Geomorphological and sedimentological evidence for variations in Holocene flooding in Welsh river catchments

Jones, A. F. and Brewer, P. A. and Macklin, M. G. (2010) Geomorphological and sedimentological evidence for variations in Holocene flooding in Welsh river catchments. Global and Planetary Change, 70 (1-4). pp. 92-107. ISSN 09218181

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Abstract

Valley floor geomorphology, sedimentology and radiocarbon dating have been used to reconstruct variations in flooding during the Holocene at six sites within the upper Severn, Teifi and Dee catchments in Wales, UK. High-magnitude palaeoflood deposits, for which ages were estimated, were identified at three floodbasin sites in the upper Severn and Teifi catchments. At the remaining sites fluvial discontinuities, indicative of episodes of increased flooding, were identified. Data from these six sites, and six additional sites studied previously, indicate that seven probably centennial length episodes of major flooding have occurred in Wales since c. 7000 cal BP. These flooding episodes occur at similar times to peaks in flood frequency within Great Britain as a whole. © 2009 Elsevier B.V. All rights reserved.

Keywords:catchment, flood deposit, flood frequency, geomorphology, Holocene, paleoflood, radiocarbon dating, reconstruction, sedimentology, United Kingdom, Wales, Welsh Basin
Subjects:F Physical Sciences > F640 Earth Science
Divisions:College of Science > School of Geography
ID Code:25069
Deposited On:19 May 2017 15:13

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