Abstract
<p>In the mountain area, Deep seated gravitational slope deformation (DSGSD) is a phenomenon that causes rock mass deformation under long-term gravity. In the Slate Belt of the Backbone Range where mainly slate distributed, it is more susceptible to develop DSGSD. After Typhoon Morakot, the high-resolution LiDAR digital terrain data of the entire island of Taiwan could be applied to visual interpretation with the potential landslide area. In this study, we used existing high-resolution LiDAR data and the latest computerized 3D environments to conduct and explore preliminary geological information at the regional scale and potential large-scale landslide distribution with detailed topographical characteristics. Through field investigations and UAV application in Lusan area of central Taiwan, the features caused by regional tectonic effects or DSGSD could be clarified and discussed possible mechanism of rock mass failure caused by these DSGSD. The results help to understand the deformation mechanism of the slate area in the Central Range of Taiwan. In the future, we could further explore the possible causes of why DSGSD transform into catastrophic landslides.</p>
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