Spatial distribution of supra-permafrost groundwater in the Qinghai-Tibet Engineering Corridor using inversion models
作者机构：State Key Laboratory of Frozen Soils EngineeringNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 73000China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing 100049China School of Civil and Hydraulic EngineeringNingxia UniversityYinchuan 750021China
出 版 物：《Advances in Climate Change Research》 (气候变化研究进展（英文版）)
年 卷 期：2024年第15卷第1期
页 面：31-41页
核心收录：
学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程]
基 金：supported by the National Natural Science Foundation of China (42001065 and 41630636) the Open Project of State Key Laboratory of Frozen Soil Engineering (SKLFSE202106) the University First-Class Discipline Construction Project of Ningxia,China (NXYLXK2021A03)
主 题：Dryness index Landsat Soil moisture Groundwater level Qinghai-Tibet Engineering Corridor
摘 要：Supra-permafrost groundwater(SPG)is a key factor that causes damage to highways and railways in the Qinghai-Tibet Engineering Corridor(QTEC).It is difficult to monitor SPG in the field due to their complex formation mechanisms and movement *** single-site field monitoring studies limit the spatial and temporal precision of SPG spatial *** determine the moisture content of shallow soils and the SPG distribution along the QTEC,this work employed the temperature vegetation dryness index and remote sensing models for groundwater table distribution *** accuracies of the models were validated using mea-surements obtained from different sites in the *** the permafrost zones of the QTEC,72%,22%and 6%of the SPG were located at depths of 0.5-1,1 m,***,79.4%of the area along the Qinghai-Tibet Highway(QTH)(Xidatan-Tanggula)section contained *** these sections with SPG,37.9%have an SPG table at depths of 0.5-0.8 *** study preliminarily explored the SPG distribution in the QTEC with a 30 m *** findings can help improve the spatial scale of SPG research,provide a basis for the analysis of the hydrothermal mechanisms,and serve as a guide in the assessment of operational risks and road structure designs.
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