[1]AN Zhi-shan,ZHANG Ke-cun,QU Jian-jun,et al.Sand Hazard Characteristics and Genetic Analysis along the Qinghai-Tibet Railway[J].Research of Soil and Water Conservation,2014,21(02):285-289.
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Sand Hazard Characteristics and Genetic Analysis along the Qinghai-Tibet Railway
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 02
Page number:
285-289
Column:
Public date:
2014-04-28
- Title:
- Sand Hazard Characteristics and Genetic Analysis along the Qinghai-Tibet Railway
- Keywords:
- Tibetan Plateau; global warming; sand damages
- CLC:
- P425.5+5;U216.41+9.2
- DOI:
- -
- Abstract:
- The Tibet Plateau is the unique geographical unit in the world. It has significant response to global warming. With the completion of the Qinghai-Tibet railway, the railway sand disasters had become increasingly serious. After the field investigation，the authors revealed the characteristics of sand damages. With the temperature rising, the glaciers are shrinking. The snow-line is rising. The permafrost is degenerating. The plateau meadow and grassland have the desertification. Therefore, the original fixed detrital material releases. Second, the freeze-thaw cycles enhanced, the surface soil structure decomposed and formed more detrital material. So, the sand sources increased. According to climate data, the windy period combing with an arid seasonal climate increased the risk of blowing sand in this area. It rarely snows in winter and the land surface is usually bare. Meanwhile, the wind is very strong and unidirectional along the Qinghai-Tibet Railway and the dominant direction is west. And it belongs to high-energy wind environment along Qinghai-Tibet Railway. Predominant wind has a unidirectional characteristic. The dominant directions of sand transport are westerly in the observed period. Third, the Qinghai-Tibet Railway opened to traffic and resulting in railway flow field change, breaking the local original sediment balance, forming sand sedimentation environment easily. Therefore, the sand damages readily occur because of the factors mentioned above.
- References:
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