Landslides triggered by the 7 August 2009 Typhoon Morakot in southern Taiwan

被引：94

作者：

Lin, Ching-Weei ^{[1
,2
]}

Chang, Wei-Shu ^{[2
]}

Liu, Shou-Heng ^{[1
]}

Tsai, Tsai-Tsung ^{[2
,3
]}

Lee, Shin-Pin ^{[2
,3
]}

Tsang, Yun-Chung ^{[2
,3
]}

Shieh, Chjeng-Lun ^{[2
,3
]}

Tseng, Chih-Ming ^{[4
]}

机构：

[1] Natl Cheng Kung Univ, Dept Earth Sci, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Disaster Prevent Res Ctr, Tainan 70101, Taiwan

[3] Natl Cheng Kung Univ, Dept Hydraul & Ocean Engn, Tainan 70101, Taiwan

[4] Chang Jung Christian Univ, Dept Land Management & Dev, Tainan, Taiwan

来源：

ENGINEERING GEOLOGY | 2011年 / 123卷 / 1-2期

关键词：

Typhoon Morakot; Landslide; FORMOSAT-2; image; Taiwan; CHI-CHI-EARTHQUAKE; EXAMPLE; BASIN;

D O I：

10.1016/j.enggeo.2011.06.007

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Landslides triggered by Typhoon Morakot with an area over 576 m(2) were mapped from FORMOSAT-2 images. Recognition and calculation of the number and area of landslides show that at least 22,705 landslides with a total area of 274 km(2) were recognized in the 7811 km(2) study area. Among these landslides, 17,417, with a total area of 150 km(2), are recognized as new ones, and 5288, with a total area of 124 km(2), are classified as enlarged from pre-existing ones. Out of the 22,705 landslides, there were 22,221 recognized with an area smaller than 10 ha; 298 recognized in the range of 10 to 20 ha. Twenty-two landslides with an area of over 60 ha have also been identified, and the total area of these landslides is 20 km(2), which is equal to 7.37% of the total landslide area. With respect to exposed rock type, the landslides mainly occurred in Eocene-Miocene slate and Miocene sandstone and shale. In addition, Morakot-induced landslides mainly occurred in areas with cumulative precipitation in the range of 800 to 2600 mm, and the magnitude of landslide concentration is roughly linearly proportional to the amount of cumulative rainfall. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：3 / 12

页数：10

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