Scenario Creation
A Source model consists of two parts - a project file and one or more scenarios. A project file is a wrapper for a collection of one or more scenarios. It identifies the project name, description, and any scenarios associated with the project. A scenario represents the major processes in a water resources system using Source's node-link framework.
An Urban Scenario is used to represent the urban water cycle networks (water supply, stormwater, wastewater), ranging in scale from a single allotment up to large clusters or small subdivisions.
Once the Urban Developer Plugin has been installed, Urban Scenarios can be created like other scenarios in the core Source framework. Refer to Projects and scenarios for details. Figure 1 shows the main user interface for an Urban Scenario.
Contents
| Table of Contents | ||||
|---|---|---|---|---|
|
Figure 1. The Urban Scenario main user interface.
Running a Scenario
Running a scenario is the Urban Developer process of applying observed time series inputs or drivers to the currently selected scenario.
After a scenario run, you can see the results in the Source Results Manager.
Before running a scenario, you must:
- Construct a model in the Urban Developer schematic editor using an appropriate configuration of nodes and links, and adjust node properties as required
- Configure the appropriate climate data, including rainfall.
- Use the Parameters area of the Source Project Explorer to select the outputs to record.
- Select the Simulation Type
The model can then be run through ‘Run’ button on the main Source toolbar.
Contents
Recording Model Outputs
After setting up a scenario, you then select the model outputs of interest.
When you run the models in a scenario, every node and link produces results in the form of predicted water flows, volumes and other data outputs specific to each node and link.
Some node or link types can produce many data outputs. You can change the outputs that Urban Developer records by default.
Urban Developer does not automatically record all possible outputs of all nodes and links. You must use the Parameters area of the Project Explorer to select the outputs to record.
In general, the more outputs you record, the longer the simulation will take, though this depends on exactly what you record: recording mass-balance is more computationally intensive than recording inflow, for example.
Urban Developer automatically saves the list of model outputs selected for recording into the project file, however Urban Developer does not automatically save the model run results themselves. You must save or export the model run results using the options in the Results Manager.
Errors and warnings
If the scenario run has any associated warnings or errors, these will be displayed in the Log Reporter.
Simulation Type
Urban Configuration
The Urban Configuration runs a single Urban Scenario.
Urban Combination Configuration
The Urban Combination simulation is designed to be used when linking Urban Developer with Source River System Scenarios.
The user configures a single Behavioural Water Use node to represent a typical household type (such as an apartment, or detached house with a rainwater tank). The Urban Combination simulation generates a database of the average water demand for every combination of occupancy and end usage type defined in the scenario.
To use the Urban Combination Configuration:
- Exactly one behavioural demand node must be present in the model template (roof and tank nodes can also be present)
- Configure the urban scenario to represent a single dwelling at the demand node (this will be forced during run time anyway), tank and roof nodes if present.
- Disable Sampled Appliance and Occupancy
- Choose the Urban Combination Configuration
- Run the model.
The Urban Combination results will be available from within Source River System Scenarios within the same project and can be used to configure demand models with customised distributions and dwelling numbers.
Acknowledgements
This material has been adapted from:
eWater Cooperative Research Centre (2011) Urban Developer User Guide: Urban Developer v1.0.0, eWater Cooperative Research Centre, Canberra, 29 June 2011. ISBN 978-1-921543-40-1