The Disaster Patterns of Landslides and Avalanches Will Still Need to be Closely Identified and Monitored in the Future in the Three Gorges Reservoir Area

CHANG Hong

doi:10.3969/j.issn.2097-0013.2024.04.011

2024 Vol. 40, No. 4

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CHANG Hong. 2024. The Disaster Patterns of Landslides and Avalanches Will Still Need to be Closely Identified and Monitored in the Future in the Three Gorges Reservoir Area. South China Geology, 40(4): 725-736. doi: 10.3969/j.issn.2097-0013.2024.04.011

Citation:

CHANG Hong. 2024. The Disaster Patterns of Landslides and Avalanches Will Still Need to be Closely Identified and Monitored in the Future in the Three Gorges Reservoir Area. South China Geology, 40(4): 725-736. doi: 10.3969/j.issn.2097-0013.2024.04.011

The Disaster Patterns of Landslides and Avalanches Will Still Need to be Closely Identified and Monitored in the Future in the Three Gorges Reservoir Area

CHANG Hong^1,2,

1.
Wuhan Center, China Geological Survey (Geosciences Innovation Center of Central South China), Wuhan 430205, Hubei, China
2.
Hubei Key Laboratory of Operation Safety of High Dam and Large Reservoir, Yichang 443133, Hubei, China

Received Date: 18 September 2024

Revised Date: 30 September 2024

Publish Date: 20 December 2024

Abstract

Abstract

The monitoring and early warning system for geological hazards in the Three Gorges Reservoir area has demonstrated significant effectiveness. However, given the increasing frequency of extreme climate and rainfall, the overall situation for disaster prevention and control remains challenging. In this context, the patterns of newly emerged landslide, avalanche, and accumulation reactivation over the past 20 years since the reservoir’s impoundment continue to hold practical significance. This paper, through an analysis of relevant case studies in the Three Gorges Reservoir area, combining previous research and comparisons with cases from the Hunan-Hubei mountain region, the Sichuan Basin, and areas not influenced by reservoir waters, identifies several disaster patterns that warrant ongoing attention. These include potential bedding rock landslides in areas with unique geological structures and landforms, rock collapses above mined-out areas or cavities, soil-like landslide and avalanche in heavily weathered zones of red beds, salt dissolution rocks, and fractured bedrock, as well as the reactivation and destabilization of soil slope deposits. These findings provide valuable references for the early identification and monitoring of hidden hazards along the reservoir banks, and guidance for future planning.
- Three Gorges Reservoir area /
- potential landslide identification /
- avalanche above mining /
- soil-like landslide and avalanche /
- landslide reactivation /
- disaster patterns

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References

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