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(Article of periodic en Anglais - 2013)

Document title

Quantifying rainfall controls on catchment-scale landslide erosion in Taiwan

Authors(s) and Affiliation(s)

CHEN Y.-C. (1) ; CHANG K.-T. (2) ; CHIU Y.-J. (3) ; LAU S.-M. (3) ; LEE H.-Y. (1) ;
(1) Dep. of Civil Engineering, National Univ. of Technology, Taipei, TAIWAN, PROVINCE DE CHINE
(2) Kainan Univ., Taoyuan County, TAIWAN, PROVINCE DE CHINE
(3) Hydrotech Research Inst., National Taiwan Univ., Taipei, TAIWAN, PROVINCE DE CHINE

Abstract

The AA. quantified landslide erosion triggered by 24 rainfall events from 2001 to 2009 in 3 mountainous watersheds in Taiwan and investigated relationships between landslide erosion and rainfall variables. The results show positive power-law relations between landslide erosion and rainfall intensity and cumulative rainfall. Additionally, landslide erosion caused by Typhoon Morakot is of comparable magnitude to landslide erosion caused by the Chi-Chi Earthquake or 22-24 years of basin-averaged erosion. Comparison of the 3 watersheds indicates that deeper landslides that mobilize soil and bedrock are triggered by long-duration rainfall, whereas shallow landslides are triggered by short-duration rainfall. These results suggest that rainfall intensity and watershed characteristics are important controls on rainfall-triggered landslide erosion and that severe typhoons, like high-magnitude earthquakes, can generate high rates of landslide erosion in Taiwan

Source

Article of periodic

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

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

Millesime : 2013, vol. 38, no4 [pp. 372-382]

Bibliographic references : 2 p.

Collation : 7 fig., 6 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3284

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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