时间域航空电磁法在多年冻土调查研究中的应用

doi:10.11720/wtyht.2024.1246

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Abstract

Investigating the spatial distribution of permafrost is critical for cryosphere research. At present, China's investigation concerning the spatial distribution of permafrost generally employs the detection method of ground geophysical exploration combined with logs to obtain local point or line data. Alternatively, different remote sensing models can be used to simulate and estimate the thickness of regional permafrost. This study inferred the spatial distribution of permafrost based on airborne time-domain electromagnetic (TDAEM) data and resistivity calculation results. The comparative analysis of the inference results and the known drilling data reveals an average error of 18.5% between the permafrost thickness inferred from the inversion results of TDAEM data and the result determined by borehole temperature measurements. This suggests that the TDAEM method exhibits high effectiveness and accuracy in permafrost thickness investigation. With technical advantages like high efficiency and minor topographic influence, the TDAEM method can be applied to the large-scale, rapid, and quantitative permafrost investigation in the Qinghai-Tibet Plateau and the Greater Khingan Range in northeast China. Therefore, this study provides a new and effective technical solution for a comprehensive investigation of the spatial distribution of permafrost and its influence on ecological environment changes.

Key words： permafrost investigation airborne time-domain electromagnetic method Qinghai-Tibet Plateau

Received: 05 June 2023 Published: 16 April 2024

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	Articles by authors
	Xue-Zhong YU
	Ru-Kuan XIE
	Xi-Peng SHAN
	Yi-Yuan HE
	Si-Yuan SUN
	Shi-Jun LI

Cite this article:

Xue-Zhong YU,Ru-Kuan XIE,Xi-Peng SHAN, et al. Application of airborne time-domain electromagnetic method in investigation of permafrost[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 342-347.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1246 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/342

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Permafrost and thaw zone around the study area^[18]

Sketch map of airborne time-domain electromagnetic method

Measured resistivity of soil in the study area

Profile of L1140 survey line resistivity-depth profile(a) and interpretation result (b)

The comparison between the interpretation result and borehole data

Three-dimensional resistivity structure of the study area

Three-dimensional spatial distribution of permafrost and ice-rich permafrost in the study area

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