QGIS ReFH2 to TUFLOW: Difference between revisions
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==ReFH2 Licensing==
In order to use the tool, ReFH2 Version 2.27059.19021 or later, must be installed on the local machine which can be downloaded from the following link (https://www.hydrosolutions.co.uk/software/refh-2/refh2_download/). The ReFH2 software requires the relevant local licence
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===Event Selection===
Once the relevant location specific data has been input, then the user should first pick the ReFH2 model that they would like to use. The 'legacy' 2.2 and newer 2.3 ReFH2 models are available. In order to use the ReFH2.3 model ReFH2.3+ descriptor files, containing a new BFIHOST19 parameter, are required. If ReFH2.2 parameters are used with the ReFH2.3 engine, an error message will be flagged. The latest Catchment Descriptors contain information for the 2022 DDF model as well as the 2013 DDF model. The 2022 DDF model is recommended by CEH. However, the 2022 DDF parameters cannot be used with the legacy 2.2 ReFH2 model. Both 2013 and 2022 DDF parameters can be used with the 2.3 ReFH2 model by specifying the desired option in the FEH Rainfall model section. The default options are to use the 2022 DDF model witht he 2.3 ReFH2 model.
Once the ReFH2 engine version is selected, the user is then required to pick the events that they are interested in. The user can select from a number of pre-determined return periods or specify their own. All return period boundary conditions will be output in a single csv file for use as a TUFLOW boundary condition.
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The event name will be that which will need be specified in the batch file when using TUFLOW event files.
Finally, if the option to ‘Output to TUFLOW’ GIS is selected, then a GIS file in the correct TUFLOW boundary format containing the point, line or region will be created.
These files can then be merged together by the user where multiple boundary conditions are required in the model domain
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