibration tools. The summary outputs are available in the Water Balance table. The Hydrograph tool…
Step 10: View Results
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 10: View Results
To view results, one or more commands needs to be selected first. Hydrograph Select the NasHyd on the Schematic view. Then, click Hydrograph button under the Simulation tab to view the results. Hydrograph button give the hydrograph graph versus the rain fall data.…
Step 15: Analyze Hydroperiod
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 15: Analyze Hydroperiod
VO uses the results of one pre-development scenario to calculate the confidence interval for hydroperiod analysis. Therefore, before doing the hydroperiod analysis, we should select one scenario from all the scenarios in the project as the Pre-Development Scenario. To…
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…
Step 8: Calculate CN
Tutorials » Creating a VO model with Existing GIS Data » Step 8: Calculate CN
Now, the model structure has been created. All parameter values except NasHyd area and RouteChannel length are using default values. GIS layers can help determine some parameter values. In this example, the soil layer and the land use layer will be used to estimate the…
Step 6: Setup Symbols
Tutorials » Creating a VO model with Existing GIS Data » Step 6: Setup Symbols
You may also want to change the layer symbols to increase the contrast between them. Select the layer in map tree and then right click the mouse to open the context menu. Select Layer Properties in the context menu. In the Layer Properties window, click the symbol…
4.3 Importing Scenarios from Model Data Files
User’s Manual » 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.
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 2: Add a Background
Tutorials » Creating a VO Model in Schematic View » Step 2: Add a Background
It’s good to have a watershed layout reference when creating the model schematic. VO has the ability to add a picture as the background in the Canvas. A picture is provided for this exercise in the training package located at …\data\Background.JPG. We will use…
Step 5: Label Hydrologic Objects
Tutorials » Creating a VO Model in Schematic View » Step 5: Label Hydrologic Objects
Choose the five hydrologic objects by drawing a rectangle on the Canvas. Right click and select Set labels … to open the Label Editor window as shown below. The window lists all available properties that could be added as a label. Notice that some of them are…
Step 1: Open Climate Library
Tutorials » Using Resource Library » Step 1: Open Climate Library
The Resource Library is under the Simulation toolbar on the top.
Step 6: Create IDF Group
Tutorials » Using Resource Library » Step 6: Create IDF Group
IDF data includes the rainfall intensity for various return periods. In Resource Library, the rainfall intensities of a certain return period are represented as an IDF Curve. A group of IDF Curves of different return periods is an IDF Group. Each IDF Curve could be…
Step 7: Add LID Commands
Tutorials » LIDs and Water Quality Single-Event Model » Step 7: Add LID Commands
For this exercise we will be adding a Rain Garden, Filter, and Pond as a treatment train. It should be noted that the rain garden is modeled as a lumped LID to avoid having too many commands in the model. This is done by adding up the storage in all the rain gardens in…
Step 6: Size the pond
Tutorials » Sizing a Pond Using the Route Reservoir Command » Step 6: Size the pond
The Route Reservoir command uses a Discharge-Storage Rating Curve to represent flows out of the pond and storage within the pond. The general idea of pond sizing is to adjust this rating curve so that the requirement on target flow control can be satisified. In this…
Step 2: Add a Background
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 2: Add a Background
It’s good to have a watershed layout to reference when creating the model schematic. VO has the ability to add a picture in the background of the Schematic view. A picture is provided for this exercise in the training package. To set the background, right-click on…
Step 9: Setup Model Calibration
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 9: Setup Model Calibration
In order to calibrate the wetland, a gauge must be assigned to the RouteWetland Command. This can be done by right clicking the RouteWetland and selecting Has Gauge Here. Then click the Plot Calibration button in the Simulation ribbon. This will open the…
Step 4: Adjust Schematic Layout
Tutorials » Sizing a Pond Using the Route Reservoir Command » Step 4: Adjust Schematic Layout
Convert hydrograph commands for developed areas to StandHyds. Right click on NasHyd 1003 and select convert to StandHyd. Repeat for NasHyd 1005. You will see the NasHyd commands are changed to NasHyd commands. Delete the link from StandHyd 1003 to RouteChannel…
Step 2: Add GIS layers
Tutorials » Creating a VO model with Existing GIS Data » Step 2: Add GIS layers
Open the Add Layer tool in GIS ribbon. In the popped-up window, select all the shapefiles in the GIS data folder. After importing, the added layers will be displayed in the map tree on the left. Right click on any imported layer and select Zoom to Layer to see the…
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 9: Check the Default Hyetograph
Tutorials » Creating a VO Model in Schematic View » Step 9: Check the Default Hyetograph
A default hyetograph has been created in the model. It’s a Chicago design storm lasting for four hours and with total rainfall volume of 78mm. Navigate to Project Manager and double-click the “1-default_Chicago” to open the Storm Viewer window to see the details.…
Step 2: Create a Top Group
Tutorials » Using Resource Library » Step 2: Create a Top Group
Group works like folders. The Top Group is in the top level and the Sub Group is inside another group. The climate library items could be organized properly with these groups. Create a top group by either of the two ways: 1) click the Top Group button in the toolbar;…
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”.
Step 14: Display Results by Labels
Tutorials » LIDs and Water Quality Single-Event Model » Step 14: Display Results by Labels
1. Select all the commands on the canvas 2. Right click to open context menu and click Set Labels… 3. Select the labels to be displayed from Available Properties window. Hold Ctrl for multiple selection. Drag the selected properties from Available…
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.
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 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.
Step 8: Add Design Storms to Model
Tutorials » Using Resource Library » Step 8: Add Design Storms to Model
We will add the design storms created in previous steps to the model. To do that, navigate to Test -> STM group in Library Explorer, right click STM group to open the context menu and choose Add All Design Storms to Project menu. An information window will appear as…
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…
Step 15: Compare Results by Scenario Comparison
Tutorials » LIDs and Water Quality Single-Event Model » Step 15: Compare Results by Scenario Comparison
Click the Scenario Comparison button in the Simulation toolbar. Select the Design Storm, Scenario and Commands to be compared. The chart will compare the corresponding runoff flow. For example, the figure below compares the runoff at AddHyd – 9, which is the…
Step 7: Enter the Continuous Monitoring Data
Tutorials » Modeling a Wetland: Continuous Simulation, Calibration and Hydroperiod Analysis » Step 7: Enter the Continuous Monitoring Data
The precipitation, temperature, evapotranspiration, and groundwater data can be added to the model. Those climate data will first be added to the Resource Library and then added from Resource Library to Project Manager. Click Project Manager tab, so later on we can…
Step 3: Create NasHyds with Catchment Layer
Tutorials » Creating a VO model with Existing GIS Data » Step 3: Create NasHyds with Catchment Layer
For easy selection of objects on the catchment layers, keep the catchment layer selected and highlighted and hide the other imported layers. Use mouse left click for single selection. Use ctrl + mouse left click for multiple selection. The selected objects will be…
Step 4: Create RouteChannel with Stream Layer
Tutorials » Creating a VO model with Existing GIS Data » Step 4: Create RouteChannel with Stream Layer
Turn on the stream layer and turn off other layers on top of the stream layer. Use ctrl + mouse left key to select all the three streams. The selected streams will be highlighted in red. Right click the mouse to open the context menu and select RouteChannel in…
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 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 4: Add Design Storms from STM Files
Tutorials » Using Resource Library » Step 4: Add Design Storms from STM Files
The STM files could be added to Resource Library as a Read-in design storm. To read from STM files, select the Sub Group created in previous step, i.e. “STM” in this exercise, right click to open context menu and choose Add New Design Storm – From…
Step 5: Add Rain Data From Resource Library
Tutorials » Analyzing Erosion for New Development » Step 5: Add Rain Data From Resource Library
Click the Resource Library button in the Simulation toolbar. Add a new Top Group in the Library Explorer of the Resource Library window and name it as “Erosion-training”. Then, we should add rain data for calibration and long-term simulation. To add…
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…
Step 12: Add Rain Data Using Resource Library
Tutorials » Analyzing Erosion for New Development » Step 12: Add Rain Data Using Resource Library
Click the Resource Library button in the Simulation toolbar. Navigate to the Top Group folder “Erosion-training” that was created previously for continuous model. We will add design storm to the same Top Group folder. To add rain data, click on the…
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…