High-magnitude flooding across Britain since AD 1750

Macdonald, N ORCID: 0000-0003-0350-7096 and Sangster, H ORCID: 0000-0001-6024-9041
(2017) High-magnitude flooding across Britain since AD 1750. Hydrology and Earth System Sciences, 21 (3). pp. 1631-1650.

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The last decade has witnessed severe flooding across much of the globe, but have these floods really been exceptional? Globally, relatively few instrumental river flow series extend beyond 50 years, with short records presenting significant challenges in determining flood risk from high-magnitude floods. A perceived increase in extreme floods in recent years has decreased public confidence in conventional flood risk estimates; the results affect society (insurance costs), individuals (personal vulnerability) and companies (e.g. water resource managers). Here, we show how historical records from Britain have improved understanding of high-magnitude floods, by examining past spatial and temporal variability. The findings identify that whilst recent floods are notable, several comparable periods of increased flooding are identifiable historically, with periods of greater frequency (flood-rich periods). Statistically significant relationships between the British flood index, the Atlantic Meridional Oscillation and the North Atlantic Oscillation Index are identified. The use of historical records identifies that the largest floods often transcend single catchments affecting regions and that the current flood-rich period is not unprecedented.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 20 Mar 2017 11:22
Last Modified: 19 Jan 2023 07:09
DOI: 10.5194/hess-21-1631-2017
Open Access URL: http://www.hydrol-earth-syst-sci.net/21/1631/2017/
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006525