QGIS ReFH2 to TUFLOW

Introduction

Originally published in 1999, and subject to continuous development, the Flood Estimation Handbook (FEH) comprises the standard methods for estimating flood frequency in the UK. The rainfall-runoff model is one of two core handbook methods. In 2015, the Centre of Ecology and Hydrology (CEH) and Wallingford Hydro Solutions (http://www.hydrosolutions.co.uk) released a new version of the Revitalised Flood Hydrograph 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 a rainfall-runoff model that takes inputs from the FEH2013 web service (https://fehweb.ceh.ac.uk) and generates design rainfall events and provides a method for calculating design runoff from sites or contributing subcatchments. For a full description of the approaches, the reader is referred to their guidance which can be freely accessed at:- https://www.hydrosolutions.co.uk/support/refh2_faq/refh2_literature/. The ReFH2 method is available within the ReFH2 software.