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| Combination model of geophysical exploration methods for the permafrost area of the Tibetan Plateau |
| REN Zheng-Wei, LONG Hui, GUO Shu-Jun, LIU Wen-Zeng |
| Center for Hydrogeology and Environmental Geology Survey,CGS,Baoding 071051,China |
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Abstract In the case of global climate change and global warming,permafrost degradation on the Tibetan Plateau will result in great changes of the hydrogeological conditions,which is likely to seriously affect the regional water cycle and ecological environment.The purpose of carrying out research on the geophysical exploration technology is to realize the understanding of geophysical characteristics and the spatial distribution of permafrost.In view of the above situation,6 kinds of technical methods,i.e.,seismic-reflection,converted-wave seismic survey,seismic-refraction,geological radar and audio magnetotelluric survey (EH-4),were compared with each other and analyzed through experimental study.The results show that 6 kinds of geophysical exploration methods can detect permafrost structure,geophysical characteristics,spatial distribution of permafrost and some other geological phenomena;nevertheless,all kinds of technical methods have certain limitations.According to different target tasks,the authors put forward a combination model of three kinds of geophysical exploration methods to detect permafrost in the Tibetan Plateau.This combination model provides technical supports for the geophysical exploration of the permafrost in the Tibetan Plateau.
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Received: 28 August 2016
Published: 20 October 2017
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