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Classification and distribution of large-scale high-position landslides in southeastern edge of the Qinghai–Tibet Plateau, China

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Abstract

A comprehensive landslide classification system is an essential tool for studying the development law, failure mode, disaster mechanism, and space prediction on the southeastern margin of the Qinghai–Tibet Plateau. However, there is no unanimous agreement on the types of either the landslides in this study site or of rock-related slope failures in general. Thus, the aim of the present study is to take rock mass structure and geo-mechanical action characteristics into account to establish a model of a landslide division system in the Qinghai–Tibet Plateau. On the basis of digital elevation models, field investigations, and literature surveys, we analysed the distribution and failure mode of the landslides in the study area. The geological structure and characteristics of twenty landslides are studied. The geo-mechanical actions of the seismic fault zone and deep-cutting alpine gorge landform on the southeastern margin of the Qinghai–Tibet Plateau are analysed to better understand the failure modes. We divided the landslides according to five categories rock mass structure and four main geo-mechanical effects controlling landslide development. The failure mode of the typical type observed in the southeastern margin of the Qinghai–Tibet Plateau is defined as follows: accumulation slip type, bedding shear type, unloading cutting off type, exogenetic type, wedge landslide, debris flow and freeze–thaw landslide. The proposed types of rock-related landslides are incorporated in the Oldrich Hungr update classification and provide compatibility for the southeastern margin of the Qinghai–Tibet Plateau and other regions with similar geomorphic conditions.

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modified from Li et al. (2021)]

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Funding

This work was financially supported by the National Key Research and Development Project of China (Nos. 2018YFC1505001).

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Correspondence to Yifei Gong.

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Gong, Y., Yao, A., Li, Y. et al. Classification and distribution of large-scale high-position landslides in southeastern edge of the Qinghai–Tibet Plateau, China. Environ Earth Sci 81, 311 (2022). https://doi.org/10.1007/s12665-022-10433-6

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  • DOI: https://doi.org/10.1007/s12665-022-10433-6

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