Using ReFH2 to Generate TUFLOW Boundary Inputs: Difference between revisions

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In 2016, the Centre of Ecology and Hydrology (CEH) and Wallingford Hydro Solutions (http://www.hydrosolutions.co.uk) released another version of the revitalised rainfall-runoff model (ReFH2) which allows users to generate design flows and hydrographs from given rainfall events for both catchment and development sites. ReFH2 is the 2nd version of the “Revitalised Flood Handbook”, created and developed by Wallingford Hydro Solutions. It’s a rainfall-runoff model specifically applicable to England, Wales and parts of Scotland. It takes inputs from the FEH 2013 website and generates design rainfall events and provides a method for calculating design runoff from subcatchments.

For a full description of the approaches, the reader is referred to their document which can be freely accessed at:-

=ReFH2 Runoff=

ReFH2 is the new method for the calculation of runoff. It hasn’t changed significantly from the original ReFH approach for which equations are publicly available, although there has been a mass balance closure improvement to the runoff model. There has however, been a change to the initial conditions, BF0 and Cini (initial baseflow and initial soil moisture, C) and there is an additional parameter, alpha. The data contained in the XML from the FEH2013 website also provides the catchment descriptors to calculate the necessary model parameters within ReFH 2 from which the runoff hydrograph is developed.