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(Article of periodic en Anglais - 2008)

Document title

Effects of earthquake and cyclone sequencing on landsliding and fluvial sediment transfer in a mountain catchment

Authors(s) and Affiliation(s)

LIN G.-W. (1) ; CHEN H. (1) ; HOVIUS N. (2) ; HORNG M.-J. (3) ; DADSON S. (4) ; MEUNIER P. (2) ;
(1) Dept. of Geosciences, National Taiwan Univ., Taipei, TAIWAN, PROVINCE DE CHINE
(2) Dept. of Earth Sciences, Univ., Cambridge, ROYAUME-UNI
(3) Water Resource Agency, TAIWAN, PROVINCE DE CHINE
(4) Centre for Ecology and Hydrology, Wallingford, ROYAUME-UNI

Abstract

Landslides caused by 3 tropical cyclones and a very large earthquake have been mapped in the Chenyoulan catchment in the Taiwan Central Range, where water and sediment discharges and rock strengths are well known. Prior to the Chi-Chi earthquake, the erosion budget was dominated by one exceptionallly large flood, with anomalously high sediment concentrations, caused by typhoon Herb in 1996. Sediment concentrations were much higher than normal in intermediate size floods during the first 5 years after the earthquake, giving high sediment yields. In 2005, sediment concentrations had decreased to values prevalent before 1999. Since the earthquake, hillslope sediment sources have become increasingly disconnected from the channel system, with 90 per cent of landslides not reaching into channels. Downslope advection of landslide debris associated with the Chi-Chi earthquake is driven by the impact of tropical cyclones, but occurs on a time-scale longer than this study

Source

Article of periodic

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

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

Millesime : 2008, vol. 33, no9 [pp. 1354-1373]

Bibliographic references : 1 p.

Collation : 10 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.1716

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2009
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