Large earthquake-triggered landslides and mountain belt erosion: The Tsaoling case, Taiwan
Resource
Comptes Rendus Geosciences 337 (13): 1164-1172
Journal
Comptes Rendus Geoscience
Pages
1164-1172
Date Issued
2005
Date
2005
Author(s)
Chen, Rou-Fei
Chan, Yu-Chang
Angelier, Jacques
Huang, Chung
Chang, Kuo-Jen
Shih, Tian-Yuan
Abstract
The 1999 Chi-Chi earthquake triggered the catastrophic Tsaoling landslide in central Taiwan. We mapped the landslide area and estimated the landslide volume, using high-resolution digital elevation model from airborne LiDAR (Light Detection and Ranging), satellite images, aerial photographs and topographic maps. The comparison between cut and fill volumes, about 0.126 and 0.150 km 3 , respectively, suggests a volume increase of 19% due to decompaction during landsliding. In April 2002, the cut and fill volumes were about 0.137 and 0.116 km 3 , respectively. These estimates suggest that 2.5 years after the event, the volume of landslide debris removed by river erosion was nearly 0.045 km 3 . Such a large value highlights the importance of landslide processes for erosion and long-term denudation in the Taiwan mountain belt.
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Type
journal article
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