| Citation: |
LIU Yong, ZHANG Wen, WEI Liangshuai. 2024. Developmental Characteristics and Potential Disaster Mechanism of Rock Glaciers in the Middle Reaches of the Yarlung Zangbo River. Northwestern Geology, 57(1): 44-54. doi: 10.12401/j.nwg.2023136
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Developmental Characteristics and Potential Disaster Mechanism of Rock Glaciers in the Middle Reaches of the Yarlung Zangbo River
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Abstract
Rock glaciers are a type of ice-marginal landforms with creep-slip characteristics formed by gravity and freeze-thaw based on ice and rock mixtures, and they have a large distribution in the Qinghai-Tibet Plateau and Tianshan Mountains in China. Monitoring studies in recent years have found that a significant acceleration process of creep slip on the surface of rock glaciers has occurred under the influence of climate warming, and the risk of forming mudflows or landslides has increased. The Qinghai-Tibet Plateau is a sensitive area of global warming, and the geological disasters caused by climate warming have received wide attention. In view of this, this paper analyzes and discusses the development characteristics and potential disaster mechanisms of rock glaciers on both sides of the Sangri-Jiacha Gorge in the middle reaches of the Yarlung Zangbo River using field measurements, remote sensing interpretation and theoretical analysis. The results show that the formation and development of rock glaciers are related to the topography, climate and solar radiation of the nurturing environment, and that they are prone to form mudflows or landslides threatening the downstream under the effect of rising temperature, short-duration heavy rainfall or strong earthquakes, mainly manifested by the instability of the constituent materials of the downstream section of rock glaciers.
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References
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LIU Yong, ZHANG Wen, WEI Liangshuai. 2024. Developmental Characteristics and Potential Disaster Mechanism of Rock Glaciers in the Middle Reaches of the Yarlung Zangbo River. Northwestern Geology, 57(1): 44-54. doi: 10.12401/j.nwg.2023136
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Figure 1.
Location map of the study area
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Figure 2.
Distribution of remote sensing images of typical rock glaciers
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Figure 3.
Typical rock glacier distribution diagram
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Figure 4.
Typical moraine-type rock glacier
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Figure 5.
Typical talus-type rock glacier
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Figure 6.
Distribution map of rock glaciers in the study area
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Figure 7.
Rock glacier property parameter statistics
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Figure 8.
Distribution of slope and flow direction of rock glaciers in the study area
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Figure 9.
Surface layer of Barungunba i talus-type rock glacier
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Figure 10.
Gaqiongrong moraine type rock glacier
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Figure 11.
Rock chip size statistics
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Figure 12.
Rock chip grinding roundness statistics
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Figure 13.
Full view of the Waldegrenje Rock Glacier
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Figure 14.
Distribution of contour lines of the Waldegunjerite glacier
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Figure 15.
Siltation at the leading edge of the ice-eroded trough valley on the east side of the Voka Basin