Project identification

This section identifies the name and type of the project (Figure 2). The project name should be filled on Project_Name. Model_2_config option identifies what type of project it is. If the SWAT model was set up in the QSWAT+ and SWAT+ Editor GUIs and the user wants to retrieve a config and dataset that will reproduce that model, the Model_2_config option should be set to True. To go from config and data to a SWAT+ model, set this option to False.

File names

In this section, all files that are to be used in the model setup are listed. This includes the names of the soil, land use and DEM raster files present in rasters directory (Figure 1). Note that file names should include file extensions if rasters are not in grid (commonly used with ArcGIS) format, as shown in Figure 2. Lookup files contain the soil type or land use classes represented by the values in the soil and land use raster files. The lookup files are contained in the tables’ directory (Figure 1) and should be listed in the Soil_Lookup and Landuse_Lookup lines for soil lookup file and land use lookup file respectively.

Figure 2: Project identification and file names sections in config.py

Database table file for soil properties (usersoil file) should be specified in the on the Usersoil variable as demonstrated in Figure 2. You should also list the name of the file that contains locations where outlets should be created within the model in the Outlet line under Shape Files section.

Project Options

For watershed delineation, you need to specify the channel and stream delineation thresholds using the Channel_Threshold and Stream_Threshold variables respectively. The maximum distance for snapping outlets to streams should also be entered in metres in the OUT_Snap_Threshold line under the Watershed Delineation section (Figure 3).

Figure 3: Project options section in config.py