FD2613 - Long-Term Period Rainfall

Theme:Strategy and Policy Development
Project status:Completed
Start date:01/01/2004
End date:01/01/2008


This report presents the results of a major project to develop a new statistical model of point rainfall depth-duration-frequency (DDF) for the UK. It replaces the current Flood Estimation Handbook (FEH) DDF model.

The new model was constructed for estimating rainfall depths falling over durations ranging from 1 hour to 192 hours (8 days) for return periods ranging from 2 years to 10,000 years. However, in many locations it is capable of producing indicative estimates for higher return periods, up to 100,000 years.