Analysis of landslide dam geometries |
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| Authors: | Yu-Shu Kuo Yun-Chung Tsang Kun-Ting Chen Chjeng-Lun Shieh |
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| Institution: | (1) Department of Civil Engineering, National Taipei University of Technology, Taipei, Taiwan, Republic of China;(2) Institute of Earth Sciences, Academia Sinica, Taipei, Taiwan, Republic of China;(3) Department of Geology, Chinese Culture University, Taipei, Taiwan, Republic of China;(4) Laboratoire G?osciences Montpellier, Universit? Montpellier 2, Montpellier, France |
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| Abstract: | The geometry of a landslide dam is an important component of evaluating dam stability. However, the geometry of a natural
dam commonly cannot be obtained immediately with field investigations due to their remote locations. A rapid evaluation model
is presented to estimate the geometries of natural dams based on the slope of the stream, volume of landslides, and the properties
of the deposit. The proposed model uses high resolution satellite images to determine the geometry of the landside dam. These
satellite images are the basic information to a preliminary stability analysis of a natural dam. This study applies the proposed
method to two case studies in Taiwan. One is the earthquake-induced Lung-Chung landslide dam in Taitung, and the second is
the rainfall-induced Shih-Wun landslide dam in Pingtung. |
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