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(Article of periodic en Anglais - 2010)

Document title

Debris flows resulting from glacial-lake outburst floods in Tibet, China

Authors(s) and Affiliation(s)

CUI P. (1 2) ; DANG C. (3) ; CHENG Z. (1 2) ; SCOTT K.M. (4) ;
(1) Key Lab. of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, CHINE
(2) Inst. of Mountain Hazards and Environment, CAS, Chengdu, CHINE
(3) China Three Gorges Univ. Key Lab. of Geological Hazards on Three Gorges Reservoir Area, Ministry of Education Yichang, Hubei, CHINE
(4) U.S. Geological Survey, Cascades Volcano Observatory, Vancouver, Washington, ETATS-UNIS

Abstract

During the last 70 years of general climatic amelioration, 18 glacial-lake outburst floods (GLOFs) and related debris flows have occurred from 15 moraine-dammed lakes in Tibet, China. Catastrophic loss of life and property has occurred because of the following factors: the large volumes of water discharged, the steep gradients of the U-shaped channels, and the amount and texture of the downstream channel bed and bank material. These flood discharges transformed to non-cohesive debris flows if the channels contained sufficient loose sediment for entrainment (bulking) and if their gradients were >1%. The AA. focus on this key element, transformation, and suggest that it be included in evaluating future GLOF-related risk, the probability of transformation to debris flow and hyperconcentrated flow

Source

Article of periodic

published at : Physical geography / ISSN 0272-3646

Editor : Taylor & Francis, Abingdon - ROYAUME-UNI (1980)

Millesime : 2010, vol. 31, no6 [pp. 508-527]

Bibliographic references : 3 p.

Collation : 8 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 20106

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.2747/0272-3646.31.6.508

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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