Mots-clés
Accumulation fluviatile Bloc Colluvions Crue Datation Holocène Montagne Méthodologie Norvège Norvège du Sud Paléocrue Boulder Colluvium Dating Flood Fluvial deposit Holocene Methodology Mountain Norway Palaeofloods Southern Norway Acumulación fluviátil Coluviones Crecida Datación Holoceno Metodología Montaña NoruegaHigh-precision Schmidt-hammer exposure-age dating of flood berms, Vetlestølsdalen, alpine southern Norway : first application and some methodological issues
Auteur(s) et Affiliation(s)
MATTHEWS, J.A.
Dep. of Geography, College of Science, Univ., Swansea, Royaume-Uni
MCEWEN, L.J.
Dep. of Geography and Environmental Management, Univ. of West of England, Bristol, Royaume-Uni
Description :
Schmidt-hammer exposure-age dating (SHD) was applied to 3 flood berms in upper Vetlestølsdalen, southern Norway, using a local, high-precision calibration curve that takes account of the colluvial origin of fluvial boulders in the youngest berm, which was deposited during the August 1979 flood. Precision of SHD dating for this berm was estimated as 210 years. The dated berms indicate a return period of 1000–1500 years for floods of the magnitude of the 1979 flood event in the upper catchment. Thus, the long-term persistence of flood boulder berms in the landscape has potential for reconstructing Holocene flood history and palaeohydrology from the geomorphic legacy of the most extreme Holocene floods.
Type de document :
Article de périodique
Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2013, vol. 95, n°. 2, p. 185-195, nombre de pages : 11, Références bibliographiques : 1 p.
Date :
2013
Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)