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Estimate the Permafrost Degradation at Muli Coalfield, Qinghai-Tibet Plateau
The aim of this study is to estimate the permafrost degradation in the Muli coalfield, an opencast mining site in the northeast of the Qinghai-Tibet Plateau. The estimation is based on the field geo-temperature observation, and on the quantitative analysis for the relationship between the permafrost degradation and vegetation perishment. The field geo-temperature observation is interpreted from three aspects. First, the soils beneath the surface covered by stockpiled gangue and exposed topsoil have been greatly warmed, and experience temperature fluctuation. Second, the soil under the stockpiled gangue is warmer than that under the exposed topsoil. Third, in warm season the surfaces covered by the stockpiled gangue and exposed topsoil absorb more solar heat, leading to the warming of the underlying permafrost. But in cold season, the thermal conditions under the stockpiled gangue, exposed topsoil, and natural vegetation are approximately the same. The quantitative analysis shows that the permafrost degradation significantly leads to the perishment of vegetation, which in turn accelerates the permafrost degradation. Therefore, it can be concluded that the permafrost in the Muli coalfield is experiencing degradation.
Estimate the Permafrost Degradation at Muli Coalfield, Qinghai-Tibet Plateau
The aim of this study is to estimate the permafrost degradation in the Muli coalfield, an opencast mining site in the northeast of the Qinghai-Tibet Plateau. The estimation is based on the field geo-temperature observation, and on the quantitative analysis for the relationship between the permafrost degradation and vegetation perishment. The field geo-temperature observation is interpreted from three aspects. First, the soils beneath the surface covered by stockpiled gangue and exposed topsoil have been greatly warmed, and experience temperature fluctuation. Second, the soil under the stockpiled gangue is warmer than that under the exposed topsoil. Third, in warm season the surfaces covered by the stockpiled gangue and exposed topsoil absorb more solar heat, leading to the warming of the underlying permafrost. But in cold season, the thermal conditions under the stockpiled gangue, exposed topsoil, and natural vegetation are approximately the same. The quantitative analysis shows that the permafrost degradation significantly leads to the perishment of vegetation, which in turn accelerates the permafrost degradation. Therefore, it can be concluded that the permafrost in the Muli coalfield is experiencing degradation.
Estimate the Permafrost Degradation at Muli Coalfield, Qinghai-Tibet Plateau
Qin, Yinghong (author)
14th Conference on Cold Regions Engineering ; 2009 ; Duluth, Minnesota, United States
Cold Regions Engineering 2009 ; 162-171
2009-08-27
Conference paper
Electronic Resource
English
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