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United Kingdom Historical Rainfall Digital Maps from 1866 to 1968 - Hydro-GIS

The British Rainfall Digital Archive (BRDA) was compiled in 2007-8 by Hydro-GIS Ltd as part of the NERC project with Oxford University, “Quantifying Flood Risk of Extreme Events using Density Forecasts based on a New Digital Archive and Weather Ensemble Predictions”. The BRDA is the most comprehensive resource on historical extreme rainfall in the UK, including

• over 28,000 observations of extreme rainfall back to the year 1866;

• over 1000 pages of text and eye-witness accounts describing the rainfall events and associated impacts such as flooding;

• over 250 rainfall maps and photographs.

For the Oasis data, the rainfall maps have been digitised and made available as raster data to provide the rainfall depths and extent in a useable format for further research and analysis.

This is the only digital source of historical extreme rainfall as a “rainfall footprint” in a useable GIS format. Over 200 maps are available in the dataset, including maps of the rainfall which produced some of the UK’s most extreme flood events such as the Norwich flood in 1912 and the Lynmouth flood in 1952. The BRDA is the most comprehensive digital archive of historic extreme rainfalls for the UK.

The data can be used for a variety of applications including: emergency planning - to test what would happen if these historical events were to occur today; strategic and site-specific flood risk assessments - to properly identify the flood risk by demonstrating historical events; the validation and auditing of commercial flood catastrophe models - to ensure that such extreme events have been captured by the cat model event set; validation of sustainable drainage system (SUDS) designs - to ensure the design rainfall would have replicated the most extreme historical events

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Data and Resources

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Additional Info

Field Value
Author Hydro-GIS Ltd.
Last Updated September 23, 2020, 07:35 (Etc/UTC)
Created July 27, 2018, 10:22 (Etc/UTC)
Origin Places United Kingdom of Great Britain and Northern Ireland

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