Flood Estimation Handbook

The Flood Estimation Handbook (FEH) gives guidance on estimating rainfall and river flood frequency in the UK and outlines methods for assessing the rarity of notable rainfalls or floods.

The FEH is the industry standard for estimating local flood risk and developing resilient infrastructure. Originally published in 1999 by the UK Centre for Ecology & Hydrology, it was reprinted in 2008 as a five-volume set.

The assessment methods outlined underpin the ReFH 2 and WINFAP 4 software products.

The FEH is an evolving programme of research. There have been important method updates since its first publication.

The descriptions of the latest version of the FEH statistical procedures for flood frequency estimation available through the WINFAP software are published in the Joint Defra / Environment Agency 2008 Science Report, ‘Improving the FEH Statistical Procedures for Flood Frequency Estimation’.

The restated FSR rainfall runoff model method has been superseded by the Revitalised Flood Hydrograph ReFH 2 software package. The original method background to ReFH is published within the FEH Supplementary Report No. 1 and latest method updates within the ReFH 2 Technical Guidance. The original FEH rainfall frequency models were also updated in 2013 with the new methods published by Stewart et al. (2013). These method updates can be freely downloaded from the hyperlinks.

The ReFH and WINFAP software products are supported by the UK CEH FEH Web Service which enables users to access catchment descriptor values and both the FEH 2013 and legacy 1999 rainfall estimation procedures for over four million sites across the UK.

The FEH Web Service was developed and is supported by ourselves on behalf of UK CEH. It is accessed via a range of pay per use pricing options.