You can edit the properties of the source node by:
- Double-clicking the left mouse button over the source node icon; or
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You can click on any tab and can edit any of the data presented in the active dialogue box. The Source Tab contains 3 options: Generate,
- Generate: default option which generates both runoff and contaminants based on the provided parameters
- Custom Flow and Generate Contaminants
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- : this allows you to import flow time series data, resulting in the stochastic generation of constituents
- Custom Flow and Contaminants
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- : this allows you to import time series data of total runoff and associated contaminants
Generate
Generate is a default option which will create both runoff and contaminants based on the various parameters. This Tab contains Land Use/Zoning type, the total area, and the percentage of impervious and pervious area for that source node. It also contains the hydrologic parameters used by the rainfall-runoff model. For more information on model structure, operation and suggested parameter ranges see Rainfall Runoff Modelling.
Land Use/Zoning Type
For source nodes, select the zoning or surface type. This will change the water quality parameters used in the generation of pollutants from the source node to values appropriate for that zoning or surface type. See below for more details.
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The area information forms part of the input to MUSIC’s rainfall runoff model, derived from a model developed by the CRC for Catchment Hydrology (Chiew & McMahon, 1997). For a diagram of the model structure and a brief description of its operation, see Appendix A : - Rainfall-Runoff Modelling. Further guidance on setting appropriate parameters for the rainfall runoff model is contained in the Appendices, especially for parameters specific to particular regions.
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Each component of runoff is calculated using the information above and a daily time-step. Each component is then disaggregated to the required time-step, using the detailed rainfall pattern and a technique appropriate to that component. For more information on disaggregation see Appendix A : - Rainfall-Runoff Modelling.
Water Quality Parameter Dialogue Boxes
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Custom Flow and Generate Contaminants options option as shown in the figure below allows you to import flow time series data, resulting in the stochastic generation of constituents.
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To create such node, you can choose Custom Flow and Contaminants options option in Source node which will allow you to import Total flow along with contaminant time series data as shown below:
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