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Using attributes of electromagnetic waves to determine the water content and frost table in a permafrost area
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作者 zhi chun zhang Yu Peng Shen +3 位作者 Xiao Wang Ya Hu Tian Jian Kun Liu Bagdat Teltayev 《Research in Cold and Arid Regions》 CSCD 2017年第3期261-266,共6页
The thawing-melting of the permafrost damages the subground of highways on the Qinghai-Tibet Plateau.With the application of ground-penetrating-radar(GPR)technology,the maximum permafrost melting interface can be effe... The thawing-melting of the permafrost damages the subground of highways on the Qinghai-Tibet Plateau.With the application of ground-penetrating-radar(GPR)technology,the maximum permafrost melting interface can be effectively distinctly differentiated and imaged.A hierarchical feature of the permafrost region is shown clearly on the imaging profile of GPR data.The complete ablation zone or part of it is displayed distinctly.In addition,the details of subsurface layers can be effectively characterized by GPR attribute-analysis technology.With the attribute calculation and filter,the instantaneous amplitude,instantaneous frequency,and relative wave impedance can be applied in a more efficient way to divide the complete ablation zone,part of the ablation and non-ablation interface.The relative distribution of water content in a seasonally thawing permafrost region can be obtained through a comprehensive GPR attribute analysis. 展开更多
关键词 PERMAFROST thawing ground-penetrating-radar GEOPHYSICAL ATTRIBUTE RELATIVE water content
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