Field monitoring study of bedrock weathering on the southern flank of the Hengduan Mountains in Southeast Tibet

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2024-12-10 DOI:10.1016/j.coldregions.2024.104398

Liping Wang , Zhexiao Hao , Honggang Zhang , Chenlei Zheng , Weiyu Wu , Xiaoliang Yao

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引用次数: 0

Abstract

This study aims to reveal the patterns and influencing factors of bedrock weathering in the high-altitude cold regions on the southern flank of the Hengduan Mountains in southeastern Tibet. Based on the site characteristics, we designed and installed a simple, practical, and cost-effective remote online monitoring system. Data were collected from April 2023 to April 2024, covering the temperature of the rock surface air and at various depths within the rock, as well as the temperature, humidity, and width changes within rock fractures. The results indicate that for bedrock located on sunny slopes with relatively little rain and snow, the daily maximum temperatures on the rock surface and in shallow layers exceed the daily maximum air temperature due to solar radiation. Specifically, the daily maximum air temperature at the rock surface is approximately 5–20 °C higher than the maximum air temperature, resulting in an actual daily temperature difference of 30–40 °C on the rock surface air. Therefore, using air temperature as the boundary condition for this type of bedrock is inappropriate. For rock fractures connected to the external environment, the daily average temperature within the fracture is generally 3–8 °C higher than the daily average air temperature, and the range of temperature variation within the fracture is smaller than that of the external air temperature. However, due to differences in fracture width and depth, the humidity within fractures shows significant variation. For such slope bedrock, temperature variations in spring, summer, and autumn, rather than freeze-thaw cycles in winter, may be the primary cause of rock weathering. This study provides scientific support for engineering construction in cold regions and valuable field data to refine the theory of alpine bedrock weathering.

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.