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High-resolution assessment of retrogressive thaw slump susceptibility in the Qinghai-Tibet Engineering Corridor

Research in Cold and Arid Regions 2023年第6期15卷 288-294页

作者： GuoAn Yin Jing Luo FuJun Niu MingHao Liu ZeYong Gao TianChun Dong WeiHeng Ni Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China China Railway Qinghai-Tibet Group Co. LtdXiningQinghai 810000China School of Engineering and Science University of Chinese Academy of SciencesBeijing 100049China

Under the rapidly warming climate in the Arctic and high mountain areas,permafrost is thawing,leading to various hazards at a global *** common permafrost hazard termed retrogressive thaw slump(RTS)occurs extensively in ice-rich permafrost *** the spatial and temporal distributive features of RTSs in a changing climate is crucial to assessing the damage to infrastructure and *** this end,we used a machine learning-based model to investigate the environmental factors that could lead to RTS occurrence and create a susceptibility map for RTS along the Qinghai-Tibet Engineering Corridor(QTEC)at a local *** results indicate that extreme summer climate events(e.g.,maximum air temperature and rainfall)contributes the most to the RTS occurrence over the flat areas with fine-grained *** model predicts that 13%(ca.22,948 km^(2))of the QTEC falls into high to very high susceptibility categories under the current climate over the permafrost areas with mean annual ground temperature at 10 m depth ranging from-3 to-1℃.This study provides insights into the impacts of permafrost thaw on the stability of landscape,carbon stock,and infrastructure,and the results are of value for engineering planning and maintenance.

关键词： Retrogressive thaw slumps thermokarst Permafrost degradation Machine learning

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俄罗斯东北部提高寒冻土壤稳定性与肥力的工程措施(英文)

引用

冰川冻土 2004年第S1期26卷 179-183页

作者： Nikolay V. Ukhov North-Eastern Research Station Melnikov Permafrost Institute SB RAS Gagarin St. 12 Magadan 685024 Russia

The rational usage of low productive cryogenic landscapes in the North-Eastern part of Russia is impossible without carrying out special engineering preparation\. The preventing from negativethat often has destructive cryogenic processesin the area of ice-covered permafrost soils, provided by its thawing into the marginally necessary depth in thewhole area. The simplest and the most effective engineering method of faulting as anage-old stock （reserve）of surplus moisture in the form of ice from the upper parts of permafrost soils is the creation of continuous furrows net on the wholesurface. This method also raises the fertility of soils, reducesacidity, and raises microbiological activity and the degree of internal structure decaying. Thermophysical calculations and the results of the field study in the experimental firing grounds are the availableevidences of this methodwhich raises thethermal stability of cryogenic landscapes while mastering of global climate changes in different parts of cryolithozone.

关键词： cryosols cryogenic processes furrow net thermokarst

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