...
Th PERFECT GWLag plugin allows you to model groundwater and its interactions in a sub-catchment. Ensure that the following file has been loaded to into the Plugin manager prior to creating a new GWLag project:
RiverSystem.Plugins.PerfectGWLag.dll
After installation, the next step involves creating a sub-catchments scenario with the Geographic Wizard for catchments, and configuring various parameters to model groundwater. Just as with any catchments scenario, use the wizard to Once the plugin has been loaded, using the Geographic Wizard, first create a standard set of sub-catchments to suit your study area and modelling requirements in Define the network (Step 3).Next, define , then configure the appropriate parameters to model groundwater.
GWLag network definition
In Step 3 of the Geographic wizard, load a DEM-based network and configure the outlets as appropriate (Figure 1).
Figure 1. Geographic Wizard, Network definition (GW-Lag)
List constituents and FUs
Next, list any constituents that you want to model (in step 4), followed by the functional units (FUs) in step 5 (Figure 2). Define the functional units using a shape file (refer to Specify functional units (Step 5) for details) and file and assign areas to them using a raster (Specify functional unit areas (Step 6)Figure 3). Figure 1 shows an example of this. The next section provides details on configuring rainfall runoff, constituent generation and filter models in Source.
Figure 1. Geographic Wizard - Assigning Functional Unit Areas
Figure 2. Geographic Wizard, Name FUs (GW-Lag)
Figure 3. Geographic Wizard, Assign areas to FUs
Defining and assigning models
You can then assign models to sub-catchments for rainfall runoff, constituent generation, and any filtering you wish to the subcatchments using the wizard Geographic Wizard or the options in the Edit menu (refer to Rainfall runoff models for details):
- Constituent generation – You As an example, you can add “Salt” as a constituent and assign the “Simple GW salt model”;
- Rainfall runoff – assign “PERFECT GWLag” as a model. To assign inputs, choose PERFECT GWLag model input assignment from the Available Methods drop down menu (Figure 2) and load the weather database you wish to use. Check Also check the following:
- the The station number from each FU (left hand column) match matches the station numbers on the right hand side (drop down lists, right hand columns). If they do not, the entry on the right hand side will be the closest text based match, not the closest geographic match. You can adjust the matches by selecting an alternate station from the drop down list of stations available in the loaded weather database;
- Note that the minimum and maximum dates will be displayed by default. To save memory you can either import the desired time period or import the entire range but run the model for a selected period. The latter is a more flexible option.
- Filter – Assign any filter model you wish from the drop down menu;
- Links – you can add a model to selected links and if flow routing or a storage model is required. Note that there is no link model specific to the Groundwater tools in Source; and
- Nodes – select FlowScaledLossModel from the Node models drop down list and click Add Model.
...
This section describes how to parameterise each of the assigned models. It requires the parameterisation of both plugin components – PERFECT and GWLag.
...
Choose PERFECT-GWLag model parameterisation from the Available Methods drop down list. The PERFECT and GWLag parameters are specified under separate tabs.
To parameterise PERFECT (as shown in Figure 3):
...