NRFA Peak Flow Dataset Version 11.1 released

The National River Flow Archive (NRFA) has released an update to the Peak Flow Dataset including the files for use in the WINFAP software for flood estimation.

The dataset includes the addition of FEH2022 DDF data, and there are two corrections:

  • Amendment to FEH Suitability at 26017 Ings Beck South Newbald from FEH Pooling to FEH QMED
  • Station re-numbering for 59003 Twrch at Gurnos (was previously 60017)

The dataset still contains Annual Maxima (AMAX) and Peaks over Threshold (POT) data for 939 gauging stations which have data to 30 September 2021 in England, Scotland, Wales and Northern Ireland.

Download Version 11.1 of the NRFA Peak Flow Dataset

The NRFA’s Peak Flow Dataset provides flood data for 939 river flow gauging stations across the UK. The data can be used with the flood estimation methods set out in the Flood Estimation Handbook (FEH), which is the industry standard for current flood estimation in the UK. The Peak Flow Dataset has been shown to provide net economic benefits of almost £5.4 million per year in terms of costs saved by environmental consultants and regulators.

The Peak Flow data provided through this service originate from gauging stations operated by a range of UK hydrometric Measuring Authorities as is the case with other NRFA data. Maintenance of the NRFA Peak Flow Dataset, including the latest update, is carried out under a collaborative project between the UK Centre for Ecology & Hydrology, the Environment Agency, Natural Resources Wales, Northern Ireland’s Department for Infrastructure – Rivers, and the Scottish Environment Protection Agency.

The updated NRFA Peak Flow Dataset (Version 11.1) was released on 6th March 2023 and reflects the NRFA data holdings at this time.

More information about the update can be found in the Version 11.1 release note.