IGB

Connexion

(Article of periodic en Anglais - 2014)

Document title

An assessment of the erosion potential of the fluvial thermal process during ice breakups of the Lena River (Siberia)

Authors(s) and Affiliation(s)

COSTARD F. (1) ; GAUTIER E. (2) ; FEDOROV A. (3) ; KONSTANTINOV P. (3) ; DUPEYRAT L. (1) ;
(1) Univ. Paris-Sud, Lab. des Interactions et Dynamique des Environnements de Surface (IDES), UMR CNRS 8148, Orsay, FRANCE
(2) Lab. de Géographie Physique UMR 8591, CNRS / Univ. Paris 1 - Panthéon-Sorbonne, Meudon, FRANCE
(3) Permafrost Inst., RAS Siberian Branch, Yakutsk, RUSSIE, FEDERATION DE

Abstract

During the initial stage of ice breakup of the Lena River (Yakutia, Siberia), ice pushes up onto the river banks and produces large accumulations of ice and sediments that protect the islands' heads against the mechanical and thermal effects of the river's flow. This initial stage is relatively short and terminates only a few days after breakup begins. In the second phase of flooding, after the river ice has melted, the island heads become free of ice. Hence, when water levels are high, the floodwaters are in sustained contact with the frozen banks of the islands, causing efficient thermal and mechanical erosion of their banks. Such erosion may also occur later in summer, if there is a second discharge peak. Between 2009 and 2012, the retreat of the banks of the river islands displayed high interannual variation that is attributed to the variability of the duration and timing of the flood season

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2014, vol. 25, no3 [pp. 162-171]

Bibliographic references : 28 ref.

Collation : 11 fig., 1 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1812

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28790319 : Permanent link - XML version
Powered by Pxxo