Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area

The stability of the reservoir bank landslide is affected by a variety of external factors, and the fluctuation of reservoir water level is one of the important influencing factors. The Erdaohe landslide is a typically colluvial landslide in the Three Gorges Reservoir area with periodic reservoir wa...

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Autores principales:	Zhaodan Cao, Jun Tang, Xiaoer Zhao, Yonggang Zhang, Bin Wang, Lichen Li, Fei Guo
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi-Wiley 2021
Materias:	Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/16f5315f8d3845c78feb621edc8683f6
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spelling	oai:doaj.org-article:16f5315f8d3845c78feb621edc8683f62021-11-29T00:56:14ZFailure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area1468-812310.1155/2021/6865129https://doaj.org/article/16f5315f8d3845c78feb621edc8683f62021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6865129https://doaj.org/toc/1468-8123The stability of the reservoir bank landslide is affected by a variety of external factors, and the fluctuation of reservoir water level is one of the important influencing factors. The Erdaohe landslide is a typically colluvial landslide in the Three Gorges Reservoir area with periodic reservoir water level fluctuations. According to landslide displacement data, the displacement of the Erdaohe landslide exhibits the significantly stepwise feature. Its failure mechanism was analyzed using strength reduction method by the FLAC3D package in the case of reservoir water level changes. The results indicate that the hydrodynamic pressure has an important impact on the initialization of the landslide failure. When reservoir water level rises rapidly or maintains constant at the lower level, the landslide stability would be higher. When the reservoir water level decreases rapidly or maintains constant at the higher level, the landslide stability will be smaller. When the reservoir water level was in the lowest elevation, the factor of safety (FS) reached the minimum value of 1.11. Findings in this paper can provide guidelines for the risk assessment of colluvial landslides.Zhaodan CaoJun TangXiaoer ZhaoYonggang ZhangBin WangLichen LiFei GuoHindawi-WileyarticleGeologyQE1-996.5ENGeofluids, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geology QE1-996.5
spellingShingle	Geology QE1-996.5 Zhaodan Cao Jun Tang Xiaoer Zhao Yonggang Zhang Bin Wang Lichen Li Fei Guo Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
description	The stability of the reservoir bank landslide is affected by a variety of external factors, and the fluctuation of reservoir water level is one of the important influencing factors. The Erdaohe landslide is a typically colluvial landslide in the Three Gorges Reservoir area with periodic reservoir water level fluctuations. According to landslide displacement data, the displacement of the Erdaohe landslide exhibits the significantly stepwise feature. Its failure mechanism was analyzed using strength reduction method by the FLAC3D package in the case of reservoir water level changes. The results indicate that the hydrodynamic pressure has an important impact on the initialization of the landslide failure. When reservoir water level rises rapidly or maintains constant at the lower level, the landslide stability would be higher. When the reservoir water level decreases rapidly or maintains constant at the higher level, the landslide stability will be smaller. When the reservoir water level was in the lowest elevation, the factor of safety (FS) reached the minimum value of 1.11. Findings in this paper can provide guidelines for the risk assessment of colluvial landslides.
format	article
author	Zhaodan Cao Jun Tang Xiaoer Zhao Yonggang Zhang Bin Wang Lichen Li Fei Guo
author_facet	Zhaodan Cao Jun Tang Xiaoer Zhao Yonggang Zhang Bin Wang Lichen Li Fei Guo
author_sort	Zhaodan Cao
title	Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
title_short	Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
title_full	Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
title_fullStr	Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
title_full_unstemmed	Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area
title_sort	failure mechanism of colluvial landslide influenced by the water level change in the three gorges reservoir area
publisher	Hindawi-Wiley
publishDate	2021
url	https://doaj.org/article/16f5315f8d3845c78feb621edc8683f6
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Failure Mechanism of Colluvial Landslide Influenced by the Water Level Change in the Three Gorges Reservoir Area

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