The active layer depth distribution map of the Qinghai-Tibet engineering corridor (1980-2015)


Based on the existing natural hole data of 15 active layer depth monitoring sites in the Qinghai-Tibet Engineering Corridor, the active layer depth distribution map of the Qinghai-Tibet Engineering Corridor was simulated using the GIPL2.0 frozen soil model. The model required synthesis of a temperature data set of time series. The temperature data were divided into two phases according to the time spans, which were 1980-2009 and 2010-2015. The data of the first phase were from the Chinese meteorological driving data set (http://dam. Itpcas.ac.cn/rs/?q=data#CMFD_0.1), and the data of the second phase was the application of MODIS surface temperature products (MOD11A1/A2 and MYD11A1/A2) with a spatial resolution of 1 km. In addition, the soil type data required by the model came from the China Soil Database (V1.1) and have a resolution of 1 km. At the same time, the topography was also considered. The research area was classified into 88 types based on the measured soil thermophysical parameters and land cover types, and then the simulation was performed.

The simulation results were compared with the field measured data. The results showed that they were highly consistent, and the correlation coefficient reached 0.75. In alpine areas, the average depth of the active layer is below 2.0 m. However, in the river valleys, the average depth of the active layer is above 4.0 m. In the high plain area, the depth of the active layer is usually between 3.0 m and 4.0 m.


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Citations

1. Wu, Q.B., & Niu, F.J. (2013). Permafrost changes and engineering stability in qinghai-xizang plateau. Chinese Science Bulletin, 58(10), 1079-1094.( View Details | Download | Bibtex)

2. Niu, F., Zheng, H., & Li, A. (2018). The study of frost heave mechanism of high-speed railway foundation by field-monitored data and indoor verification experiment. Acta Geotechnica.( View Details | Bibtex)

Cite the data

NIU Fujun. The active layer depth distribution map of the Qinghai-Tibet engineering corridor (1980-2015). National Tibetan Plateau Data Center, 2018. doi: 10.11888/GlaciolGeocryol.tpe.0000079.file. (Download the reference: RIS | Bibtex )

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CASEarth:Big Earth Data for Three Poles(grant No. XDA19070000)

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Keywords
Geographic coverage
Spatial coverage

East: 93.50

South: 34.68

West: 92.83

North: 35.43

Detail
  • Temporal resolution: 10 year < x < 100 year
  • Spatial resolution: km
  • File size: 1 MB
  • Browse count: 448 Times
  • Apply count: 11 Times
  • Share mode: online
  • Temporal coverage: 1980-01-01 To 2015-12-31
  • Updated time: 2019-08-09
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Contact Information
: NIU Fujun  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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