Topographic Sheltering Index data set of Qinghai Tibet Plateau (250m)

Topographic Sheltering Index data set of Qinghai Tibet Plateau (250m)


It has been a difficult problem to explore the mechanism of geomorphic influence on the distribution pattern of trees in Qinghai Tibet Plateau, and how to show the geomorphic influence more accurately. According to the field and literature survey, it is found that under the better terrain shelter, both the growth of arbor and shrub vegetation has a positive effect. This effect mainly includes the sheltering of wind by terrain and the increase of soil moisture and air humidity by terrain water accumulation. In this study, 250mdem is used to simulate the effect of vegetation occlusion, which is called Topographic Sheltering Index (TSI). C language is used to program and calculate the cumulative horizontal angle of obstacles at the target point. The judgment condition of obstacles is that the distance between the obstacles and the target point is less than 15-20 times of the height difference between the obstacles and the target point, and the multiple is adjustable, which is selected as 15 times according to the actual situation of the plateau, Taking 8km as the search radius and 10 degrees as the search angle), the Topographic Sheltering Index of the Qinghai Tibet Plateau is obtained.


File naming and required software

"Topographic Sheltering Index of Qinghai Tibet Plateau (250m). TIF“
ArcMap can be used for data processing.


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Cite as:

Zhou, Y., Cheng, M., Tian, R. (2021). Topographic Sheltering Index data set of Qinghai Tibet Plateau (250m). National Tibetan Plateau Data Center, (Download the reference: RIS | Bibtex )

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.


References literature

1.Huang, K.Y. (2002). Evaluation of the topographic sheltering effects on the spatial pattern of Taiwan fir using aerial photography and GIS. International Journal of Remote Sensing, 23(10), 2051-2069. (View Details )

2.MCNAB, & WH. (1989). Terrain shape index - quantifying effect of minor landforms on tree height. FOREST SCI, 35(1)(-), 91-104. (View Details )

3.Lapen, D., Martz, L. (1993). The measurement of two simple topographic indices of wind sheltering-exposure from raster digital elevation models. Computers & Geosciences, 19(6), 769-779. (View Details )

4.Mcnab, W.H. (1992). A topographic index to quantify the effect of mesoscale landform on site productivity. Revue Canadienne De Recherche Forestière, 23(6), 1100-1107. (View Details )

5.Lynn, M., Resler, David, R., & Butler, et al. (2005). Topographic shelter and conifer establishment and mortality in an alpine environment, glacier national park, montana. Physical Geography. (View Details )


Support Program

National Key Research and Development Program of China

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License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)


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Keywords
Geographic coverage
East: 104.78 West: 73.31
South: 39.78 North: 26.00
Details
  • Temporal resolution: 1000 year < x
  • Spatial resolution: 100m - 1km
  • File size: 517 MB
  • Views: 413
  • Downloads: 18
  • Access: Open Access
  • Updated time: 2021-06-26
Contacts
: ZHOU Yaozhi   CHENG Ming   TIAN Rui  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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