Analysis of the correlation mechanism between the evolution characteristics of giant ancient landslides and urban spatial expansion in southwestern mountainous areas

LIANG Jingtao; ZHAO Cong; ZHANG Su; DONG Jihong; TIE Yongbo; GAO Yanchao; SA Lanpeng; YANG Lei; YAN Shengwu

doi:10.19826/j.cnki.1009-3850.2024.08004

2024 Vol. 44, No. 3

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Article navigation > Sedimentary Geology and Tethyan Geology > 2024 > 44(3): 510-522

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LIANG Jingtao, ZHAO Cong, ZHANG Su, DONG Jihong, TIE Yongbo, GAO Yanchao, SA Lanpeng, YANG Lei, YAN Shengwu. 2024. Analysis of the correlation mechanism between the evolution characteristics of giant ancient landslides and urban spatial expansion in southwestern mountainous areas. Sedimentary Geology and Tethyan Geology, 44(3): 510-522. doi: 10.19826/j.cnki.1009-3850.2024.08004

Citation:

LIANG Jingtao, ZHAO Cong, ZHANG Su, DONG Jihong, TIE Yongbo, GAO Yanchao, SA Lanpeng, YANG Lei, YAN Shengwu. 2024. Analysis of the correlation mechanism between the evolution characteristics of giant ancient landslides and urban spatial expansion in southwestern mountainous areas. Sedimentary Geology and Tethyan Geology, 44(3): 510-522. doi: 10.19826/j.cnki.1009-3850.2024.08004

Analysis of the correlation mechanism between the evolution characteristics of giant ancient landslides and urban spatial expansion in southwestern mountainous areas

1.
Evaluation and Utilization of Strategic Rare Metals and Rare Earth Resource Key Laboratory of Sichuan Province, Sichuan Institute of Comprehensive Geological Survey, Chengdu 610081, China
2.
Sichuan Non Metallic (Salt Industry) Geological Survey and Research Institute, Zigong 643000, China
3.
Chengdu Center of China Geological Survey, Geosciences Innovation Center of Southwest China, Chengdu 610218, China
4.
Yunnan Geological Engineering Survey and Design Institute Co., Ltd., Kunming 650041, China

More Information

Corresponding author: ZHAO Cong, 735069327@qq.com

Received Date: 18 July 2024

Revised Date: 09 August 2024

Accepted Date: 09 August 2024

Publish Date: 30 September 2024

Abstract

Abstract

The deformation and revival of giant ancient landslide bodies pose one of the primary threats to the development of towns in the southwestern mountainous regions of China. Taking the ancient landslide in Daguan County of Yunnan Province as an example, this paper utilizes airborne lidar aerial survey, InSAR monitoring, multi-phase optical image comparative interpretation, and field investigation to study the development and evolution characteristics, as well as the stability status of the ancient landslide. Furthermore, it delves into the correlation mechanism between the evolution characteristics of the ancient landslide and the characteristics of urban spatial expansion. The results show that the ancient landslide in Daguan County exhibit obvious signs of staged movement evolution, and the existing landslide landform did not form in a single movement process. Overall, the ancient landslide is currently in a stable state, with some areas affected by human engineering activities or heavy rainfall, showing multiple signs of small and medium-sized local revival. Between 1970 and 2022, the urban area of Daguan County expanded by 7.56 times. Affected by urban spatial expansion, five new landslides and six resurgent secondary landslides on the surface of the ancient landslide are distributed near residential expansion areas and road excavation areas. The primary engineering factors influencing the stability of the ancient landslide in Daguan County are house-building, cutting slopes, and road excavation. In the process of urban construction and development in the western mountainous regions of China, close attention should be paid to the impact of human engineering activities on slope stability.
- southwest mountainous area /
- ancient landslide /
- evolutionary characteristics /
- urban expansion /
- multi-source remote sensing

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References

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