Simulation of Tsaoling landslide, Taiwan, based on Saint Venant equations over general topography

被引：68

作者：

Kuo, C. Y. ^{[1
]}

Tai, Y. C. ^{[2
]}

Bouchut, F. ^{[3
]}

Mangeney, A. ^{[4
]}

Pelanti, M. ^{[3
]}

Chen, R. F. ^{[5
]}

Chang, K. J. ^{[6
]}

机构：

[1] Acad Sinica, Res Ctr Appl Sci, Div Mech, Taipei, Taiwan

[2] Natl Chi Nan Univ, Dept Civil Engn, Nantou, Taiwan

[3] Ecole Normale Super, CNRS, Dept Math & Applicat, Paris, France

[4] Univ Paris Diderot, Inst Phys Globe Paris, Paris, France

[5] Acad Sinica, Inst Earth Sci, Taipei, Taiwan

[6] Natl Taipei Univ Technol, Dept Civil Engn, Taipei, Taiwan

来源：

ENGINEERING GEOLOGY | 2009年 / 104卷 / 3-4期

关键词：

Arbitrary topography; Chi-Chi earthquake; Earthquake triggered landslide; Rock-and-soil avalanche; Tsaoling geology; Tsaoling landslide; FLUIDIZED GRANULAR MASSES; AVALANCHES; MOTION; FLOW; EARTHQUAKE; RUNOUT; MODEL;

D O I：

10.1016/j.enggeo.2008.10.003

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The 1999 Chi-Chi earthquake triggered the catastrophic Tsaoling landslide in Taiwan. The geomorphological change measured from the data of the 1989 and 2000 aerial photos reveals that the scar and deposit volumes are about 0.126 km(3) and 0.15 km(3) respectively. The debris material ran over a distance of 1.6 km with 500 m descent in elevation. In this paper, we use the continuum model of hydraulic flow, SHALTOP(2D), based on the equations of Bouchut and Westdickenberg to simulate numerically the landslide dynamics. When the mass is moving, the flow is assumed hydrostatic with a basal Coulomb friction. The best fit is obtained using the basal friction angle equal to 6 degrees the only parameter of the simulation, uniformly applied in the calculation domain. The landslide front reaches the Chinshui river valley, the foothill of the slope, within only about 25 s after initiation and the motion settles in about 113 s. The maximum speed is estimated 75 m/s. The spreading of the deposit agrees well with the field measurement (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：181 / 189

页数：9

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