QGIS ReFH2 to TUFLOW: Difference between revisions

FEH2022 is the most up-to-date Depth Duration Frequency (DDF) model for generating design rainfall hyetographs. CEH recommend the use of FEH2022, which supersedes the FEH2013 DDF model and therefore the 1999 method . In order to generate the design rainfall, the user obtains FEH2022 design rainfall depths from the FEH Web Service at https://fehweb.ceh.ac.uk for pre-defined return period/duration combinations. This requires a log on and user credits to purchase the data for the desired location. Data is available at a river catchment scale and as a point value. Both of these provide XML containing the rainfall depths. This is then imported into the ReFH2 software to generate hyetographs based on Flood Studies Report (FSR)/FEH approaches. The current version of ReFH2 (2.3) model supports use of both the 2013 and 2022 DDF models. Version 2.2 only supports the 2013 DDF model, an error message will be generated should the user try to use the 2022 DDF rainfall with the 2.2 ReFH2 model.