...
Figure 1. Catchments scenario setup process
If some data or parameter values are unavailable whilst creating the scenario, skip the step by clicking Next. Once you have created a scenario, you can make changes using the choices on the Edit menu.
...
| Info | ||
|---|---|---|
| ||
| Note: Most of the windows appearing in the wizard are identical to the related Edit menu choices. For steps that are related to rainfall runoff, constituent generation and filter models and have screen output similar to the wizard, refer to the Constituents and Rainfall runoff models chapters. |
Welcome screen (Step 1)
...
Figure 3. Recording Manager, View Catchment Areal
To use the Draw Network method:
...
Additional buttons under Load Sub-catchment Map assist you in adding further detail to the network map. Load Gauge Map and Load Background Maps allow you to upload a shape file of gauges or an image like a stream flow map to assist in drawing the node-link network. Add Links from Shp file allows you to load a shape file of links that is then mapped to the sub-catchment map automatically.
| Info | ||
|---|---|---|
| ||
| Note: If all the sub-catchments have not been connected, they will be shaded in blue. All sub-catchments must be connected by links before you can click Next (Figure 5). |
...
You can also add constituents after a scenario is set up using Edit » Constituents, which opens the Configure Constiuents dialog (Figure) Configure Constituents dialog. Refer to Defining constituents for more detail. To add a constituent, type its abbreviation in the Name field and either click Add or press the carriage return. To remove a constituent, highlight it and click Delete.
...
Figure 6. Manually adding functional units
The default method of defining FUs is manually. To add a FU, type it in the Name field, and either click Add or press carriage return. To remove a FU, highlight it and click Delete.
...
- Choose Manual Area Allocation from the Available Methods drop-down menu;
- For each sub-catchment, enter the area that is allocated to each FU. You can specify this as an absolute value in the Area (ha) column, or as a percentage in the Area (%) column; and
- You may enter the areas individually, or use the Apply-to options to fill multiple cells at once. This is explained in detail in the Using the Apply-to options section. You can also copy values from one cell and paste into other cells. Right-click on the source cell (the one you want to copy) and choose Copy. Then, right-click on the target cell, and choose Paste. The resulting table is shown in Figure 8.
Figure 8. Assign areas to functional units
When assigning FU areas manually using the Map tab, you can view the entire catchment and its outlines. FU areas can be assigned as follows:
...
If the areal percentages per sub-catchment, do not sum to 100%, the percentage cell turns pale red (to indicate an error) for that sub-catchment. In Figure 89, SC # 1 (Urban FU), the area percentage should be 50, not 5. The error applies only to SC#1, so the cell for SC#2 is not pale red.
Figure
89. Example of incorrect area values (SC#1)
Figure 810 shows the correct areal percentages for SC#1.
Figure
810. Example of correct area values (SC#1)
You can assign areas to multiple FUs simultaneously, using the Apply-to options on the right of the screen. This is useful when you have a large number of sub-catchments, each containing several FUs.
...
- Click Load to upload a raster file;
- If the land use map does not include a mapping of grid code to land use, click Assign Mapping;
- In the resulting window, assign a FU to each grid code using the drop-down menu in the FU column (Figure 911); and
- Click OK to close the Match FU Definitions to Raster window.
For each sub-catchment, the FU areas MUST add to 100% (+/- 0.1%). If areas do not sum to 100%, cells in the Area column will be shaded pale red. An exclamation mark will also appear on the left side of the first column.
Figure
911. Assigning FU areas using a land use raster
Rainfall runoff models (Steps 7-9)
The next 3 steps involve configuring the rainfall runoff models for every FU/sub-catchment combination. Refer to Assign rainfall runoff models for details on completing these steps. Click Next or Back to navigate between them.
...
You now assign a filter model for each FU/sub-catchment//constituent combination. Filtering models represent for example, the effects of riparian filter strips, artificial wetlands, farm dams and similar management treatments. Fluxes from each FU can be passed through separate "filters". Refer to Configuring filter models for more details.
...
Designate a meaningful parameter set name to make it easier to select appropriate parameter sets when testing alternate scenarios. |
Assign catchment models (Step 14)
...
Just as FUs are assigned models in sub-catchments, you must also assign models to links (Figure 10). In this step, you assign each link a routing model. You can also assign an in-stream processing model for every defined constituent.
Figure 10. Assigning link models
To assign a routing model to a link, click on the link and choose a routing model from the routing model drop-down menu. You can use the Apply-to options to apply the same link model to other links in the network. Figure 10 shows the available routing and in-stream processing models. To assign in-stream processing models to the links, click on the desired link, and choose the appropriate model from the drop-down menu in the Model column. Click Edit... to configure parameters for each of storage routing only. Lag routing will need to be parameterised at the next step.
For details on the available routing and in-stream processing models, see the Source Scientific Reference Guide. The items in the contextual menu have the same function as that described in the network definition step.
Click Apply To All to apply the configured settings to all links.
To check which model has been assigned to a link, click on the link. The link model will be displayed in the Routing model pull-down list. Click Next when the desired models have been assigned to all links.
Parameterise link models (Step 15)
To assign parameter sets to link models, select the link that was assigned a model in the previous step. Then, using the Parameters drop down list, follow the same process used for rainfall runoff and constituent generation models to generate parameter sets (Figure 143).
Figure 143. Parameterising link models
Designate a meaningful parameter set name to make it easier to select appropriate parameter sets when testing alternate scenarios. |
Repeat the above for in-stream processing models.
Assign catchment models (Step 16)
This functionality is yet to be documented, if you would like assistance please call 1300-5-WATER (1300-592-837). Relevant to GWLag Plugin.
...
.
This step allows you to assign models to an entire catchments. It generally applies to catchments that model, for example, groundwater (for the GWLag Plugin).
Assigning nodes and links
The default node type in Source is a confluence node, where the inputs to the node are the upstream sub-catchment outlets, and the output from the node is the current sub-catchment outlet. Similarly, straight through routing is the default link type in Source. To change the node model or link type, right click on the confluence node in the Geographic Editor, then choose Change Node Model or the link type respectively, from the contextual menu. This For nodes, this lists all the model types available. Choose the required model.
| Anchor | ||||
|---|---|---|---|---|
|
This technique can be replicated for other Apply-to options available in the wizard. It can be used to:
- Assign a single value to all FUs across all sub-catchments;
- Assign a single value to all FUs in a particular sub-catchment (eg 50% of the total area is assigned to each FUs in sub-catchment #9);
- Assign a single value to all FUs of a certain type (across all sub-catchments); or
- Re-allocate FU areas by value or percentage. For example, if you have already specified that 50% of each sub-catchment is of FU type "Forest", and 50% is of type "Urban", you could model increases in urban encroachment by specifying Auto-increase by 5%, all FUs of type "Urban" at the expense of all FUs of type "Forest". See Figure 14512.
Ensure that the percentage values for each sub-catchment sum to 100% prior to re-allocating FU areas.
Figure
14512. Automatically re-allocating FU area by percentage
Editing scenarios
Once a scenario has been created it can be edited using the Edit menu.
...
The Edit menu gives you access to all the elements of a scenario that can be modified. Refer to the Constituents and and Rainfall runoff models chapters for for further details.
| Info | ||
|---|---|---|
| ||
| Note: If the FU list and areas are modified, the models, parameters and climate input data associated with them (ie. rainfall runoff, constituent generation and filter models) will be modified as well. Check that any of these models, parameters and input data are assigned correctly. |