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(Article of periodic en Anglais - 2014)

Document title

Bedload hysteresis in a glacier-fed mountain river

Authors(s) and Affiliation(s)

MAO L. (1) ; DELL'AGNESE A. (2) ; HUINCACHE C. (1) ; PENNA D. (2 3) ; ENGEL M. (2 4) ; NIEDRIST G. (4) ; COMITI F. (2) ;
(1) Dept. of Ecosystems and Environment, Pontifica Univ. Catolica, Santiago, CHILI
(2) Fac. of Science and Technology, Free Univ. of Bozen-Bolzano, Bolzano, ITALIE
(3) Dept. of Land, Environment, Agriculture and Forestry, Univ., Padova, ITALIE
(4) Inst. for alpine Environment, EURAC, Bozen-Bolzano, ITALIE

Abstract

This work focuses on the temporal variability of bedload transport in an alpine catchment (Saldur basin, Italian Alps) where bedload transport was monitored by means of an acoustic pipe sensor which detects the acoustic vibrations induced by particles hitting a 0.5m-long steel pipe. Runoff dynamics are dominated by snowmelt in late spring/early summer, mostly by glacier melt in late summer/early autumn, and by a combination of the snow and glacier melt in mid-summer. The results indicate that hysteretic patterns during daily discharge fluctuations are predominantly clockwise during the snowmelt period, likely due to the ready availability of unpacked sediments within the channel or through bank erosion in the lower part of the basin. On the contrary, counterclockwise hysteresis tend to be more frequent during late glacier melting period. The results indicate that runoff generation processes play a crucial role on sediment supply and temporal availability in mountain streams

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2014, vol. 39, no7 [pp. 964-976]

Bibliographic references : 2 p.

Collation : 11 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3563

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
Refdoc record number (ud4) : 28681966 : Permanent link - XML version
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