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(Article of periodic en Anglais - 2012)

Document title

Clastic spring sediments: a tool for palaeoflood reconstruction?

Authors(s) and Affiliation(s)

GALE S.J. (1) ; PENNY D.A. (2) ;
(1) School of Geography, Earth Science and Environment, Univ. of the South Pacific, Suva, FIDJI
(2) School of Geosciences, Univ., Sydney, AUSTRALIE

Abstract

Clastic spring sediments at Mount McKinlay Spring in the Gammon Ranges of northeast South Australia were dated by 14C analysis. Five samples of pollen grains taken from sediments interpreted on geomorphic grounds as post-dating European contact (AD 1843) all yielded dates of AD 1955-1958. These are likely to be the product of sedimentation in March 1956 following the greatest single day's rainfall in the instrumental record. This event, with a return period of around 100 years, may have caused the undercutting of the banks of the creek downstream of the springs, the collapse of mature River Red Gums growing adjacent to the channel and the accumulation of a jam of logs across the creek. The spring deposits appear to represent solely the product of high-magnitude, long return period floods. A series of older spring sediments at the site dating from the first millennium BC to the mid-18th century may therefore provide an opportunity to establish event magnitude and frequency, to determine return periods, and to assess the role of climatic change and human environmental impact on flood frequency

Source

Article of periodic

published at : Zeitschrift für Geomorphologie / ISSN 0372-8854 / CODEN ZGMPAG

Editor : Gebruder Borntraeger, Stuttgart - ALLEMAGNE (1925)

Millesime : 2012, vol. 56, no3 [pp. 387-400]

Bibliographic references : 2 p.

Collation : 387-400

Language

Anglais

INIST-CNRS, Cote INIST : 8829

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1127/0372-8854/2012/0081

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
Refdoc record number (ud4) : 26390996 : Permanent link - XML version
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