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1. Choose Tools » Climate Data Import Tool to open the dialog (shown in Figure 1);

2. Choose the climate data type you want to import from the Element drop down menu. You can import different climate data file formats for rainfall and PET; 

   Note

   Run the pre-processor separately for each climate variable. This process ensures that one time-series does not overwrite the other. Also, when organising climate data into folders, make the folders as specific as possible. For example, if you only want to load one year of data (and data is in a sub-folder representing years), use the sub-folder for the year as the input folder. Likewise, try to split PET and rainfall files into different directories so the tool does not have to search all climate folders.

3. Choose the type of data file format you want to load into the project from the File format drop downmenudown menu. Click Select to load the root folder containing the data files. (eg. C:\data\Silo\asciigrid);
4. If importing ASCIIGriddata ASCIIGrid data files, define the search pattern (click the Search Pattern button). This informs the pre-processor of the last characters and extension of the climate data file name to be read. If the available search patterns offered are not suitable, you can edit thedrop the drop down menu by clicking in the text box and specifying the appropriate search pattern;
5. Selecting Extend data sources? will include new data rather than clearing all existing data. This is only relevant for SILO data.
6. If importing ASCIIGriddata files, click Select to define a prototype raster, which should be *_rai.txt for rainfall and *_mwet.txt for PET files. For example, if a file is named 20070101_rai.txt, then the search pattern will be *_rai.txt. If a different file format is used, this step can be skipped;
7. Specify Units. The ‘Units’ refers to the units of the data inside the grid e.g. rainfall and PET are most likely to be in millimetres. These units are applied to the data time series which are generated for each catchment.
8. and the Cell Size; The ‘Cell Size’ is the cell size of the Subcatchment Raster (grid) which was input during the first step of creating catchments for the model. This raster will have been in projected coordinates and will most likely have a cell size in metres.
9. Specify the Projection Information - this is the projection which the pre-processor assumes the sub-catchment map uses. Note that for importing ASCIIGrid files the projection of the DEM or sub-catchment map can be one of three (as shown in Figure 1). Click the ProjectionProjection drop down menu; 
10. Specify the Modelling Period (the time period over which you want to import) - the Start date and End date. Clicking on these dates opens the date picker;
11. Once all data has been entered, click Apply. A progress bar appears indicating that data is being imported. This process can take several minutes depending on the amount of climate data present; and
12. Once loading is complete, the output of this tool can now be used as a data source in the Data Sources Explorer as shown in Figure 2.

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